./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.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_71-funloop_racing.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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --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 11:08:01,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:08:01,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:08:01,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:08:01,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:08:01,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:08:01,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:08:01,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:08:01,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:08:01,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:08:01,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:08:01,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:08:01,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:08:01,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:08:01,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:08:01,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:08:01,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:08:01,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:08:01,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:08:01,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:08:01,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:08:01,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:08:01,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:08:01,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:08:01,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:08:01,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:08:01,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:08:01,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:08:01,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:08:01,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:08:01,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:08:01,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:08:01,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:08:01,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:08:01,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:08:01,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:08:01,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:08:01,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:08:01,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:08:01,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:08:01,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:08:01,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:08:01,914 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:08:01,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:08:01,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:08:01,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:08:01,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:08:01,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:08:01,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:08:01,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:08:01,917 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:08:01,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:08:01,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:08:01,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:08:01,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:08:01,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:08:01,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:08:01,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:08:01,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:08:01,919 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:08:01,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:08:01,919 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:08:01,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:08:01,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:08:01,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:08:01,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:08:01,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:08:01,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:08:01,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:08:01,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:08:01,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:08:01,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:08:01,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:08:01,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:08:01,922 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:08:01,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:08:01,922 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:08:01,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:08:02,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:08:02,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:08:02,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:08:02,237 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:08:02,237 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:08:02,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-09-01 11:08:03,377 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:08:03,623 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:08:03,624 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-09-01 11:08:03,639 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ee03b24/1298c943251e4f609d9f5cb732a27529/FLAGe2be6def8 [2023-09-01 11:08:03,653 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ee03b24/1298c943251e4f609d9f5cb732a27529 [2023-09-01 11:08:03,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:08:03,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:08:03,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:08:03,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:08:03,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:08:03,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:08:03" (1/1) ... [2023-09-01 11:08:03,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48406aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:03, skipping insertion in model container [2023-09-01 11:08:03,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:08:03" (1/1) ... [2023-09-01 11:08:03,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:08:03,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:08:04,076 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_71-funloop_racing.i[41323,41336] [2023-09-01 11:08:04,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:08:04,130 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:08:04,167 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_71-funloop_racing.i[41323,41336] [2023-09-01 11:08:04,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:08:04,243 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:08:04,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04 WrapperNode [2023-09-01 11:08:04,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:08:04,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:08:04,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:08:04,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:08:04,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,287 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2023-09-01 11:08:04,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:08:04,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:08:04,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:08:04,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:08:04,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:08:04,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:08:04,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:08:04,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:08:04,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (1/1) ... [2023-09-01 11:08:04,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:08:04,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:04,365 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 11:08:04,374 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 11:08:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:08:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:08:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:08:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:08:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:08:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:08:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:08:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:08:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:08:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:08:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:08:04,396 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 11:08:04,541 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:08:04,542 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:08:04,886 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:08:04,894 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:08:04,894 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-09-01 11:08:04,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:08:04 BoogieIcfgContainer [2023-09-01 11:08:04,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:08:04,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:08:04,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:08:04,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:08:04,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:08:03" (1/3) ... [2023-09-01 11:08:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b59166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:08:04, skipping insertion in model container [2023-09-01 11:08:04,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:08:04" (2/3) ... [2023-09-01 11:08:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b59166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:08:04, skipping insertion in model container [2023-09-01 11:08:04,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:08:04" (3/3) ... [2023-09-01 11:08:04,912 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-09-01 11:08:04,919 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:08:04,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:08:04,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-09-01 11:08:04,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:08:05,031 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:08:05,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 243 transitions, 494 flow [2023-09-01 11:08:05,208 INFO L130 PetriNetUnfolder]: 73/375 cut-off events. [2023-09-01 11:08:05,209 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 11:08:05,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 375 events. 73/375 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1649 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-09-01 11:08:05,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 243 transitions, 494 flow [2023-09-01 11:08:05,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 238 transitions, 481 flow [2023-09-01 11:08:05,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:08:05,251 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 238 transitions, 481 flow [2023-09-01 11:08:05,257 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 238 transitions, 481 flow [2023-09-01 11:08:05,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 238 transitions, 481 flow [2023-09-01 11:08:05,309 INFO L130 PetriNetUnfolder]: 72/370 cut-off events. [2023-09-01 11:08:05,309 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:08:05,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 370 events. 72/370 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1605 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-09-01 11:08:05,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 19044 [2023-09-01 11:08:07,954 INFO L134 LiptonReduction]: Checked pairs total: 28154 [2023-09-01 11:08:07,954 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-09-01 11:08:07,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:08:07,971 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;@55a9e60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:08:07,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:08:07,976 INFO L130 PetriNetUnfolder]: 15/53 cut-off events. [2023-09-01 11:08:07,976 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:08:07,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:07,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:08:07,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:07,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1071681731, now seen corresponding path program 1 times [2023-09-01 11:08:07,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:07,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653924052] [2023-09-01 11:08:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:08,191 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 11:08:08,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653924052] [2023-09-01 11:08:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653924052] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:08:08,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:08:08,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:08:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466789207] [2023-09-01 11:08:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:08:08,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:08:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:08:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:08:08,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 424 [2023-09-01 11:08:08,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 11:08:08,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:08,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 424 [2023-09-01 11:08:08,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:08,472 INFO L130 PetriNetUnfolder]: 596/1256 cut-off events. [2023-09-01 11:08:08,472 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:08:08,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 1256 events. 596/1256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7130 event pairs, 480 based on Foata normal form. 217/1239 useless extension candidates. Maximal degree in co-relation 2266. Up to 1093 conditions per place. [2023-09-01 11:08:08,476 INFO L137 encePairwiseOnDemand]: 391/424 looper letters, 22 selfloop transitions, 2 changer transitions 38/67 dead transitions. [2023-09-01 11:08:08,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 247 flow [2023-09-01 11:08:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:08:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:08:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-09-01 11:08:08,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290880503144654 [2023-09-01 11:08:08,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-09-01 11:08:08,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-09-01 11:08:08,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:08,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-09-01 11:08:08,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 11:08:08,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 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 11:08:08,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 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 11:08:08,507 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 673 transitions. [2023-09-01 11:08:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 247 flow [2023-09-01 11:08:08,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:08:08,511 INFO L231 Difference]: Finished difference. Result has 66 places, 29 transitions, 73 flow [2023-09-01 11:08:08,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=66, PETRI_TRANSITIONS=29} [2023-09-01 11:08:08,515 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-09-01 11:08:08,516 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 29 transitions, 73 flow [2023-09-01 11:08:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 11:08:08,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:08,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:08,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:08:08,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:08,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1941665266, now seen corresponding path program 1 times [2023-09-01 11:08:08,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:08,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037555624] [2023-09-01 11:08:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:08,586 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 11:08:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037555624] [2023-09-01 11:08:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037555624] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452457872] [2023-09-01 11:08:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:08,590 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 11:08:08,631 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 11:08:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:08:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:08,790 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 11:08:08,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:08,816 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 11:08:08,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452457872] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:08,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:08,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:08:08,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049144423] [2023-09-01 11:08:08,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:08,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:08:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:08:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:08:08,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 424 [2023-09-01 11:08:08,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 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 11:08:08,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:08,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 424 [2023-09-01 11:08:08,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:08,934 INFO L130 PetriNetUnfolder]: 54/139 cut-off events. [2023-09-01 11:08:08,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:08:08,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 139 events. 54/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 377 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 265. Up to 119 conditions per place. [2023-09-01 11:08:08,935 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-09-01 11:08:08,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 139 flow [2023-09-01 11:08:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:08:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:08:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1200 transitions. [2023-09-01 11:08:08,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2023-09-01 11:08:08,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1200 transitions. [2023-09-01 11:08:08,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1200 transitions. [2023-09-01 11:08:08,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:08,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1200 transitions. [2023-09-01 11:08:08,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 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 11:08:08,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 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 11:08:08,948 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 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 11:08:08,949 INFO L175 Difference]: Start difference. First operand has 66 places, 29 transitions, 73 flow. Second operand 6 states and 1200 transitions. [2023-09-01 11:08:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 139 flow [2023-09-01 11:08:08,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:08:08,950 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-09-01 11:08:08,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, 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 11:08:08,952 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -25 predicate places. [2023-09-01 11:08:08,952 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-09-01 11:08:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 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 11:08:08,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:08,953 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:08,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:08:09,159 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 11:08:09,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:09,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -901385091, now seen corresponding path program 2 times [2023-09-01 11:08:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641884933] [2023-09-01 11:08:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:09,297 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 11:08:09,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641884933] [2023-09-01 11:08:09,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641884933] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335296115] [2023-09-01 11:08:09,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:08:09,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:09,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:09,300 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 11:08:09,303 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 11:08:09,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:08:09,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:08:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:08:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:09,386 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 11:08:09,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:09,428 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 11:08:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335296115] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:09,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:08:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644263356] [2023-09-01 11:08:09,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:08:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:08:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:08:09,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 424 [2023-09-01 11:08:09,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 196.30769230769232) internal successors, (2552), 13 states have internal predecessors, (2552), 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 11:08:09,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:09,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 424 [2023-09-01 11:08:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:09,555 INFO L130 PetriNetUnfolder]: 54/145 cut-off events. [2023-09-01 11:08:09,555 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 11:08:09,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 145 events. 54/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 45 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 256. Up to 119 conditions per place. [2023-09-01 11:08:09,556 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 22 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-09-01 11:08:09,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 207 flow [2023-09-01 11:08:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:08:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:08:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2379 transitions. [2023-09-01 11:08:09,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675707547169811 [2023-09-01 11:08:09,563 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2379 transitions. [2023-09-01 11:08:09,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2379 transitions. [2023-09-01 11:08:09,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:09,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2379 transitions. [2023-09-01 11:08:09,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.25) internal successors, (2379), 12 states have internal predecessors, (2379), 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 11:08:09,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 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 11:08:09,580 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 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 11:08:09,581 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 2379 transitions. [2023-09-01 11:08:09,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 207 flow [2023-09-01 11:08:09,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 193 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:08:09,583 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-09-01 11:08:09,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, 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 11:08:09,584 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-09-01 11:08:09,584 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-09-01 11:08:09,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 196.30769230769232) internal successors, (2552), 13 states have internal predecessors, (2552), 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 11:08:09,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:09,586 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:09,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:08:09,791 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 11:08:09,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:09,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2050494557, now seen corresponding path program 3 times [2023-09-01 11:08:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:09,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642382426] [2023-09-01 11:08:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:09,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:09,821 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:08:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:09,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:08:09,866 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:08:09,867 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:08:09,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:08:09,869 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:08:09,871 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:08:09,872 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:08:09,872 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:08:09,918 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:08:09,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-09-01 11:08:09,987 INFO L130 PetriNetUnfolder]: 118/602 cut-off events. [2023-09-01 11:08:09,988 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:08:09,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-09-01 11:08:09,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 314 transitions, 646 flow [2023-09-01 11:08:10,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 314 transitions, 646 flow [2023-09-01 11:08:10,001 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:08:10,001 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 314 transitions, 646 flow [2023-09-01 11:08:10,002 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 314 transitions, 646 flow [2023-09-01 11:08:10,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-09-01 11:08:10,073 INFO L130 PetriNetUnfolder]: 118/602 cut-off events. [2023-09-01 11:08:10,073 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:08:10,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-09-01 11:08:10,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 49128 [2023-09-01 11:08:13,190 INFO L134 LiptonReduction]: Checked pairs total: 84800 [2023-09-01 11:08:13,190 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-09-01 11:08:13,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:08:13,193 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;@55a9e60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:08:13,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:08:13,204 INFO L130 PetriNetUnfolder]: 56/158 cut-off events. [2023-09-01 11:08:13,205 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:08:13,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:13,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:13,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:13,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:13,206 INFO L85 PathProgramCache]: Analyzing trace with hash -914023434, now seen corresponding path program 1 times [2023-09-01 11:08:13,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:13,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123808645] [2023-09-01 11:08:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:13,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:13,242 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 11:08:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:13,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123808645] [2023-09-01 11:08:13,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123808645] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:08:13,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:08:13,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:08:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020704250] [2023-09-01 11:08:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:08:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:08:13,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:08:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:08:13,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 551 [2023-09-01 11:08:13,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 11:08:13,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:13,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 551 [2023-09-01 11:08:13,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:15,443 INFO L130 PetriNetUnfolder]: 19933/30665 cut-off events. [2023-09-01 11:08:15,443 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-09-01 11:08:15,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58992 conditions, 30665 events. 19933/30665 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 212621 event pairs, 17166 based on Foata normal form. 5463/30480 useless extension candidates. Maximal degree in co-relation 20163. Up to 28224 conditions per place. [2023-09-01 11:08:15,535 INFO L137 encePairwiseOnDemand]: 506/551 looper letters, 40 selfloop transitions, 2 changer transitions 42/93 dead transitions. [2023-09-01 11:08:15,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-09-01 11:08:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:08:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:08:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-09-01 11:08:15,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-09-01 11:08:15,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-09-01 11:08:15,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-09-01 11:08:15,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:15,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-09-01 11:08:15,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 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 11:08:15,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 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 11:08:15,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 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 11:08:15,548 INFO L175 Difference]: Start difference. First operand has 87 places, 134 transitions, 286 flow. Second operand 3 states and 874 transitions. [2023-09-01 11:08:15,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-09-01 11:08:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:08:15,554 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 124 flow [2023-09-01 11:08:15,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2023-09-01 11:08:15,556 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-09-01 11:08:15,556 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 124 flow [2023-09-01 11:08:15,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 11:08:15,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:15,557 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:15,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:08:15,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:15,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1596128038, now seen corresponding path program 1 times [2023-09-01 11:08:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:15,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751729044] [2023-09-01 11:08:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:15,606 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 11:08:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751729044] [2023-09-01 11:08:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751729044] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48605110] [2023-09-01 11:08:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:15,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:15,609 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 11:08:15,622 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 11:08:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:08:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:15,708 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 11:08:15,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:15,722 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 11:08:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48605110] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:15,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:15,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 11:08:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395294226] [2023-09-01 11:08:15,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:15,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:08:15,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:08:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:08:15,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 551 [2023-09-01 11:08:15,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 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 11:08:15,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:15,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 551 [2023-09-01 11:08:15,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:16,078 INFO L130 PetriNetUnfolder]: 2090/3401 cut-off events. [2023-09-01 11:08:16,079 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 11:08:16,084 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 131. Compared 18305 event pairs, 1833 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-09-01 11:08:16,094 INFO L137 encePairwiseOnDemand]: 548/551 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-09-01 11:08:16,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-09-01 11:08:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:08:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:08:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1554 transitions. [2023-09-01 11:08:16,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47005444646098005 [2023-09-01 11:08:16,098 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1554 transitions. [2023-09-01 11:08:16,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1554 transitions. [2023-09-01 11:08:16,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:16,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1554 transitions. [2023-09-01 11:08:16,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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 11:08:16,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 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 11:08:16,107 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 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 11:08:16,107 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 124 flow. Second operand 6 states and 1554 transitions. [2023-09-01 11:08:16,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-09-01 11:08:16,108 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 11:08:16,109 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-09-01 11:08:16,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, 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 11:08:16,110 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-09-01 11:08:16,110 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-09-01 11:08:16,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 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 11:08:16,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:16,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:16,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 11:08:16,316 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 11:08:16,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:16,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -727042826, now seen corresponding path program 2 times [2023-09-01 11:08:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:16,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330929791] [2023-09-01 11:08:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:16,392 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 11:08:16,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:16,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330929791] [2023-09-01 11:08:16,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330929791] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:16,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506511124] [2023-09-01 11:08:16,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:08:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:16,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:16,395 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 11:08:16,397 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 11:08:16,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:08:16,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:08:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:08:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:16,490 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 11:08:16,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:16,532 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 11:08:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506511124] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:16,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 11:08:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026878698] [2023-09-01 11:08:16,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:08:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:08:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:08:16,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 551 [2023-09-01 11:08:16,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 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 11:08:16,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:16,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 551 [2023-09-01 11:08:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:16,870 INFO L130 PetriNetUnfolder]: 2090/3407 cut-off events. [2023-09-01 11:08:16,871 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 11:08:16,876 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 132. Compared 18331 event pairs, 1833 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-09-01 11:08:16,884 INFO L137 encePairwiseOnDemand]: 548/551 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-09-01 11:08:16,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-09-01 11:08:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:08:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:08:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3069 transitions. [2023-09-01 11:08:16,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46415607985480944 [2023-09-01 11:08:16,892 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3069 transitions. [2023-09-01 11:08:16,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3069 transitions. [2023-09-01 11:08:16,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:16,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3069 transitions. [2023-09-01 11:08:16,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 255.75) internal successors, (3069), 12 states have internal predecessors, (3069), 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 11:08:16,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 551.0) internal successors, (7163), 13 states have internal predecessors, (7163), 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 11:08:16,910 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 551.0) internal successors, (7163), 13 states have internal predecessors, (7163), 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 11:08:16,910 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 3069 transitions. [2023-09-01 11:08:16,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-09-01 11:08:16,911 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 11:08:16,912 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-09-01 11:08:16,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, 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 11:08:16,913 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -11 predicate places. [2023-09-01 11:08:16,913 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-09-01 11:08:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 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 11:08:16,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:16,915 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:16,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 11:08:17,119 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 11:08:17,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:17,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1643342454, now seen corresponding path program 3 times [2023-09-01 11:08:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893022849] [2023-09-01 11:08:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:17,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:08:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:17,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:08:17,191 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:08:17,192 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:08:17,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:08:17,192 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:08:17,193 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:08:17,193 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:08:17,193 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:08:17,231 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:08:17,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 385 transitions, 800 flow [2023-09-01 11:08:17,332 INFO L130 PetriNetUnfolder]: 168/860 cut-off events. [2023-09-01 11:08:17,332 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:08:17,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 860 events. 168/860 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4631 event pairs, 1 based on Foata normal form. 0/677 useless extension candidates. Maximal degree in co-relation 610. Up to 16 conditions per place. [2023-09-01 11:08:17,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 317 places, 385 transitions, 800 flow [2023-09-01 11:08:17,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 385 transitions, 800 flow [2023-09-01 11:08:17,357 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:08:17,357 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 385 transitions, 800 flow [2023-09-01 11:08:17,357 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 385 transitions, 800 flow [2023-09-01 11:08:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 385 transitions, 800 flow [2023-09-01 11:08:17,453 INFO L130 PetriNetUnfolder]: 168/860 cut-off events. [2023-09-01 11:08:17,453 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:08:17,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 860 events. 168/860 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4631 event pairs, 1 based on Foata normal form. 0/677 useless extension candidates. Maximal degree in co-relation 610. Up to 16 conditions per place. [2023-09-01 11:08:17,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 88596 [2023-09-01 11:08:20,994 INFO L134 LiptonReduction]: Checked pairs total: 155009 [2023-09-01 11:08:20,994 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-09-01 11:08:20,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:08:20,996 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;@55a9e60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:08:20,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:08:21,015 INFO L130 PetriNetUnfolder]: 94/256 cut-off events. [2023-09-01 11:08:21,015 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:08:21,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:21,016 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:21,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:21,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash -918744804, now seen corresponding path program 1 times [2023-09-01 11:08:21,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:21,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816096932] [2023-09-01 11:08:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:21,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:21,045 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 11:08:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816096932] [2023-09-01 11:08:21,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816096932] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:08:21,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:08:21,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:08:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645625099] [2023-09-01 11:08:21,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:08:21,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:08:21,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:08:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:08:21,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 679 [2023-09-01 11:08:21,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 167 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 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 11:08:21,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:21,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 679 [2023-09-01 11:08:21,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:59,889 INFO L130 PetriNetUnfolder]: 477490/661456 cut-off events. [2023-09-01 11:08:59,889 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-09-01 11:09:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274314 conditions, 661456 events. 477490/661456 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14640. Compared 5278701 event pairs, 422085 based on Foata normal form. 116547/658031 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-09-01 11:09:01,606 INFO L137 encePairwiseOnDemand]: 623/679 looper letters, 57 selfloop transitions, 2 changer transitions 43/115 dead transitions. [2023-09-01 11:09:01,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-09-01 11:09:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:09:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:09:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1071 transitions. [2023-09-01 11:09:01,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257731958762887 [2023-09-01 11:09:01,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1071 transitions. [2023-09-01 11:09:01,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1071 transitions. [2023-09-01 11:09:01,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:01,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1071 transitions. [2023-09-01 11:09:01,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 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 11:09:01,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 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 11:09:01,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 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 11:09:01,628 INFO L175 Difference]: Start difference. First operand has 108 places, 167 transitions, 364 flow. Second operand 3 states and 1071 transitions. [2023-09-01 11:09:01,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-09-01 11:09:01,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:09:01,634 INFO L231 Difference]: Finished difference. Result has 111 places, 72 transitions, 175 flow [2023-09-01 11:09:01,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=111, PETRI_TRANSITIONS=72} [2023-09-01 11:09:01,636 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-09-01 11:09:01,636 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 72 transitions, 175 flow [2023-09-01 11:09:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 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 11:09:01,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:01,637 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:09:01,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:01,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1623026964, now seen corresponding path program 1 times [2023-09-01 11:09:01,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:01,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793232844] [2023-09-01 11:09:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:01,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:01,691 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 11:09:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793232844] [2023-09-01 11:09:01,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793232844] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:01,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592664972] [2023-09-01 11:09:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:01,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:01,693 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 11:09:01,697 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 11:09:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:01,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:09:01,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:01,796 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 11:09:01,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:01,813 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 11:09:01,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592664972] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:01,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:01,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:09:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200692546] [2023-09-01 11:09:01,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:09:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:09:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:09:01,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 679 [2023-09-01 11:09:01,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 308.85714285714283) internal successors, (2162), 7 states have internal predecessors, (2162), 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 11:09:01,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:01,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 679 [2023-09-01 11:09:01,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:05,776 INFO L130 PetriNetUnfolder]: 52726/74726 cut-off events. [2023-09-01 11:09:05,776 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2023-09-01 11:09:05,918 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 1958. Compared 500054 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 11:09:06,126 INFO L137 encePairwiseOnDemand]: 676/679 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-09-01 11:09:06,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-09-01 11:09:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:09:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:09:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1907 transitions. [2023-09-01 11:09:06,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680903289150712 [2023-09-01 11:09:06,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1907 transitions. [2023-09-01 11:09:06,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1907 transitions. [2023-09-01 11:09:06,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:06,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1907 transitions. [2023-09-01 11:09:06,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 317.8333333333333) internal successors, (1907), 6 states have internal predecessors, (1907), 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 11:09:06,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 679.0) internal successors, (4753), 7 states have internal predecessors, (4753), 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 11:09:06,143 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 679.0) internal successors, (4753), 7 states have internal predecessors, (4753), 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 11:09:06,143 INFO L175 Difference]: Start difference. First operand has 111 places, 72 transitions, 175 flow. Second operand 6 states and 1907 transitions. [2023-09-01 11:09:06,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-09-01 11:09:06,145 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 11:09:06,146 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-09-01 11:09:06,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, 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 11:09:06,147 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -27 predicate places. [2023-09-01 11:09:06,147 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-09-01 11:09:06,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 308.85714285714283) internal successors, (2162), 7 states have internal predecessors, (2162), 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 11:09:06,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:06,148 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:06,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 11:09:06,353 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 11:09:06,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:06,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash -545848036, now seen corresponding path program 2 times [2023-09-01 11:09:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:06,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655980171] [2023-09-01 11:09:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:06,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:06,440 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 11:09:06,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655980171] [2023-09-01 11:09:06,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655980171] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:06,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110665934] [2023-09-01 11:09:06,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:09:06,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:06,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:06,442 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 11:09:06,469 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 11:09:06,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:09:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:09:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:09:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:06,562 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 11:09:06,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:06,611 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 11:09:06,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110665934] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:06,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:09:06,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102718639] [2023-09-01 11:09:06,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:06,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:09:06,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:09:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:09:06,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 679 [2023-09-01 11:09:06,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 308.46153846153845) internal successors, (4010), 13 states have internal predecessors, (4010), 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 11:09:06,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:06,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 679 [2023-09-01 11:09:06,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:10,756 INFO L130 PetriNetUnfolder]: 52726/74732 cut-off events. [2023-09-01 11:09:10,756 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-09-01 11:09:10,957 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 1957. Compared 499961 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 11:09:11,334 INFO L137 encePairwiseOnDemand]: 676/679 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-09-01 11:09:11,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-09-01 11:09:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:09:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:09:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3758 transitions. [2023-09-01 11:09:11,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46121747668139423 [2023-09-01 11:09:11,343 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3758 transitions. [2023-09-01 11:09:11,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3758 transitions. [2023-09-01 11:09:11,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:11,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3758 transitions. [2023-09-01 11:09:11,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 313.1666666666667) internal successors, (3758), 12 states have internal predecessors, (3758), 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 11:09:11,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 679.0) internal successors, (8827), 13 states have internal predecessors, (8827), 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 11:09:11,363 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 679.0) internal successors, (8827), 13 states have internal predecessors, (8827), 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 11:09:11,363 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3758 transitions. [2023-09-01 11:09:11,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-09-01 11:09:11,365 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 11:09:11,366 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-09-01 11:09:11,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, 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 11:09:11,367 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -11 predicate places. [2023-09-01 11:09:11,367 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-09-01 11:09:11,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 308.46153846153845) internal successors, (4010), 13 states have internal predecessors, (4010), 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 11:09:11,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:11,368 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:11,375 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 11:09:11,573 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 11:09:11,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:11,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash 829240092, now seen corresponding path program 3 times [2023-09-01 11:09:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:11,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569207197] [2023-09-01 11:09:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:11,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:09:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:11,615 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:09:11,615 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:09:11,615 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:09:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:09:11,615 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:09:11,616 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:09:11,616 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:09:11,616 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:09:11,649 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:09:11,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 456 transitions, 956 flow [2023-09-01 11:09:11,806 INFO L130 PetriNetUnfolder]: 230/1182 cut-off events. [2023-09-01 11:09:11,807 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:09:11,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 1182 events. 230/1182 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6634 event pairs, 6 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 880. Up to 32 conditions per place. [2023-09-01 11:09:11,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 456 transitions, 956 flow [2023-09-01 11:09:11,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 456 transitions, 956 flow [2023-09-01 11:09:11,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:11,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 456 transitions, 956 flow [2023-09-01 11:09:11,844 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 456 transitions, 956 flow [2023-09-01 11:09:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 456 transitions, 956 flow [2023-09-01 11:09:11,978 INFO L130 PetriNetUnfolder]: 230/1182 cut-off events. [2023-09-01 11:09:11,978 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:09:11,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 1182 events. 230/1182 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6634 event pairs, 6 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 880. Up to 32 conditions per place. [2023-09-01 11:09:12,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 138000 [2023-09-01 11:09:15,668 INFO L134 LiptonReduction]: Checked pairs total: 244685 [2023-09-01 11:09:15,668 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-09-01 11:09:15,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:15,673 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;@55a9e60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:15,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:15,917 INFO L130 PetriNetUnfolder]: 134/361 cut-off events. [2023-09-01 11:09:15,917 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:09:15,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:15,918 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:15,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:15,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1617637136, now seen corresponding path program 1 times [2023-09-01 11:09:15,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:15,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770208803] [2023-09-01 11:09:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:15,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:15,944 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 11:09:15,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:15,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770208803] [2023-09-01 11:09:15,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770208803] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:15,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:15,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:15,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42131772] [2023-09-01 11:09:15,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:15,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:15,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:15,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 798 [2023-09-01 11:09:15,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 199 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 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 11:09:15,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:15,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 798 [2023-09-01 11:09:15,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand