./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.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_27-funptr_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --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 17:52:07,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:52:07,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:52:07,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:52:07,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:52:07,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:52:07,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:52:07,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:52:07,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:52:07,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:52:07,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:52:07,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:52:07,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:52:07,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:52:07,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:52:07,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:52:07,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:52:07,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:52:07,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:52:07,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:52:07,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:52:07,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:52:07,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:52:07,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:52:07,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:52:07,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:52:07,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:52:07,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:52:07,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:52:07,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:52:07,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:52:07,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:52:07,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:52:07,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:52:07,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:52:07,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:52:07,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:52:07,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:52:07,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:52:07,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:52:07,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:52:08,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:52:08,022 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:52:08,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:52:08,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:52:08,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:52:08,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:52:08,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:52:08,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:52:08,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:52:08,025 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:52:08,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:52:08,025 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:52:08,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:52:08,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:52:08,027 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:52:08,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:52:08,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:52:08,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:52:08,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:52:08,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:52:08,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:52:08,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:52:08,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:52:08,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:52:08,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:52:08,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:52:08,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:52:08,029 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:52:08,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:52:08,029 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:52:08,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:52:08,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:52:08,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:52:08,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:52:08,278 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:52:08,278 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:52:08,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-30 17:52:09,256 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:52:09,615 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:52:09,616 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-30 17:52:09,647 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e7461f6/e293b932fd5d4e28bff2219156bb7f61/FLAG19a9c96e1 [2023-08-30 17:52:09,662 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e7461f6/e293b932fd5d4e28bff2219156bb7f61 [2023-08-30 17:52:09,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:52:09,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:52:09,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:52:09,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:52:09,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:52:09,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:52:09" (1/1) ... [2023-08-30 17:52:09,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a47ef4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:09, skipping insertion in model container [2023-08-30 17:52:09,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:52:09" (1/1) ... [2023-08-30 17:52:09,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:52:09,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:52:09,992 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_27-funptr_racing.i[41323,41336] [2023-08-30 17:52:10,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:52:10,016 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:52:10,043 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_27-funptr_racing.i[41323,41336] [2023-08-30 17:52:10,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:52:10,083 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 17:52:10,087 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:52:10,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10 WrapperNode [2023-08-30 17:52:10,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:52:10,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:52:10,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:52:10,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:52:10,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,117 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2023-08-30 17:52:10,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:52:10,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:52:10,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:52:10,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:52:10,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,132 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:52:10,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:52:10,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:52:10,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:52:10,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (1/1) ... [2023-08-30 17:52:10,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:52:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:10,156 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 17:52:10,159 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 17:52:10,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:52:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:52:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:52:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:52:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:52:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:52:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:52:10,181 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:52:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:52:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:52:10,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:52:10,189 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 17:52:10,285 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:52:10,287 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:52:10,506 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:52:10,512 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:52:10,512 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 17:52:10,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:52:10 BoogieIcfgContainer [2023-08-30 17:52:10,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:52:10,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:52:10,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:52:10,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:52:10,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:52:09" (1/3) ... [2023-08-30 17:52:10,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c67a802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:52:10, skipping insertion in model container [2023-08-30 17:52:10,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:52:10" (2/3) ... [2023-08-30 17:52:10,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c67a802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:52:10, skipping insertion in model container [2023-08-30 17:52:10,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:52:10" (3/3) ... [2023-08-30 17:52:10,519 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-30 17:52:10,525 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:52:10,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:52:10,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:52:10,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:52:10,577 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:52:10,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 145 transitions, 298 flow [2023-08-30 17:52:10,711 INFO L130 PetriNetUnfolder]: 24/182 cut-off events. [2023-08-30 17:52:10,712 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:10,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 24/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 486 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-30 17:52:10,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 145 transitions, 298 flow [2023-08-30 17:52:10,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:10,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:10,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:10,749 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:10,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:10,787 INFO L130 PetriNetUnfolder]: 23/177 cut-off events. [2023-08-30 17:52:10,787 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:10,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 177 events. 23/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 478 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-30 17:52:10,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 5332 [2023-08-30 17:52:13,486 INFO L134 LiptonReduction]: Checked pairs total: 11408 [2023-08-30 17:52:13,487 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-30 17:52:13,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:13,513 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:13,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:13,517 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-08-30 17:52:13,517 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:13,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:13,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:13,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:13,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1779853269, now seen corresponding path program 1 times [2023-08-30 17:52:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:13,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150173839] [2023-08-30 17:52:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:13,794 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 17:52:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150173839] [2023-08-30 17:52:13,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150173839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:13,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:52:13,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606851513] [2023-08-30 17:52:13,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:13,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 253 [2023-08-30 17:52:13,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 51 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 17:52:13,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:13,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 253 [2023-08-30 17:52:13,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:13,946 INFO L130 PetriNetUnfolder]: 188/417 cut-off events. [2023-08-30 17:52:13,946 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:13,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 417 events. 188/417 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1858 event pairs, 150 based on Foata normal form. 24/393 useless extension candidates. Maximal degree in co-relation 803. Up to 375 conditions per place. [2023-08-30 17:52:13,952 INFO L137 encePairwiseOnDemand]: 235/253 looper letters, 41 selfloop transitions, 2 changer transitions 6/54 dead transitions. [2023-08-30 17:52:13,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 209 flow [2023-08-30 17:52:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-30 17:52:13,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783926218708827 [2023-08-30 17:52:13,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-30 17:52:13,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-30 17:52:13,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:13,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-30 17:52:13,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 17:52:13,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 17:52:13,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 17:52:13,982 INFO L175 Difference]: Start difference. First operand has 39 places, 51 transitions, 107 flow. Second operand 3 states and 439 transitions. [2023-08-30 17:52:13,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 209 flow [2023-08-30 17:52:13,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:13,986 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 73 flow [2023-08-30 17:52:13,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-30 17:52:13,989 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-30 17:52:13,989 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 73 flow [2023-08-30 17:52:13,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 17:52:13,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:13,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:13,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:52:13,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:13,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1258404404, now seen corresponding path program 1 times [2023-08-30 17:52:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:13,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476080506] [2023-08-30 17:52:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:14,093 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 17:52:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476080506] [2023-08-30 17:52:14,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476080506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:14,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470424935] [2023-08-30 17:52:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:14,114 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 17:52:14,148 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 17:52:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:14,215 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 17:52:14,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:14,226 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 17:52:14,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470424935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:14,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:14,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:52:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109519477] [2023-08-30 17:52:14,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:14,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:52:14,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:52:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:52:14,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 253 [2023-08-30 17:52:14,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 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 17:52:14,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:14,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 253 [2023-08-30 17:52:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:14,284 INFO L130 PetriNetUnfolder]: 35/92 cut-off events. [2023-08-30 17:52:14,284 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 17:52:14,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 92 events. 35/92 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 17/106 useless extension candidates. Maximal degree in co-relation 208. Up to 68 conditions per place. [2023-08-30 17:52:14,284 INFO L137 encePairwiseOnDemand]: 250/253 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-30 17:52:14,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 173 flow [2023-08-30 17:52:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:52:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:52:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-30 17:52:14,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138339920948617 [2023-08-30 17:52:14,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-30 17:52:14,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-30 17:52:14,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:14,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-30 17:52:14,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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 17:52:14,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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 17:52:14,290 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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 17:52:14,290 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 73 flow. Second operand 4 states and 520 transitions. [2023-08-30 17:52:14,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 173 flow [2023-08-30 17:52:14,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 167 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:52:14,291 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-30 17:52:14,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-30 17:52:14,291 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-30 17:52:14,292 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-30 17:52:14,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 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 17:52:14,294 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:14,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:52:14,498 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 17:52:14,499 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:52:14,500 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:14,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 145 transitions, 298 flow [2023-08-30 17:52:14,512 INFO L130 PetriNetUnfolder]: 24/182 cut-off events. [2023-08-30 17:52:14,512 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:14,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 24/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 486 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-30 17:52:14,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 145 transitions, 298 flow [2023-08-30 17:52:14,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:14,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:14,514 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:14,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:14,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 140 transitions, 285 flow [2023-08-30 17:52:14,523 INFO L130 PetriNetUnfolder]: 23/177 cut-off events. [2023-08-30 17:52:14,523 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:14,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 177 events. 23/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 478 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-30 17:52:14,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 5332 [2023-08-30 17:52:16,825 INFO L134 LiptonReduction]: Checked pairs total: 10302 [2023-08-30 17:52:16,825 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-30 17:52:16,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:52:16,827 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;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:16,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:16,838 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2023-08-30 17:52:16,839 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:16,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:16,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:52:16,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:52:16,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:16,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1419088883, now seen corresponding path program 1 times [2023-08-30 17:52:16,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:16,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068442277] [2023-08-30 17:52:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:16,863 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:52:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:16,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:52:16,910 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:52:16,911 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:52:16,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:52:16,911 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:52:16,912 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:52:16,912 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:52:16,912 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:52:16,943 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:52:16,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:16,982 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-08-30 17:52:16,982 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:52:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-30 17:52:16,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:16,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:16,986 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:16,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:16,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:16,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:17,009 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-08-30 17:52:17,010 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:52:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-30 17:52:17,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-08-30 17:52:19,591 INFO L134 LiptonReduction]: Checked pairs total: 60343 [2023-08-30 17:52:19,591 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 17:52:19,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:19,593 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;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:19,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:19,595 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-08-30 17:52:19,595 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:19,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:19,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:19,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:19,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash -935971945, now seen corresponding path program 1 times [2023-08-30 17:52:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:19,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232343539] [2023-08-30 17:52:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:19,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:19,616 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 17:52:19,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232343539] [2023-08-30 17:52:19,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232343539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:19,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:19,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:52:19,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260139853] [2023-08-30 17:52:19,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:19,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:19,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:19,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 349 [2023-08-30 17:52:19,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 17:52:19,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:19,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 349 [2023-08-30 17:52:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:20,481 INFO L130 PetriNetUnfolder]: 8909/15017 cut-off events. [2023-08-30 17:52:20,481 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-30 17:52:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28856 conditions, 15017 events. 8909/15017 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 110390 event pairs, 3944 based on Foata normal form. 1745/15009 useless extension candidates. Maximal degree in co-relation 1911. Up to 13678 conditions per place. [2023-08-30 17:52:20,525 INFO L137 encePairwiseOnDemand]: 319/349 looper letters, 66 selfloop transitions, 2 changer transitions 10/93 dead transitions. [2023-08-30 17:52:20,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 356 flow [2023-08-30 17:52:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-30 17:52:20,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600764087870105 [2023-08-30 17:52:20,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-30 17:52:20,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-30 17:52:20,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:20,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-30 17:52:20,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 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 17:52:20,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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 17:52:20,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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 17:52:20,531 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 218 flow. Second operand 3 states and 629 transitions. [2023-08-30 17:52:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 356 flow [2023-08-30 17:52:20,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:20,534 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 144 flow [2023-08-30 17:52:20,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-08-30 17:52:20,535 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-30 17:52:20,535 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 144 flow [2023-08-30 17:52:20,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 17:52:20,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:20,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:20,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:52:20,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:20,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1821804029, now seen corresponding path program 1 times [2023-08-30 17:52:20,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:20,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796396249] [2023-08-30 17:52:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:20,563 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 17:52:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796396249] [2023-08-30 17:52:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796396249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514029497] [2023-08-30 17:52:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:20,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:20,570 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 17:52:20,572 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 17:52:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:20,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:20,638 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 17:52:20,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:20,651 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 17:52:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514029497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:20,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:52:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051223726] [2023-08-30 17:52:20,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:52:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:52:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:52:20,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 349 [2023-08-30 17:52:20,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 172.57142857142858) internal successors, (1208), 7 states have internal predecessors, (1208), 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 17:52:20,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:20,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 349 [2023-08-30 17:52:20,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:20,976 INFO L130 PetriNetUnfolder]: 1768/3012 cut-off events. [2023-08-30 17:52:20,977 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-30 17:52:20,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6311 conditions, 3012 events. 1768/3012 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17909 event pairs, 0 based on Foata normal form. 361/3259 useless extension candidates. Maximal degree in co-relation 437. Up to 2052 conditions per place. [2023-08-30 17:52:20,984 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 0 selfloop transitions, 0 changer transitions 115/115 dead transitions. [2023-08-30 17:52:20,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 448 flow [2023-08-30 17:52:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:52:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:52:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 953 transitions. [2023-08-30 17:52:20,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461318051575931 [2023-08-30 17:52:20,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 953 transitions. [2023-08-30 17:52:20,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 953 transitions. [2023-08-30 17:52:20,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:20,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 953 transitions. [2023-08-30 17:52:20,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 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 17:52:20,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 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 17:52:20,992 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 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 17:52:20,992 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 144 flow. Second operand 5 states and 953 transitions. [2023-08-30 17:52:20,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 448 flow [2023-08-30 17:52:20,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:52:20,994 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-30 17:52:20,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-08-30 17:52:20,994 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-08-30 17:52:20,994 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-30 17:52:20,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 172.57142857142858) internal successors, (1208), 7 states have internal predecessors, (1208), 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 17:52:20,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:21,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:52:21,200 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 17:52:21,200 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:52:21,201 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:21,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:21,233 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-08-30 17:52:21,233 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:52:21,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-30 17:52:21,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:21,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:21,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:21,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:21,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:21,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-08-30 17:52:21,256 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-08-30 17:52:21,257 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:52:21,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-30 17:52:21,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-08-30 17:52:23,693 INFO L134 LiptonReduction]: Checked pairs total: 54066 [2023-08-30 17:52:23,693 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 17:52:23,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:52:23,699 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;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:23,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:23,703 INFO L130 PetriNetUnfolder]: 13/73 cut-off events. [2023-08-30 17:52:23,703 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:52:23,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:23,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:52:23,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:52:23,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1364117961, now seen corresponding path program 1 times [2023-08-30 17:52:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:23,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997234991] [2023-08-30 17:52:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:23,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:52:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:23,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:52:23,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:52:23,739 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:52:23,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:52:23,739 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:52:23,740 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:52:23,740 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:52:23,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:52:23,760 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:52:23,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:23,794 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-08-30 17:52:23,794 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:23,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-30 17:52:23,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:23,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:23,800 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:23,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:23,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:23,831 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-08-30 17:52:23,832 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:23,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-30 17:52:23,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 41664 [2023-08-30 17:52:26,073 INFO L134 LiptonReduction]: Checked pairs total: 122725 [2023-08-30 17:52:26,073 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-30 17:52:26,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:26,078 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;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:26,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:26,079 INFO L130 PetriNetUnfolder]: 1/19 cut-off events. [2023-08-30 17:52:26,079 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:26,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:26,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:26,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:26,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1386682415, now seen corresponding path program 1 times [2023-08-30 17:52:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023669709] [2023-08-30 17:52:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:26,119 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 17:52:26,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:26,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023669709] [2023-08-30 17:52:26,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023669709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:26,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:26,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:52:26,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946705050] [2023-08-30 17:52:26,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:26,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:26,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:26,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 450 [2023-08-30 17:52:26,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 137 transitions, 304 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 17:52:26,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:26,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 450 [2023-08-30 17:52:26,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:42,413 INFO L130 PetriNetUnfolder]: 199858/297590 cut-off events. [2023-08-30 17:52:42,414 INFO L131 PetriNetUnfolder]: For 3619/3619 co-relation queries the response was YES. [2023-08-30 17:52:42,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570590 conditions, 297590 events. 199858/297590 cut-off events. For 3619/3619 co-relation queries the response was YES. Maximal size of possible extension queue 7618. Compared 2640012 event pairs, 121992 based on Foata normal form. 36172/301896 useless extension candidates. Maximal degree in co-relation 26003. Up to 270400 conditions per place. [2023-08-30 17:52:43,384 INFO L137 encePairwiseOnDemand]: 409/450 looper letters, 80 selfloop transitions, 2 changer transitions 11/119 dead transitions. [2023-08-30 17:52:43,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 450 flow [2023-08-30 17:52:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2023-08-30 17:52:43,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2023-08-30 17:52:43,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2023-08-30 17:52:43,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2023-08-30 17:52:43,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:43,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2023-08-30 17:52:43,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 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 17:52:43,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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 17:52:43,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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 17:52:43,390 INFO L175 Difference]: Start difference. First operand has 100 places, 137 transitions, 304 flow. Second operand 3 states and 805 transitions. [2023-08-30 17:52:43,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 450 flow [2023-08-30 17:52:43,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 119 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:43,394 INFO L231 Difference]: Finished difference. Result has 103 places, 89 transitions, 203 flow [2023-08-30 17:52:43,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=103, PETRI_TRANSITIONS=89} [2023-08-30 17:52:43,395 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 3 predicate places. [2023-08-30 17:52:43,395 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 89 transitions, 203 flow [2023-08-30 17:52:43,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 17:52:43,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:43,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:52:43,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:43,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1035794882, now seen corresponding path program 1 times [2023-08-30 17:52:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:43,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705388332] [2023-08-30 17:52:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:43,419 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 17:52:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:43,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705388332] [2023-08-30 17:52:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705388332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:43,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305403907] [2023-08-30 17:52:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:43,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:43,421 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 17:52:43,422 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 17:52:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:43,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:43,513 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 17:52:43,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:43,523 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 17:52:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305403907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:43,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:43,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:52:43,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863267090] [2023-08-30 17:52:43,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:43,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:52:43,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:52:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:52:43,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 450 [2023-08-30 17:52:43,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 89 transitions, 203 flow. Second operand has 7 states, 7 states have (on average 222.57142857142858) internal successors, (1558), 7 states have internal predecessors, (1558), 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 17:52:43,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:43,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 450 [2023-08-30 17:52:43,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:46,520 INFO L130 PetriNetUnfolder]: 41059/59519 cut-off events. [2023-08-30 17:52:46,520 INFO L131 PetriNetUnfolder]: For 6462/6462 co-relation queries the response was YES. [2023-08-30 17:52:46,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122766 conditions, 59519 events. 41059/59519 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 1766. Compared 436637 event pairs, 1530 based on Foata normal form. 5220/61942 useless extension candidates. Maximal degree in co-relation 8551. Up to 39168 conditions per place. [2023-08-30 17:52:46,616 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 0 selfloop transitions, 0 changer transitions 191/191 dead transitions. [2023-08-30 17:52:46,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 739 flow [2023-08-30 17:52:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:52:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:52:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1489 transitions. [2023-08-30 17:52:46,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514814814814815 [2023-08-30 17:52:46,620 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1489 transitions. [2023-08-30 17:52:46,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1489 transitions. [2023-08-30 17:52:46,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:46,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1489 transitions. [2023-08-30 17:52:46,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 248.16666666666666) internal successors, (1489), 6 states have internal predecessors, (1489), 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 17:52:46,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 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 17:52:46,627 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 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 17:52:46,627 INFO L175 Difference]: Start difference. First operand has 103 places, 89 transitions, 203 flow. Second operand 6 states and 1489 transitions. [2023-08-30 17:52:46,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 739 flow [2023-08-30 17:52:46,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 191 transitions, 735 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:52:46,630 INFO L231 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2023-08-30 17:52:46,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2023-08-30 17:52:46,630 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -7 predicate places. [2023-08-30 17:52:46,630 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2023-08-30 17:52:46,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.57142857142858) internal successors, (1558), 7 states have internal predecessors, (1558), 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 17:52:46,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:46,636 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 17:52:46,835 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 17:52:46,836 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:52:46,836 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:46,877 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-08-30 17:52:46,877 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:46,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-30 17:52:46,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:46,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:46,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:46,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:46,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:46,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-08-30 17:52:46,919 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-08-30 17:52:46,919 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:46,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-30 17:52:46,931 INFO L119 LiptonReduction]: Number of co-enabled transitions 41664 [2023-08-30 17:52:49,493 INFO L134 LiptonReduction]: Checked pairs total: 122439 [2023-08-30 17:52:49,493 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-30 17:52:49,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:52:49,494 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;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:49,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:49,500 INFO L130 PetriNetUnfolder]: 29/129 cut-off events. [2023-08-30 17:52:49,500 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:52:49,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:49,500 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:52:49,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:52:49,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1219979132, now seen corresponding path program 1 times [2023-08-30 17:52:49,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:49,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488213215] [2023-08-30 17:52:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:49,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:49,510 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:52:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:49,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:52:49,519 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:52:49,519 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:52:49,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:52:49,519 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:52:49,520 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:52:49,520 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:52:49,520 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:52:49,538 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:52:49,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 337 transitions, 718 flow [2023-08-30 17:52:49,597 INFO L130 PetriNetUnfolder]: 109/683 cut-off events. [2023-08-30 17:52:49,598 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:52:49,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 109/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2924 event pairs, 6 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-08-30 17:52:49,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 337 transitions, 718 flow [2023-08-30 17:52:49,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 337 transitions, 718 flow [2023-08-30 17:52:49,612 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:49,612 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 337 transitions, 718 flow [2023-08-30 17:52:49,612 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 337 transitions, 718 flow [2023-08-30 17:52:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 337 transitions, 718 flow [2023-08-30 17:52:49,670 INFO L130 PetriNetUnfolder]: 109/683 cut-off events. [2023-08-30 17:52:49,671 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:52:49,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 109/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2924 event pairs, 6 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-08-30 17:52:49,838 INFO L119 LiptonReduction]: Number of co-enabled transitions 71672 [2023-08-30 17:52:52,747 INFO L134 LiptonReduction]: Checked pairs total: 215376 [2023-08-30 17:52:52,748 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-08-30 17:52:52,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:52,749 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;@97ab425, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:52,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:52,750 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-08-30 17:52:52,751 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:52:52,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:52,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:52,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:52,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2097699956, now seen corresponding path program 1 times [2023-08-30 17:52:52,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:52,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663593633] [2023-08-30 17:52:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:52,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:52,776 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 17:52:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663593633] [2023-08-30 17:52:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663593633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:52,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:52:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313547589] [2023-08-30 17:52:52,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:52,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 548 [2023-08-30 17:52:52,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 178 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 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 17:52:52,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:52,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 548 [2023-08-30 17:52:52,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand