./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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_28-funptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:52:51,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:52:51,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:52:51,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:52:51,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:52:51,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:52:51,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:52:51,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:52:51,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:52:51,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:52:51,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:52:51,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:52:51,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:52:51,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:52:51,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:52:51,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:52:51,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:52:51,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:52:51,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:52:51,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:52:51,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:52:51,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:52:51,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:52:51,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:52:51,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:52:51,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:52:51,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:52:51,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:52:51,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:52:51,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:52:51,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:52:51,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:52:51,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:52:51,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:52:51,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:52:51,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:52:51,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:52:51,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:52:51,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:52:51,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:52:51,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:52:51,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:52:51,907 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:52:51,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:52:51,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:52:51,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:52:51,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:52:51,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:52:51,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:52:51,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:52:51,910 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:52:51,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:52:51,911 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:52:51,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:52:51,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:52:51,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:52:51,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:52:51,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:52:51,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:52:51,912 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:52:51,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:52:51,913 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:52:51,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:52:51,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:52:51,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:52:51,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:52:51,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:52:51,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:52:51,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:52:51,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:52:51,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:52:51,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:52:51,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:52:51,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:52:51,916 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:52:51,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:52:51,916 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:52:51,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:52:52,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:52:52,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:52:52,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:52:52,241 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:52:52,241 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:52:52,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-08-30 17:52:53,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:52:53,833 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:52:53,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-08-30 17:52:53,847 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50d28948e/8764cbf4f39549599d2cdd7e8466be4c/FLAG3d8a99be9 [2023-08-30 17:52:53,858 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50d28948e/8764cbf4f39549599d2cdd7e8466be4c [2023-08-30 17:52:53,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:52:53,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:52:53,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:52:53,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:52:53,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:52:53,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:52:53" (1/1) ... [2023-08-30 17:52:53,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd9f8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:53, skipping insertion in model container [2023-08-30 17:52:53,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:52:53" (1/1) ... [2023-08-30 17:52:53,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:52:53,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:52:54,310 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_28-funptr_racefree.i[41323,41336] [2023-08-30 17:52:54,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:52:54,350 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:52:54,388 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_28-funptr_racefree.i[41323,41336] [2023-08-30 17:52:54,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:52:54,472 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 17:52:54,478 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:52:54,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54 WrapperNode [2023-08-30 17:52:54,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:52:54,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:52:54,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:52:54,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:52:54,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,546 INFO L138 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-08-30 17:52:54,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:52:54,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:52:54,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:52:54,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:52:54,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,592 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:52:54,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:52:54,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:52:54,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:52:54,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (1/1) ... [2023-08-30 17:52:54,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:52:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:54,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 17:52:54,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 17:52:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:52:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:52:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:52:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:52:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:52:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:52:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:52:54,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:52:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:52:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:52:54,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:52:54,671 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:52:54,821 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:52:54,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:52:54,994 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:52:55,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:52:55,020 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:52:55,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:52:55 BoogieIcfgContainer [2023-08-30 17:52:55,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:52:55,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:52:55,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:52:55,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:52:55,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:52:53" (1/3) ... [2023-08-30 17:52:55,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48fece92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:52:55, skipping insertion in model container [2023-08-30 17:52:55,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:54" (2/3) ... [2023-08-30 17:52:55,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48fece92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:52:55, skipping insertion in model container [2023-08-30 17:52:55,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:52:55" (3/3) ... [2023-08-30 17:52:55,029 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2023-08-30 17:52:55,036 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:52:55,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:52:55,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:52:55,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:52:55,097 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:52:55,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-08-30 17:52:55,188 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2023-08-30 17:52:55,188 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:55,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 352 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-30 17:52:55,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-08-30 17:52:55,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:55,204 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:55,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:55,228 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:55,257 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2023-08-30 17:52:55,257 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:55,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-30 17:52:55,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 3096 [2023-08-30 17:52:58,311 INFO L134 LiptonReduction]: Checked pairs total: 6627 [2023-08-30 17:52:58,312 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-30 17:52:58,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:58,345 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;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:58,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:58,356 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-08-30 17:52:58,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:58,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:58,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:58,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:58,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash 111801901, now seen corresponding path program 1 times [2023-08-30 17:52:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669772820] [2023-08-30 17:52:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:58,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669772820] [2023-08-30 17:52:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669772820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:58,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:52:58,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708328172] [2023-08-30 17:52:58,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:58,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:58,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:58,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:58,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-30 17:52:58,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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) [2023-08-30 17:52:58,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:58,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-30 17:52:58,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:58,824 INFO L130 PetriNetUnfolder]: 110/256 cut-off events. [2023-08-30 17:52:58,824 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:58,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 256 events. 110/256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 915 event pairs, 90 based on Foata normal form. 12/246 useless extension candidates. Maximal degree in co-relation 492. Up to 232 conditions per place. [2023-08-30 17:52:58,830 INFO L137 encePairwiseOnDemand]: 198/210 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2023-08-30 17:52:58,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 149 flow [2023-08-30 17:52:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-30 17:52:58,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603174603174603 [2023-08-30 17:52:58,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-30 17:52:58,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-30 17:52:58,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:58,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-30 17:52:58,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-08-30 17:52:58,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-30 17:52:58,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-30 17:52:58,867 INFO L175 Difference]: Start difference. First operand has 31 places, 36 transitions, 77 flow. Second operand 3 states and 353 transitions. [2023-08-30 17:52:58,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 149 flow [2023-08-30 17:52:58,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:58,872 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 55 flow [2023-08-30 17:52:58,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-30 17:52:58,877 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-30 17:52:58,877 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 55 flow [2023-08-30 17:52:58,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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) [2023-08-30 17:52:58,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:58,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:58,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:52:58,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:58,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2053117344, now seen corresponding path program 1 times [2023-08-30 17:52:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:58,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387398961] [2023-08-30 17:52:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387398961] [2023-08-30 17:52:59,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387398961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59212388] [2023-08-30 17:52:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:59,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:59,029 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) [2023-08-30 17:52:59,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:52:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:59,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:59,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:59,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59212388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:59,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:59,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:52:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084666570] [2023-08-30 17:52:59,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:52:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:52:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:52:59,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 210 [2023-08-30 17:52:59,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 55 flow. Second operand has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 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) [2023-08-30 17:52:59,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:59,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 210 [2023-08-30 17:52:59,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:59,311 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2023-08-30 17:52:59,311 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:52:59,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 104 event pairs, 0 based on Foata normal form. 11/68 useless extension candidates. Maximal degree in co-relation 128. Up to 42 conditions per place. [2023-08-30 17:52:59,312 INFO L137 encePairwiseOnDemand]: 207/210 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-30 17:52:59,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 113 flow [2023-08-30 17:52:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:52:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:52:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2023-08-30 17:52:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2023-08-30 17:52:59,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2023-08-30 17:52:59,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2023-08-30 17:52:59,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:59,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2023-08-30 17:52:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 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) [2023-08-30 17:52:59,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-30 17:52:59,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-30 17:52:59,319 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 55 flow. Second operand 4 states and 426 transitions. [2023-08-30 17:52:59,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 113 flow [2023-08-30 17:52:59,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:52:59,320 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-30 17:52:59,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-30 17:52:59,321 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -9 predicate places. [2023-08-30 17:52:59,321 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-30 17:52:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 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) [2023-08-30 17:52:59,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:59,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:52:59,530 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 [2023-08-30 17:52:59,531 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:52:59,533 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-08-30 17:52:59,556 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2023-08-30 17:52:59,557 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 352 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-30 17:52:59,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-08-30 17:52:59,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:59,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:59,559 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:59,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-08-30 17:52:59,573 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2023-08-30 17:52:59,575 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:59,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-30 17:52:59,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 3096 [2023-08-30 17:53:02,305 INFO L134 LiptonReduction]: Checked pairs total: 6627 [2023-08-30 17:53:02,305 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-30 17:53:02,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:53:02,308 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;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:02,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:02,310 INFO L130 PetriNetUnfolder]: 0/16 cut-off events. [2023-08-30 17:53:02,310 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:53:02,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:02,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:53:02,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:53:02,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:02,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1175112813, now seen corresponding path program 1 times [2023-08-30 17:53:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:02,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402596497] [2023-08-30 17:53:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:02,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:53:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:02,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:53:02,403 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:53:02,403 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:53:02,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:53:02,403 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:53:02,404 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:53:02,405 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:53:02,405 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:53:02,430 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:53:02,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:02,461 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-08-30 17:53:02,462 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:53:02,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 17:53:02,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:02,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:02,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:53:02,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:02,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:02,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:02,489 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-08-30 17:53:02,489 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:53:02,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 17:53:02,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 9576 [2023-08-30 17:53:05,301 INFO L134 LiptonReduction]: Checked pairs total: 23645 [2023-08-30 17:53:05,301 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-30 17:53:05,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:53:05,306 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;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:05,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:05,308 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-08-30 17:53:05,309 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:53:05,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:05,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:53:05,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:53:05,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1090981270, now seen corresponding path program 1 times [2023-08-30 17:53:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886004302] [2023-08-30 17:53:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:05,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:53:05,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886004302] [2023-08-30 17:53:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886004302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:53:05,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:53:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:53:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924837112] [2023-08-30 17:53:05,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:53:05,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:53:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:53:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:53:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:53:05,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 268 [2023-08-30 17:53:05,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-08-30 17:53:05,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:53:05,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 268 [2023-08-30 17:53:05,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:53:05,886 INFO L130 PetriNetUnfolder]: 3209/5651 cut-off events. [2023-08-30 17:53:05,886 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 17:53:05,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 5651 events. 3209/5651 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 35826 event pairs, 1480 based on Foata normal form. 634/5792 useless extension candidates. Maximal degree in co-relation 857. Up to 5130 conditions per place. [2023-08-30 17:53:05,941 INFO L137 encePairwiseOnDemand]: 251/268 looper letters, 42 selfloop transitions, 2 changer transitions 10/63 dead transitions. [2023-08-30 17:53:05,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 248 flow [2023-08-30 17:53:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:53:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:53:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-30 17:53:05,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796019900497512 [2023-08-30 17:53:05,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-30 17:53:05,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-30 17:53:05,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:53:05,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-30 17:53:05,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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) [2023-08-30 17:53:05,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-30 17:53:05,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-30 17:53:05,947 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 146 flow. Second operand 3 states and 466 transitions. [2023-08-30 17:53:05,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 248 flow [2023-08-30 17:53:05,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:53:05,950 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 100 flow [2023-08-30 17:53:05,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-30 17:53:05,951 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-30 17:53:05,951 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 100 flow [2023-08-30 17:53:05,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-08-30 17:53:05,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:05,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:53:05,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:53:05,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:53:05,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -438800581, now seen corresponding path program 1 times [2023-08-30 17:53:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160692711] [2023-08-30 17:53:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:05,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:53:05,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160692711] [2023-08-30 17:53:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160692711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:53:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198822329] [2023-08-30 17:53:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:05,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:53:05,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:53:05,990 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) [2023-08-30 17:53:06,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:53:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:53:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:53:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:06,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:53:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:06,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198822329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:53:06,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:53:06,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:53:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95730550] [2023-08-30 17:53:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:53:06,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:53:06,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:53:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:53:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:53:06,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 268 [2023-08-30 17:53:06,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 132.57142857142858) internal successors, (928), 7 states have internal predecessors, (928), 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) [2023-08-30 17:53:06,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:53:06,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 268 [2023-08-30 17:53:06,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:53:06,277 INFO L130 PetriNetUnfolder]: 625/1135 cut-off events. [2023-08-30 17:53:06,277 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 17:53:06,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2395 conditions, 1135 events. 625/1135 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5525 event pairs, 60 based on Foata normal form. 144/1266 useless extension candidates. Maximal degree in co-relation 199. Up to 746 conditions per place. [2023-08-30 17:53:06,280 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 0 selfloop transitions, 0 changer transitions 69/69 dead transitions. [2023-08-30 17:53:06,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 276 flow [2023-08-30 17:53:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:53:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:53:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 713 transitions. [2023-08-30 17:53:06,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320895522388059 [2023-08-30 17:53:06,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 713 transitions. [2023-08-30 17:53:06,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 713 transitions. [2023-08-30 17:53:06,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:53:06,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 713 transitions. [2023-08-30 17:53:06,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 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) [2023-08-30 17:53:06,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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) [2023-08-30 17:53:06,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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) [2023-08-30 17:53:06,289 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 100 flow. Second operand 5 states and 713 transitions. [2023-08-30 17:53:06,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 276 flow [2023-08-30 17:53:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 69 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:53:06,291 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-30 17:53:06,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-30 17:53:06,292 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-08-30 17:53:06,292 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-30 17:53:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.57142857142858) internal successors, (928), 7 states have internal predecessors, (928), 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) [2023-08-30 17:53:06,293 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:53:06,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 17:53:06,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:53:06,499 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:53:06,500 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:53:06,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:06,521 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-08-30 17:53:06,522 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:53:06,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 17:53:06,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:06,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:06,525 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:53:06,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:06,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:06,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:53:06,545 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-08-30 17:53:06,545 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:53:06,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 17:53:06,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 9576 [2023-08-30 17:53:09,049 INFO L134 LiptonReduction]: Checked pairs total: 23719 [2023-08-30 17:53:09,049 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-30 17:53:09,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:53:09,055 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;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:09,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:09,060 INFO L130 PetriNetUnfolder]: 8/58 cut-off events. [2023-08-30 17:53:09,061 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:53:09,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:09,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:53:09,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:53:09,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1880328137, now seen corresponding path program 1 times [2023-08-30 17:53:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135738779] [2023-08-30 17:53:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:09,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:53:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:09,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:53:09,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:53:09,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:53:09,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:53:09,087 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:53:09,088 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:53:09,088 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:53:09,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:53:09,105 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:53:09,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:09,137 INFO L130 PetriNetUnfolder]: 50/385 cut-off events. [2023-08-30 17:53:09,138 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:53:09,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 385 events. 50/385 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1323 event pairs, 1 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-08-30 17:53:09,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:09,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:09,143 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:53:09,143 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:09,144 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:09,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:09,182 INFO L130 PetriNetUnfolder]: 50/385 cut-off events. [2023-08-30 17:53:09,183 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:53:09,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 385 events. 50/385 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1323 event pairs, 1 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-08-30 17:53:09,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 18576 [2023-08-30 17:53:11,807 INFO L134 LiptonReduction]: Checked pairs total: 49222 [2023-08-30 17:53:11,808 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-30 17:53:11,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:53:11,810 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:11,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:11,812 INFO L130 PetriNetUnfolder]: 1/19 cut-off events. [2023-08-30 17:53:11,812 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:53:11,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:11,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:53:11,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:53:11,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -397533553, now seen corresponding path program 1 times [2023-08-30 17:53:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:11,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222479919] [2023-08-30 17:53:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:53:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222479919] [2023-08-30 17:53:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222479919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:53:11,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:53:11,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:53:11,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60471079] [2023-08-30 17:53:11,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:53:11,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:53:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:53:11,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:53:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:53:11,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 326 [2023-08-30 17:53:11,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 88 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2023-08-30 17:53:11,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:53:11,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 326 [2023-08-30 17:53:11,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:53:17,092 INFO L130 PetriNetUnfolder]: 46217/70776 cut-off events. [2023-08-30 17:53:17,093 INFO L131 PetriNetUnfolder]: For 1319/1319 co-relation queries the response was YES. [2023-08-30 17:53:17,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136391 conditions, 70776 events. 46217/70776 cut-off events. For 1319/1319 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 544743 event pairs, 40082 based on Foata normal form. 11264/76968 useless extension candidates. Maximal degree in co-relation 57675. Up to 64618 conditions per place. [2023-08-30 17:53:17,393 INFO L137 encePairwiseOnDemand]: 302/326 looper letters, 51 selfloop transitions, 2 changer transitions 11/79 dead transitions. [2023-08-30 17:53:17,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 312 flow [2023-08-30 17:53:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:53:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:53:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-30 17:53:17,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858895705521472 [2023-08-30 17:53:17,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-30 17:53:17,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-30 17:53:17,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:53:17,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-30 17:53:17,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 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) [2023-08-30 17:53:17,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 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) [2023-08-30 17:53:17,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 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) [2023-08-30 17:53:17,402 INFO L175 Difference]: Start difference. First operand has 71 places, 88 transitions, 206 flow. Second operand 3 states and 573 transitions. [2023-08-30 17:53:17,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 312 flow [2023-08-30 17:53:17,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:53:17,407 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 137 flow [2023-08-30 17:53:17,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=137, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-30 17:53:17,409 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2023-08-30 17:53:17,410 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 137 flow [2023-08-30 17:53:17,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2023-08-30 17:53:17,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:17,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:53:17,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:53:17,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:53:17,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1648950682, now seen corresponding path program 1 times [2023-08-30 17:53:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934927193] [2023-08-30 17:53:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:17,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:53:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934927193] [2023-08-30 17:53:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934927193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:53:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458823071] [2023-08-30 17:53:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:17,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:53:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:53:17,469 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) [2023-08-30 17:53:17,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:53:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:53:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:53:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:53:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:17,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458823071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:53:17,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:53:17,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:53:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768815439] [2023-08-30 17:53:17,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:53:17,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:53:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:53:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:53:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:53:17,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 326 [2023-08-30 17:53:17,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 137 flow. Second operand has 7 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 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) [2023-08-30 17:53:17,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:53:17,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 326 [2023-08-30 17:53:17,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:53:18,449 INFO L130 PetriNetUnfolder]: 9268/13930 cut-off events. [2023-08-30 17:53:18,449 INFO L131 PetriNetUnfolder]: For 1920/1920 co-relation queries the response was YES. [2023-08-30 17:53:18,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29066 conditions, 13930 events. 9268/13930 cut-off events. For 1920/1920 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 87433 event pairs, 792 based on Foata normal form. 1332/15238 useless extension candidates. Maximal degree in co-relation 2472. Up to 8920 conditions per place. [2023-08-30 17:53:18,485 INFO L137 encePairwiseOnDemand]: 323/326 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-08-30 17:53:18,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 114 transitions, 453 flow [2023-08-30 17:53:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:53:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:53:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1063 transitions. [2023-08-30 17:53:18,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434560327198364 [2023-08-30 17:53:18,491 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1063 transitions. [2023-08-30 17:53:18,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1063 transitions. [2023-08-30 17:53:18,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:53:18,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1063 transitions. [2023-08-30 17:53:18,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 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) [2023-08-30 17:53:18,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 326.0) internal successors, (2282), 7 states have internal predecessors, (2282), 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) [2023-08-30 17:53:18,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 326.0) internal successors, (2282), 7 states have internal predecessors, (2282), 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) [2023-08-30 17:53:18,504 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 137 flow. Second operand 6 states and 1063 transitions. [2023-08-30 17:53:18,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 114 transitions, 453 flow [2023-08-30 17:53:18,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 449 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:53:18,513 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-08-30 17:53:18,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2023-08-30 17:53:18,515 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -8 predicate places. [2023-08-30 17:53:18,516 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-08-30 17:53:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 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) [2023-08-30 17:53:18,517 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:53:18,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 17:53:18,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:53:18,726 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:53:18,726 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:53:18,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:18,763 INFO L130 PetriNetUnfolder]: 50/385 cut-off events. [2023-08-30 17:53:18,763 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:53:18,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 385 events. 50/385 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1323 event pairs, 1 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-08-30 17:53:18,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:18,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:18,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:53:18,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:18,768 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:18,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 195 transitions, 420 flow [2023-08-30 17:53:18,797 INFO L130 PetriNetUnfolder]: 50/385 cut-off events. [2023-08-30 17:53:18,797 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:53:18,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 385 events. 50/385 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1323 event pairs, 1 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-08-30 17:53:18,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 18576 [2023-08-30 17:53:21,317 INFO L134 LiptonReduction]: Checked pairs total: 49384 [2023-08-30 17:53:21,317 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-30 17:53:21,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:53:21,318 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:21,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:21,325 INFO L130 PetriNetUnfolder]: 17/97 cut-off events. [2023-08-30 17:53:21,326 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:53:21,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:21,326 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:53:21,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:53:21,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash 202808789, now seen corresponding path program 1 times [2023-08-30 17:53:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:21,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988231316] [2023-08-30 17:53:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:21,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:21,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:53:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:21,371 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:53:21,372 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:53:21,372 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:53:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:53:21,372 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:53:21,374 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:53:21,374 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:53:21,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:53:21,405 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:53:21,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 233 transitions, 510 flow [2023-08-30 17:53:21,471 INFO L130 PetriNetUnfolder]: 81/579 cut-off events. [2023-08-30 17:53:21,471 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:53:21,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 579 events. 81/579 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2023-08-30 17:53:21,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 233 transitions, 510 flow [2023-08-30 17:53:21,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 233 transitions, 510 flow [2023-08-30 17:53:21,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:53:21,483 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 233 transitions, 510 flow [2023-08-30 17:53:21,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 233 transitions, 510 flow [2023-08-30 17:53:21,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 233 transitions, 510 flow [2023-08-30 17:53:21,540 INFO L130 PetriNetUnfolder]: 81/579 cut-off events. [2023-08-30 17:53:21,541 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:53:21,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 579 events. 81/579 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2023-08-30 17:53:21,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 30384 [2023-08-30 17:53:24,359 INFO L134 LiptonReduction]: Checked pairs total: 85068 [2023-08-30 17:53:24,359 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-30 17:53:24,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:53:24,361 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;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:24,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:24,363 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-08-30 17:53:24,364 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:53:24,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:24,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:53:24,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:53:24,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1431556493, now seen corresponding path program 1 times [2023-08-30 17:53:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917495687] [2023-08-30 17:53:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:24,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:53:24,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:53:24,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917495687] [2023-08-30 17:53:24,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917495687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:53:24,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:53:24,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:53:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485903079] [2023-08-30 17:53:24,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:53:24,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:53:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:53:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:53:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:53:24,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 386 [2023-08-30 17:53:24,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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) [2023-08-30 17:53:24,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:53:24,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 386 [2023-08-30 17:53:24,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:31,956 INFO L130 PetriNetUnfolder]: 708182/992568 cut-off events. [2023-08-30 17:54:31,956 INFO L131 PetriNetUnfolder]: For 26263/26263 co-relation queries the response was YES. [2023-08-30 17:54:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1924111 conditions, 992568 events. 708182/992568 cut-off events. For 26263/26263 co-relation queries the response was YES. Maximal size of possible extension queue 17192. Compared 8489043 event pairs, 524676 based on Foata normal form. 184338/1118746 useless extension candidates. Maximal degree in co-relation 150818. Up to 916877 conditions per place. [2023-08-30 17:54:36,325 INFO L137 encePairwiseOnDemand]: 357/386 looper letters, 60 selfloop transitions, 2 changer transitions 12/93 dead transitions. [2023-08-30 17:54:36,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 374 flow [2023-08-30 17:54:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-08-30 17:54:36,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854922279792746 [2023-08-30 17:54:36,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-08-30 17:54:36,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-08-30 17:54:36,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:36,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-08-30 17:54:36,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 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) [2023-08-30 17:54:36,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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) [2023-08-30 17:54:36,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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) [2023-08-30 17:54:36,332 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 260 flow. Second operand 3 states and 678 transitions. [2023-08-30 17:54:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 374 flow [2023-08-30 17:54:36,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:36,343 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 176 flow [2023-08-30 17:54:36,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2023-08-30 17:54:36,343 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-30 17:54:36,343 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 176 flow [2023-08-30 17:54:36,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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) [2023-08-30 17:54:36,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:36,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:36,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:54:36,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:36,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1037325255, now seen corresponding path program 1 times [2023-08-30 17:54:36,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:36,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554737027] [2023-08-30 17:54:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:36,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554737027] [2023-08-30 17:54:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554737027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695634663] [2023-08-30 17:54:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:36,379 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) [2023-08-30 17:54:36,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:54:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:36,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:36,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695634663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:36,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:54:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98954836] [2023-08-30 17:54:36,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:36,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:54:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:54:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:54:36,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 386 [2023-08-30 17:54:36,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 192.57142857142858) internal successors, (1348), 7 states have internal predecessors, (1348), 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) [2023-08-30 17:54:36,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:36,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 386 [2023-08-30 17:54:36,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:21,291 INFO L130 PetriNetUnfolder]: 381099/519224 cut-off events. [2023-08-30 17:55:21,291 INFO L131 PetriNetUnfolder]: For 22912/22912 co-relation queries the response was YES. [2023-08-30 17:55:22,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045176 conditions, 519224 events. 381099/519224 cut-off events. For 22912/22912 co-relation queries the response was YES. Maximal size of possible extension queue 9845. Compared 4060684 event pairs, 11952 based on Foata normal form. 1440/520659 useless extension candidates. Maximal degree in co-relation 724970. Up to 366361 conditions per place. [2023-08-30 17:55:24,224 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 149 selfloop transitions, 5 changer transitions 1/174 dead transitions. [2023-08-30 17:55:24,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 174 transitions, 696 flow [2023-08-30 17:55:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:55:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:55:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1298 transitions. [2023-08-30 17:55:24,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604490500863558 [2023-08-30 17:55:24,227 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1298 transitions. [2023-08-30 17:55:24,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1298 transitions. [2023-08-30 17:55:24,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:24,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1298 transitions. [2023-08-30 17:55:24,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 216.33333333333334) internal successors, (1298), 6 states have internal predecessors, (1298), 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) [2023-08-30 17:55:24,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 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) [2023-08-30 17:55:24,233 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 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) [2023-08-30 17:55:24,233 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 176 flow. Second operand 6 states and 1298 transitions. [2023-08-30 17:55:24,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 174 transitions, 696 flow [2023-08-30 17:55:24,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 174 transitions, 688 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:55:24,248 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 202 flow [2023-08-30 17:55:24,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-08-30 17:55:24,249 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-30 17:55:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 202 flow [2023-08-30 17:55:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 192.57142857142858) internal successors, (1348), 7 states have internal predecessors, (1348), 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) [2023-08-30 17:55:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:24,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 17:55:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:24,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:24,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2010055803, now seen corresponding path program 1 times [2023-08-30 17:55:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:24,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810084370] [2023-08-30 17:55:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 17:55:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810084370] [2023-08-30 17:55:24,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810084370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:24,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:24,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:55:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861238927] [2023-08-30 17:55:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:24,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:24,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:24,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 386 [2023-08-30 17:55:24,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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) [2023-08-30 17:55:24,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:24,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 386 [2023-08-30 17:55:24,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:56:01,801 INFO L130 PetriNetUnfolder]: 438130/584880 cut-off events. [2023-08-30 17:56:01,801 INFO L131 PetriNetUnfolder]: For 294902/294902 co-relation queries the response was YES. [2023-08-30 17:56:03,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283324 conditions, 584880 events. 438130/584880 cut-off events. For 294902/294902 co-relation queries the response was YES. Maximal size of possible extension queue 10409. Compared 4283382 event pairs, 161602 based on Foata normal form. 900/585130 useless extension candidates. Maximal degree in co-relation 1047088. Up to 540103 conditions per place. [2023-08-30 17:56:05,820 INFO L137 encePairwiseOnDemand]: 380/386 looper letters, 86 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2023-08-30 17:56:05,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 107 transitions, 500 flow [2023-08-30 17:56:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:56:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:56:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 17:56:05,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561312607944733 [2023-08-30 17:56:05,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 17:56:05,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 17:56:05,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:56:05,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 17:56:05,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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) [2023-08-30 17:56:05,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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) [2023-08-30 17:56:05,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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) [2023-08-30 17:56:05,829 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 202 flow. Second operand 3 states and 644 transitions. [2023-08-30 17:56:05,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 107 transitions, 500 flow [2023-08-30 17:56:05,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 107 transitions, 480 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 17:56:05,987 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 224 flow [2023-08-30 17:56:05,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2023-08-30 17:56:05,988 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-30 17:56:05,988 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 224 flow [2023-08-30 17:56:05,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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) [2023-08-30 17:56:05,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:05,988 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:56:05,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 17:56:05,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:56:05,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1950143490, now seen corresponding path program 1 times [2023-08-30 17:56:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328558259] [2023-08-30 17:56:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:56:06,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:56:06,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328558259] [2023-08-30 17:56:06,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328558259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:56:06,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199099802] [2023-08-30 17:56:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:06,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:56:06,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:56:06,086 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) [2023-08-30 17:56:06,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:56:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:56:06,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:56:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:56:06,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:56:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:56:06,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199099802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:56:06,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:56:06,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:56:06,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267363720] [2023-08-30 17:56:06,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:56:06,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:56:06,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:56:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:56:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:56:06,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 386 [2023-08-30 17:56:06,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 224 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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) [2023-08-30 17:56:06,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:56:06,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 386 [2023-08-30 17:56:06,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:56:15,561 INFO L130 PetriNetUnfolder]: 99809/142193 cut-off events. [2023-08-30 17:56:15,562 INFO L131 PetriNetUnfolder]: For 99171/99171 co-relation queries the response was YES. [2023-08-30 17:56:16,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308825 conditions, 142193 events. 99809/142193 cut-off events. For 99171/99171 co-relation queries the response was YES. Maximal size of possible extension queue 2983. Compared 1056676 event pairs, 72 based on Foata normal form. 14340/156528 useless extension candidates. Maximal degree in co-relation 219962. Up to 65354 conditions per place. [2023-08-30 17:56:16,151 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 0 selfloop transitions, 0 changer transitions 177/177 dead transitions. [2023-08-30 17:56:16,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 177 transitions, 766 flow [2023-08-30 17:56:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:56:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:56:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1480 transitions. [2023-08-30 17:56:16,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477424130273871 [2023-08-30 17:56:16,156 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1480 transitions. [2023-08-30 17:56:16,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1480 transitions. [2023-08-30 17:56:16,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:56:16,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1480 transitions. [2023-08-30 17:56:16,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 211.42857142857142) internal successors, (1480), 7 states have internal predecessors, (1480), 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) [2023-08-30 17:56:16,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 386.0) internal successors, (3088), 8 states have internal predecessors, (3088), 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) [2023-08-30 17:56:16,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 386.0) internal successors, (3088), 8 states have internal predecessors, (3088), 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) [2023-08-30 17:56:16,165 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 224 flow. Second operand 7 states and 1480 transitions. [2023-08-30 17:56:16,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 177 transitions, 766 flow [2023-08-30 17:56:16,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 177 transitions, 747 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 17:56:16,216 INFO L231 Difference]: Finished difference. Result has 85 places, 0 transitions, 0 flow [2023-08-30 17:56:16,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=85, PETRI_TRANSITIONS=0} [2023-08-30 17:56:16,217 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -2 predicate places. [2023-08-30 17:56:16,217 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 0 transitions, 0 flow [2023-08-30 17:56:16,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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) [2023-08-30 17:56:16,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:56:16,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:56:16,423 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,SelfDestructingSolverStorable12 [2023-08-30 17:56:16,424 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 17:56:16,425 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:56:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 233 transitions, 510 flow [2023-08-30 17:56:16,464 INFO L130 PetriNetUnfolder]: 81/579 cut-off events. [2023-08-30 17:56:16,464 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:56:16,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 579 events. 81/579 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2023-08-30 17:56:16,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 233 transitions, 510 flow [2023-08-30 17:56:16,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 233 transitions, 510 flow [2023-08-30 17:56:16,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:56:16,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 233 transitions, 510 flow [2023-08-30 17:56:16,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 233 transitions, 510 flow [2023-08-30 17:56:16,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 233 transitions, 510 flow [2023-08-30 17:56:16,511 INFO L130 PetriNetUnfolder]: 81/579 cut-off events. [2023-08-30 17:56:16,512 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:56:16,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 579 events. 81/579 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2023-08-30 17:56:16,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 30384 [2023-08-30 17:56:19,329 INFO L134 LiptonReduction]: Checked pairs total: 85286 [2023-08-30 17:56:19,330 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-30 17:56:19,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:56:19,331 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:56:19,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:56:19,337 INFO L130 PetriNetUnfolder]: 22/129 cut-off events. [2023-08-30 17:56:19,338 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 17:56:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:56:19,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:56:19,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -818481773, now seen corresponding path program 1 times [2023-08-30 17:56:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780759565] [2023-08-30 17:56:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:56:19,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:56:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:56:19,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:56:19,367 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:56:19,367 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:56:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 17:56:19,367 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:56:19,368 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:56:19,368 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:56:19,368 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:56:19,389 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:56:19,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 602 flow [2023-08-30 17:56:19,487 INFO L130 PetriNetUnfolder]: 140/905 cut-off events. [2023-08-30 17:56:19,488 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:56:19,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 905 events. 140/905 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4184 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 624. Up to 80 conditions per place. [2023-08-30 17:56:19,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 271 transitions, 602 flow [2023-08-30 17:56:19,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 271 transitions, 602 flow [2023-08-30 17:56:19,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:56:19,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 271 transitions, 602 flow [2023-08-30 17:56:19,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 271 transitions, 602 flow [2023-08-30 17:56:19,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 602 flow [2023-08-30 17:56:19,583 INFO L130 PetriNetUnfolder]: 140/905 cut-off events. [2023-08-30 17:56:19,583 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:56:19,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 905 events. 140/905 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4184 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 624. Up to 80 conditions per place. [2023-08-30 17:56:19,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 45000 [2023-08-30 17:56:22,471 INFO L134 LiptonReduction]: Checked pairs total: 129505 [2023-08-30 17:56:22,471 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-30 17:56:22,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:56:22,472 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;@48ec9752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:56:22,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:56:22,474 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-08-30 17:56:22,474 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:56:22,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:22,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:56:22,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:56:22,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash 224241682, now seen corresponding path program 1 times [2023-08-30 17:56:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:22,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440607739] [2023-08-30 17:56:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:56:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:56:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440607739] [2023-08-30 17:56:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440607739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:56:22,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:56:22,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:56:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524877225] [2023-08-30 17:56:22,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:56:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:56:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:56:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:56:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:56:22,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 445 [2023-08-30 17:56:22,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2023-08-30 17:56:22,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:56:22,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 445 [2023-08-30 17:56:22,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand