./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.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 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:53:02,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:53:02,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:53:02,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:53:02,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:53:02,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:53:02,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:53:02,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:53:02,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:53:02,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:53:02,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:53:02,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:53:02,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:53:02,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:53:02,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:53:02,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:53:02,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:53:02,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:53:02,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:53:02,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:53:02,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:53:02,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:53:02,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:53:02,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:53:02,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:53:02,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:53:02,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:53:02,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:53:02,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:53:02,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:53:02,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:53:02,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:53:02,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:53:02,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:53:02,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:53:02,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:53:02,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:53:02,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:53:02,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:53:02,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:53:02,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:53:02,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:53:02,361 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:53:02,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:53:02,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:53:02,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:53:02,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:53:02,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:53:02,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:53:02,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:53:02,364 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:53:02,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:53:02,365 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:53:02,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:53:02,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:53:02,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:53:02,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:53:02,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:53:02,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:53:02,366 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:53:02,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:53:02,366 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:53:02,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:53:02,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:53:02,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:53:02,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:53:02,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:53:02,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:53:02,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:53:02,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:53:02,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:53:02,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:53:02,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:53:02,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:53:02,368 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:53:02,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:53:02,368 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:53:02,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:53:02,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:53:02,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:53:02,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:53:02,616 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:53:02,616 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:53:02,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-08-30 22:53:03,591 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:53:03,773 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:53:03,773 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-08-30 22:53:03,780 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a4a3207/6baafb4b2c3944b9b451104f1b85312d/FLAG9e7c84912 [2023-08-30 22:53:03,791 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a4a3207/6baafb4b2c3944b9b451104f1b85312d [2023-08-30 22:53:03,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:53:03,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:53:03,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:53:03,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:53:03,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:53:03,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:53:03" (1/1) ... [2023-08-30 22:53:03,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4455168b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:03, skipping insertion in model container [2023-08-30 22:53:03,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:53:03" (1/1) ... [2023-08-30 22:53:03,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:53:03,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:53:04,056 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-08-30 22:53:04,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:53:04,073 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:53:04,107 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-08-30 22:53:04,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:53:04,143 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:53:04,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04 WrapperNode [2023-08-30 22:53:04,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:53:04,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:53:04,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:53:04,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:53:04,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,189 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2023-08-30 22:53:04,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:53:04,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:53:04,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:53:04,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:53:04,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:53:04,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:53:04,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:53:04,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:53:04,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (1/1) ... [2023-08-30 22:53:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:53:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:53:04,248 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 22:53:04,249 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 22:53:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:53:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:53:04,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:53:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:53:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:53:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:53:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:53:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:53:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:53:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:53:04,273 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 22:53:04,375 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:53:04,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:53:04,489 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:53:04,511 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:53:04,511 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:53:04,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:53:04 BoogieIcfgContainer [2023-08-30 22:53:04,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:53:04,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:53:04,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:53:04,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:53:04,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:53:03" (1/3) ... [2023-08-30 22:53:04,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a81508f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:53:04, skipping insertion in model container [2023-08-30 22:53:04,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:53:04" (2/3) ... [2023-08-30 22:53:04,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a81508f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:53:04, skipping insertion in model container [2023-08-30 22:53:04,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:53:04" (3/3) ... [2023-08-30 22:53:04,518 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-08-30 22:53:04,522 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:53:04,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:53:04,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:53:04,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:53:04,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:53:04,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 22:53:04,671 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-08-30 22:53:04,673 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:53:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-30 22:53:04,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 22:53:04,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-08-30 22:53:04,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:53:04,695 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-30 22:53:04,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-30 22:53:04,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 22:53:04,723 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-08-30 22:53:04,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:53:04,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-30 22:53:04,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-30 22:53:06,736 INFO L134 LiptonReduction]: Checked pairs total: 1018 [2023-08-30 22:53:06,736 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-30 22:53:06,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:53:06,749 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;@12dd94f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:53:06,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:53:06,751 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-08-30 22:53:06,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:53:06,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:06,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 22:53:06,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:53:06,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash 339243402, now seen corresponding path program 1 times [2023-08-30 22:53:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497184147] [2023-08-30 22:53:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:06,875 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 22:53:06,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497184147] [2023-08-30 22:53:06,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497184147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:06,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:06,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:53:06,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078285761] [2023-08-30 22:53:06,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:06,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:53:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:53:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:53:06,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 149 [2023-08-30 22:53:06,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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 22:53:06,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:06,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 149 [2023-08-30 22:53:06,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:06,915 INFO L130 PetriNetUnfolder]: 7/19 cut-off events. [2023-08-30 22:53:06,916 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:53:06,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-08-30 22:53:06,918 INFO L137 encePairwiseOnDemand]: 147/149 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-08-30 22:53:06,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-08-30 22:53:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:53:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:53:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 135 transitions. [2023-08-30 22:53:06,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45302013422818793 [2023-08-30 22:53:06,929 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 135 transitions. [2023-08-30 22:53:06,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 135 transitions. [2023-08-30 22:53:06,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:06,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 135 transitions. [2023-08-30 22:53:06,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 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 22:53:06,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 22:53:06,941 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 22:53:06,942 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 135 transitions. [2023-08-30 22:53:06,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-08-30 22:53:06,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:53:06,945 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 21 flow [2023-08-30 22:53:06,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-08-30 22:53:06,950 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-08-30 22:53:06,950 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 21 flow [2023-08-30 22:53:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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 22:53:06,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:06,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:53:06,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:53:06,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:53:06,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1926557800, now seen corresponding path program 1 times [2023-08-30 22:53:06,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:06,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074155134] [2023-08-30 22:53:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:53:06,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:53:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:53:07,011 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:53:07,012 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:53:07,013 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 22:53:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 22:53:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 22:53:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:53:07,016 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:53:07,017 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:53:07,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:53:07,034 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:53:07,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 22:53:07,050 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-08-30 22:53:07,050 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:53:07,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-30 22:53:07,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 22:53:07,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-08-30 22:53:07,052 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:53:07,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-30 22:53:07,052 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-30 22:53:07,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 22:53:07,065 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-08-30 22:53:07,065 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:53:07,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-30 22:53:07,068 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-08-30 22:53:08,541 INFO L134 LiptonReduction]: Checked pairs total: 8290 [2023-08-30 22:53:08,541 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-30 22:53:08,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:53:08,550 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;@12dd94f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:53:08,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:53:08,553 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 22:53:08,553 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:53:08,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:08,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:08,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:53:08,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1541457953, now seen corresponding path program 1 times [2023-08-30 22:53:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412146374] [2023-08-30 22:53:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:08,634 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 22:53:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412146374] [2023-08-30 22:53:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412146374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:53:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559191234] [2023-08-30 22:53:08,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:08,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:53:08,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:53:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:53:08,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 212 [2023-08-30 22:53:08,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 22:53:08,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:08,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 212 [2023-08-30 22:53:08,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:08,743 INFO L130 PetriNetUnfolder]: 340/593 cut-off events. [2023-08-30 22:53:08,743 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 22:53:08,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 593 events. 340/593 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2732 event pairs, 144 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 720. Up to 351 conditions per place. [2023-08-30 22:53:08,747 INFO L137 encePairwiseOnDemand]: 205/212 looper letters, 31 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-08-30 22:53:08,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2023-08-30 22:53:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:53:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:53:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-08-30 22:53:08,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2023-08-30 22:53:08,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-08-30 22:53:08,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-08-30 22:53:08,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:08,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-08-30 22:53:08,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 22:53:08,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 22:53:08,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 22:53:08,752 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 294 transitions. [2023-08-30 22:53:08,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2023-08-30 22:53:08,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 22:53:08,753 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2023-08-30 22:53:08,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-30 22:53:08,754 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-30 22:53:08,754 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2023-08-30 22:53:08,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 22:53:08,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:08,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:53:08,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:53:08,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:53:08,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash 199702052, now seen corresponding path program 1 times [2023-08-30 22:53:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:08,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040396610] [2023-08-30 22:53:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:08,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:53:08,773 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:53:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:53:08,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:53:08,796 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:53:08,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:53:08,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:53:08,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 22:53:08,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:53:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:53:08,797 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:53:08,798 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:53:08,798 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:53:08,815 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:53:08,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-08-30 22:53:08,849 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-08-30 22:53:08,849 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:53:08,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-08-30 22:53:08,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 150 transitions, 321 flow [2023-08-30 22:53:08,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 150 transitions, 321 flow [2023-08-30 22:53:08,856 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:53:08,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 150 transitions, 321 flow [2023-08-30 22:53:08,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 150 transitions, 321 flow [2023-08-30 22:53:08,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-08-30 22:53:08,876 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-08-30 22:53:08,876 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:53:08,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-08-30 22:53:08,882 INFO L119 LiptonReduction]: Number of co-enabled transitions 11856 [2023-08-30 22:53:10,718 INFO L134 LiptonReduction]: Checked pairs total: 20053 [2023-08-30 22:53:10,718 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-30 22:53:10,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:53:10,720 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;@12dd94f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:53:10,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:53:10,722 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 22:53:10,722 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:53:10,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:10,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:10,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:53:10,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash 613531324, now seen corresponding path program 1 times [2023-08-30 22:53:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:10,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255645440] [2023-08-30 22:53:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:10,766 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 22:53:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255645440] [2023-08-30 22:53:10,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255645440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:10,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:10,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:53:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746106786] [2023-08-30 22:53:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:10,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:53:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:10,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:53:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:53:10,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 285 [2023-08-30 22:53:10,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 22:53:10,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:10,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 285 [2023-08-30 22:53:10,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:11,261 INFO L130 PetriNetUnfolder]: 5083/7355 cut-off events. [2023-08-30 22:53:11,262 INFO L131 PetriNetUnfolder]: For 736/736 co-relation queries the response was YES. [2023-08-30 22:53:11,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 7355 events. 5083/7355 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42589 event pairs, 2162 based on Foata normal form. 0/5679 useless extension candidates. Maximal degree in co-relation 1790. Up to 4309 conditions per place. [2023-08-30 22:53:11,290 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 49 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-30 22:53:11,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 267 flow [2023-08-30 22:53:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:53:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:53:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-30 22:53:11,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47485380116959064 [2023-08-30 22:53:11,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-30 22:53:11,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-30 22:53:11,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:11,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-30 22:53:11,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 22:53:11,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 22:53:11,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 22:53:11,302 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 406 transitions. [2023-08-30 22:53:11,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 267 flow [2023-08-30 22:53:11,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 259 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 22:53:11,305 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2023-08-30 22:53:11,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-30 22:53:11,307 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-30 22:53:11,307 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2023-08-30 22:53:11,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 22:53:11,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:11,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:11,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:53:11,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:53:11,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1120141961, now seen corresponding path program 1 times [2023-08-30 22:53:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:11,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965472564] [2023-08-30 22:53:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965472564] [2023-08-30 22:53:11,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965472564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:11,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:53:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005477579] [2023-08-30 22:53:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:11,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:53:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:53:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:53:11,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 285 [2023-08-30 22:53:11,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 22:53:11,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:11,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 285 [2023-08-30 22:53:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:11,995 INFO L130 PetriNetUnfolder]: 8087/11593 cut-off events. [2023-08-30 22:53:11,996 INFO L131 PetriNetUnfolder]: For 4036/4036 co-relation queries the response was YES. [2023-08-30 22:53:12,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26161 conditions, 11593 events. 8087/11593 cut-off events. For 4036/4036 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 68906 event pairs, 3492 based on Foata normal form. 0/9303 useless extension candidates. Maximal degree in co-relation 10756. Up to 6689 conditions per place. [2023-08-30 22:53:12,048 INFO L137 encePairwiseOnDemand]: 278/285 looper letters, 53 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-08-30 22:53:12,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 336 flow [2023-08-30 22:53:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:53:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:53:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 22:53:12,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47134502923976607 [2023-08-30 22:53:12,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 22:53:12,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 22:53:12,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:12,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 22:53:12,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 22:53:12,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 22:53:12,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 22:53:12,053 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 403 transitions. [2023-08-30 22:53:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 336 flow [2023-08-30 22:53:12,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:53:12,059 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2023-08-30 22:53:12,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-30 22:53:12,060 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-30 22:53:12,060 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2023-08-30 22:53:12,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 22:53:12,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:12,060 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:53:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:53:12,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:53:12,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1228727841, now seen corresponding path program 1 times [2023-08-30 22:53:12,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:12,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593411147] [2023-08-30 22:53:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:53:12,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:53:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:53:12,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:53:12,125 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:53:12,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:53:12,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:53:12,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:53:12,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:53:12,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:53:12,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:53:12,125 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:53:12,126 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:53:12,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:53:12,148 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:53:12,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 189 transitions, 410 flow [2023-08-30 22:53:12,166 INFO L130 PetriNetUnfolder]: 25/235 cut-off events. [2023-08-30 22:53:12,166 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:53:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 235 events. 25/235 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 642 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-08-30 22:53:12,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 189 transitions, 410 flow [2023-08-30 22:53:12,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 189 transitions, 410 flow [2023-08-30 22:53:12,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:53:12,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 189 transitions, 410 flow [2023-08-30 22:53:12,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 189 transitions, 410 flow [2023-08-30 22:53:12,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 189 transitions, 410 flow [2023-08-30 22:53:12,189 INFO L130 PetriNetUnfolder]: 25/235 cut-off events. [2023-08-30 22:53:12,189 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:53:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 235 events. 25/235 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 642 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-08-30 22:53:12,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 21736 [2023-08-30 22:53:14,401 INFO L134 LiptonReduction]: Checked pairs total: 38018 [2023-08-30 22:53:14,401 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-30 22:53:14,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:53:14,403 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;@12dd94f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:53:14,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:53:14,405 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 22:53:14,405 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:53:14,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:14,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:14,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:53:14,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:14,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1638488913, now seen corresponding path program 1 times [2023-08-30 22:53:14,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:14,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876853725] [2023-08-30 22:53:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:14,426 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 22:53:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876853725] [2023-08-30 22:53:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876853725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:14,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:14,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:53:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274278161] [2023-08-30 22:53:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:53:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:53:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:53:14,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 362 [2023-08-30 22:53:14,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 22:53:14,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:14,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 362 [2023-08-30 22:53:14,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:18,225 INFO L130 PetriNetUnfolder]: 57183/75565 cut-off events. [2023-08-30 22:53:18,225 INFO L131 PetriNetUnfolder]: For 10914/10914 co-relation queries the response was YES. [2023-08-30 22:53:18,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153557 conditions, 75565 events. 57183/75565 cut-off events. For 10914/10914 co-relation queries the response was YES. Maximal size of possible extension queue 2877. Compared 473843 event pairs, 25420 based on Foata normal form. 0/58186 useless extension candidates. Maximal degree in co-relation 14665. Up to 45825 conditions per place. [2023-08-30 22:53:18,637 INFO L137 encePairwiseOnDemand]: 353/362 looper letters, 66 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2023-08-30 22:53:18,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 363 flow [2023-08-30 22:53:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:53:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:53:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 22:53:18,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47605893186003684 [2023-08-30 22:53:18,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 22:53:18,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 22:53:18,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:18,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 22:53:18,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 22:53:18,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 22:53:18,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 22:53:18,643 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 132 flow. Second operand 3 states and 517 transitions. [2023-08-30 22:53:18,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 363 flow [2023-08-30 22:53:18,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 345 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 22:53:18,652 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 168 flow [2023-08-30 22:53:18,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-08-30 22:53:18,653 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-30 22:53:18,653 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 168 flow [2023-08-30 22:53:18,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 22:53:18,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:18,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:18,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:53:18,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:53:18,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:18,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1866340184, now seen corresponding path program 1 times [2023-08-30 22:53:18,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:18,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368362214] [2023-08-30 22:53:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:18,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:18,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368362214] [2023-08-30 22:53:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368362214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:18,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:18,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:53:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345895170] [2023-08-30 22:53:18,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:18,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:53:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:53:18,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:53:18,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 362 [2023-08-30 22:53:18,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 22:53:18,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:18,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 362 [2023-08-30 22:53:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:25,444 INFO L130 PetriNetUnfolder]: 93460/122960 cut-off events. [2023-08-30 22:53:25,444 INFO L131 PetriNetUnfolder]: For 40126/40154 co-relation queries the response was YES. [2023-08-30 22:53:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274472 conditions, 122960 events. 93460/122960 cut-off events. For 40126/40154 co-relation queries the response was YES. Maximal size of possible extension queue 4727. Compared 796990 event pairs, 41161 based on Foata normal form. 28/97268 useless extension candidates. Maximal degree in co-relation 107971. Up to 73704 conditions per place. [2023-08-30 22:53:26,107 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 71 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2023-08-30 22:53:26,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 442 flow [2023-08-30 22:53:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:53:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:53:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-30 22:53:26,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732965009208103 [2023-08-30 22:53:26,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-30 22:53:26,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-30 22:53:26,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:26,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-30 22:53:26,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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 22:53:26,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 22:53:26,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 22:53:26,112 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 168 flow. Second operand 3 states and 514 transitions. [2023-08-30 22:53:26,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 442 flow [2023-08-30 22:53:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 90 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:53:26,237 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 234 flow [2023-08-30 22:53:26,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-30 22:53:26,238 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-30 22:53:26,238 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 234 flow [2023-08-30 22:53:26,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 22:53:26,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:26,238 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 22:53:26,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:53:26,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1854475387, now seen corresponding path program 1 times [2023-08-30 22:53:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476645747] [2023-08-30 22:53:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 22:53:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476645747] [2023-08-30 22:53:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476645747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:26,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:26,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:53:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565443735] [2023-08-30 22:53:26,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:53:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:53:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:53:26,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 362 [2023-08-30 22:53:26,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 22:53:26,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:26,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 362 [2023-08-30 22:53:26,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:35,853 INFO L130 PetriNetUnfolder]: 136989/179734 cut-off events. [2023-08-30 22:53:35,853 INFO L131 PetriNetUnfolder]: For 100293/100713 co-relation queries the response was YES. [2023-08-30 22:53:36,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429537 conditions, 179734 events. 136989/179734 cut-off events. For 100293/100713 co-relation queries the response was YES. Maximal size of possible extension queue 6834. Compared 1187418 event pairs, 65045 based on Foata normal form. 0/142404 useless extension candidates. Maximal degree in co-relation 161067. Up to 115074 conditions per place. [2023-08-30 22:53:37,067 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 76 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2023-08-30 22:53:37,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 565 flow [2023-08-30 22:53:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:53:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:53:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-08-30 22:53:37,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714548802946593 [2023-08-30 22:53:37,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-08-30 22:53:37,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-08-30 22:53:37,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:37,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-08-30 22:53:37,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 22:53:37,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 22:53:37,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 22:53:37,072 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 234 flow. Second operand 3 states and 512 transitions. [2023-08-30 22:53:37,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 565 flow [2023-08-30 22:53:37,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 531 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:53:37,310 INFO L231 Difference]: Finished difference. Result has 58 places, 71 transitions, 348 flow [2023-08-30 22:53:37,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=58, PETRI_TRANSITIONS=71} [2023-08-30 22:53:37,310 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-30 22:53:37,310 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 71 transitions, 348 flow [2023-08-30 22:53:37,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 22:53:37,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:37,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:37,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 22:53:37,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:53:37,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1591048736, now seen corresponding path program 1 times [2023-08-30 22:53:37,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:37,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52713344] [2023-08-30 22:53:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:37,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:37,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:37,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52713344] [2023-08-30 22:53:37,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52713344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:37,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:37,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:53:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103806917] [2023-08-30 22:53:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:37,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:53:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:53:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:53:37,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 362 [2023-08-30 22:53:37,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 22:53:37,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:37,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 362 [2023-08-30 22:53:37,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:57,695 INFO L130 PetriNetUnfolder]: 279546/363106 cut-off events. [2023-08-30 22:53:57,695 INFO L131 PetriNetUnfolder]: For 268240/269544 co-relation queries the response was YES. [2023-08-30 22:53:58,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930666 conditions, 363106 events. 279546/363106 cut-off events. For 268240/269544 co-relation queries the response was YES. Maximal size of possible extension queue 11396. Compared 2492310 event pairs, 74157 based on Foata normal form. 688/308491 useless extension candidates. Maximal degree in co-relation 796239. Up to 127670 conditions per place. [2023-08-30 22:54:00,005 INFO L137 encePairwiseOnDemand]: 350/362 looper letters, 196 selfloop transitions, 61 changer transitions 0/264 dead transitions. [2023-08-30 22:54:00,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 264 transitions, 1695 flow [2023-08-30 22:54:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 22:54:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 22:54:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1181 transitions. [2023-08-30 22:54:00,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660615627466456 [2023-08-30 22:54:00,008 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1181 transitions. [2023-08-30 22:54:00,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1181 transitions. [2023-08-30 22:54:00,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:00,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1181 transitions. [2023-08-30 22:54:00,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 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 22:54:00,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 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 22:54:00,013 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 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 22:54:00,013 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 348 flow. Second operand 7 states and 1181 transitions. [2023-08-30 22:54:00,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 264 transitions, 1695 flow [2023-08-30 22:54:01,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 264 transitions, 1597 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:54:01,419 INFO L231 Difference]: Finished difference. Result has 68 places, 120 transitions, 936 flow [2023-08-30 22:54:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=68, PETRI_TRANSITIONS=120} [2023-08-30 22:54:01,419 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-30 22:54:01,419 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 120 transitions, 936 flow [2023-08-30 22:54:01,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 22:54:01,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:01,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 22:54:01,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:54:01,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1749691500, now seen corresponding path program 2 times [2023-08-30 22:54:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776131336] [2023-08-30 22:54:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:54:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776131336] [2023-08-30 22:54:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776131336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:01,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:54:01,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530328529] [2023-08-30 22:54:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:54:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:54:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:54:01,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 362 [2023-08-30 22:54:01,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 120 transitions, 936 flow. Second operand has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 22:54:01,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:01,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 362 [2023-08-30 22:54:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand