./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:48:50,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:48:50,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:48:50,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:48:50,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:48:50,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:48:50,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:48:50,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:48:50,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:48:50,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:48:50,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:48:50,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:48:50,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:48:50,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:48:50,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:48:50,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:48:50,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:48:50,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:48:50,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:48:50,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:48:50,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:48:50,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:48:50,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:48:50,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:48:50,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:48:50,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:48:50,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:48:50,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:48:50,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:48:50,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:48:50,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:48:50,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:48:50,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:48:50,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:48:50,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:48:50,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:48:50,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:48:50,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:48:50,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:48:50,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:48:50,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:48:50,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:48:50,412 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:48:50,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:48:50,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:48:50,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:48:50,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:48:50,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:48:50,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:48:50,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:48:50,416 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:48:50,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:48:50,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:48:50,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:48:50,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:48:50,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:48:50,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:48:50,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:48:50,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:48:50,418 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:48:50,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:48:50,418 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:48:50,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:48:50,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:48:50,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:48:50,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:48:50,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:48:50,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:48:50,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:48:50,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:48:50,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:48:50,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:48:50,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:48:50,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:48:50,421 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:48:50,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:48:50,421 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:48:50,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:48:50,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:48:50,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:48:50,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:48:50,738 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:48:50,739 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:48:50,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-30 17:48:51,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:48:52,181 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:48:52,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-30 17:48:52,199 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af79f2f8/0d197adcebfd49728bbee6416f283286/FLAGbe5aaed16 [2023-08-30 17:48:52,225 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af79f2f8/0d197adcebfd49728bbee6416f283286 [2023-08-30 17:48:52,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:48:52,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:48:52,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:48:52,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:48:52,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:48:52,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9c1f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52, skipping insertion in model container [2023-08-30 17:48:52,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:48:52,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:48:52,594 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2023-08-30 17:48:52,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:48:52,631 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:48:52,666 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2023-08-30 17:48:52,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:48:52,737 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:48:52,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52 WrapperNode [2023-08-30 17:48:52,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:48:52,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:48:52,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:48:52,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:48:52,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,800 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-08-30 17:48:52,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:48:52,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:48:52,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:48:52,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:48:52,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:48:52,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:48:52,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:48:52,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:48:52,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (1/1) ... [2023-08-30 17:48:52,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:48:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:48:52,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 17:48:52,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 17:48:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:48:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:48:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:48:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:48:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:48:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:48:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:48:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:48:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:48:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:48:52,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:48:52,922 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:48:53,073 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:48:53,090 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:48:53,322 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:48:53,329 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:48:53,331 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:48:53,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:48:53 BoogieIcfgContainer [2023-08-30 17:48:53,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:48:53,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:48:53,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:48:53,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:48:53,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:48:52" (1/3) ... [2023-08-30 17:48:53,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217c5e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:48:53, skipping insertion in model container [2023-08-30 17:48:53,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:52" (2/3) ... [2023-08-30 17:48:53,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217c5e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:48:53, skipping insertion in model container [2023-08-30 17:48:53,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:48:53" (3/3) ... [2023-08-30 17:48:53,342 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-08-30 17:48:53,349 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:48:53,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:48:53,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:48:53,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:48:53,409 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:48:53,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2023-08-30 17:48:53,481 INFO L130 PetriNetUnfolder]: 17/150 cut-off events. [2023-08-30 17:48:53,482 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:48:53,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:48:53,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2023-08-30 17:48:53,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:53,493 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:48:53,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:53,508 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:53,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:53,535 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 17:48:53,536 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:48:53,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 16/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 334 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:48:53,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-30 17:48:56,481 INFO L134 LiptonReduction]: Checked pairs total: 4759 [2023-08-30 17:48:56,481 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-30 17:48:56,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:48:56,496 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:48:56,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:48:56,499 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 17:48:56,499 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:48:56,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:48:56,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:48:56,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:48:56,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:48:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash 13525794, now seen corresponding path program 1 times [2023-08-30 17:48:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:48:56,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797027483] [2023-08-30 17:48:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:48:56,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:48:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:48:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:48:56,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:48:56,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797027483] [2023-08-30 17:48:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797027483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:48:56,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:48:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:48:56,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921501688] [2023-08-30 17:48:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:48:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:48:56,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:48:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:48:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:48:56,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 208 [2023-08-30 17:48:56,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:56,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:48:56,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 208 [2023-08-30 17:48:56,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:48:56,912 INFO L130 PetriNetUnfolder]: 80/204 cut-off events. [2023-08-30 17:48:56,913 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:48:56,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 204 events. 80/204 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 873 event pairs, 0 based on Foata normal form. 9/191 useless extension candidates. Maximal degree in co-relation 368. Up to 169 conditions per place. [2023-08-30 17:48:56,918 INFO L137 encePairwiseOnDemand]: 196/208 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-30 17:48:56,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-30 17:48:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:48:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:48:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-30 17:48:56,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-30 17:48:56,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-30 17:48:56,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-30 17:48:56,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:48:56,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-30 17:48:56,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:56,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:56,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:56,954 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 338 transitions. [2023-08-30 17:48:56,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-30 17:48:56,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:48:56,958 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-08-30 17:48:56,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-30 17:48:56,962 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-30 17:48:56,962 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-08-30 17:48:56,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:56,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:48:56,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:48:56,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:48:56,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:48:56,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:48:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1040131102, now seen corresponding path program 1 times [2023-08-30 17:48:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:48:56,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432735756] [2023-08-30 17:48:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:48:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:48:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:48:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:48:57,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:48:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432735756] [2023-08-30 17:48:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432735756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:48:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396393220] [2023-08-30 17:48:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:48:57,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:48:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:48:57,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:48:57,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:48:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:48:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:48:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:48:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:48:57,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:48:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:48:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396393220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:48:57,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:48:57,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:48:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765560946] [2023-08-30 17:48:57,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:48:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:48:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:48:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:48:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:48:57,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 208 [2023-08-30 17:48:57,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 98.28571428571429) internal successors, (688), 7 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:57,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:48:57,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 208 [2023-08-30 17:48:57,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:48:57,405 INFO L130 PetriNetUnfolder]: 20/56 cut-off events. [2023-08-30 17:48:57,405 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:48:57,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 56 events. 20/56 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 127. Up to 42 conditions per place. [2023-08-30 17:48:57,406 INFO L137 encePairwiseOnDemand]: 205/208 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-30 17:48:57,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 111 flow [2023-08-30 17:48:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:48:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:48:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-08-30 17:48:57,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2023-08-30 17:48:57,408 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-08-30 17:48:57,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-08-30 17:48:57,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:48:57,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-08-30 17:48:57,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:57,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:57,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:57,412 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 410 transitions. [2023-08-30 17:48:57,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 111 flow [2023-08-30 17:48:57,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:48:57,417 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-30 17:48:57,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-30 17:48:57,418 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-30 17:48:57,418 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-30 17:48:57,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.28571428571429) internal successors, (688), 7 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:48:57,421 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:48:57,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:48:57,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:48:57,628 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:48:57,629 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:48:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2023-08-30 17:48:57,647 INFO L130 PetriNetUnfolder]: 17/150 cut-off events. [2023-08-30 17:48:57,647 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:48:57,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:48:57,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2023-08-30 17:48:57,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:57,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:48:57,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:57,651 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 225 flow [2023-08-30 17:48:57,671 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 17:48:57,672 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:48:57,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 16/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 334 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:48:57,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-30 17:49:00,357 INFO L134 LiptonReduction]: Checked pairs total: 4759 [2023-08-30 17:49:00,357 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-30 17:49:00,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:00,360 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:00,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:00,363 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 17:49:00,363 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:00,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:49:00,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:00,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1446096040, now seen corresponding path program 1 times [2023-08-30 17:49:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053380648] [2023-08-30 17:49:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:00,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:00,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:00,425 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:00,425 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:00,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:49:00,426 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:00,426 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:00,427 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:00,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:49:00,446 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:49:00,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:00,478 INFO L130 PetriNetUnfolder]: 31/244 cut-off events. [2023-08-30 17:49:00,479 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:00,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 31/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-30 17:49:00,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:00,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:00,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:00,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:00,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:00,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:00,515 INFO L130 PetriNetUnfolder]: 31/244 cut-off events. [2023-08-30 17:49:00,515 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:00,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 31/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-30 17:49:00,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-30 17:49:03,320 INFO L134 LiptonReduction]: Checked pairs total: 16685 [2023-08-30 17:49:03,320 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-30 17:49:03,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:03,323 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:03,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:03,325 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 17:49:03,325 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:03,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:03,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:03,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:03,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 25654226, now seen corresponding path program 1 times [2023-08-30 17:49:03,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:03,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009492711] [2023-08-30 17:49:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:03,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009492711] [2023-08-30 17:49:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009492711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:03,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621378669] [2023-08-30 17:49:03,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:03,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 266 [2023-08-30 17:49:03,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:03,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 266 [2023-08-30 17:49:03,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:03,641 INFO L130 PetriNetUnfolder]: 1642/2949 cut-off events. [2023-08-30 17:49:03,641 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:49:03,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17581 event pairs, 752 based on Foata normal form. 428/3079 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-08-30 17:49:03,650 INFO L137 encePairwiseOnDemand]: 249/266 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-08-30 17:49:03,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-30 17:49:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-30 17:49:03,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451127819548872 [2023-08-30 17:49:03,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-30 17:49:03,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-30 17:49:03,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:03,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-30 17:49:03,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,657 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 435 transitions. [2023-08-30 17:49:03,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-30 17:49:03,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:03,659 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-08-30 17:49:03,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-08-30 17:49:03,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 17:49:03,660 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-08-30 17:49:03,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:03,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:03,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:49:03,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:03,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1296579555, now seen corresponding path program 1 times [2023-08-30 17:49:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:03,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42178109] [2023-08-30 17:49:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:03,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42178109] [2023-08-30 17:49:03,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42178109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259829911] [2023-08-30 17:49:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:03,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:03,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:49:03,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:49:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:03,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:03,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259829911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:03,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61224000] [2023-08-30 17:49:03,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:03,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:03,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 266 [2023-08-30 17:49:03,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:03,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 266 [2023-08-30 17:49:03,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:03,962 INFO L130 PetriNetUnfolder]: 376/688 cut-off events. [2023-08-30 17:49:03,963 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 17:49:03,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 688 events. 376/688 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3204 event pairs, 0 based on Foata normal form. 90/778 useless extension candidates. Maximal degree in co-relation 163. Up to 450 conditions per place. [2023-08-30 17:49:03,965 INFO L137 encePairwiseOnDemand]: 263/266 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-30 17:49:03,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 222 flow [2023-08-30 17:49:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:49:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:49:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-30 17:49:03,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 17:49:03,968 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-30 17:49:03,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-30 17:49:03,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:03,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-30 17:49:03,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 266.0) internal successors, (1596), 6 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,973 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 266.0) internal successors, (1596), 6 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,974 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 665 transitions. [2023-08-30 17:49:03,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 222 flow [2023-08-30 17:49:03,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:49:03,976 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 17:49:03,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-30 17:49:03,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-30 17:49:03,980 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 17:49:03,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:03,982 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:49:03,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 17:49:04,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:04,187 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:04,188 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:49:04,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:04,222 INFO L130 PetriNetUnfolder]: 31/244 cut-off events. [2023-08-30 17:49:04,223 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:04,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 31/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-30 17:49:04,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:04,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:04,226 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:04,226 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:04,226 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:04,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2023-08-30 17:49:04,245 INFO L130 PetriNetUnfolder]: 31/244 cut-off events. [2023-08-30 17:49:04,245 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:04,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 31/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-30 17:49:04,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-30 17:49:06,873 INFO L134 LiptonReduction]: Checked pairs total: 16685 [2023-08-30 17:49:06,873 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-30 17:49:06,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:06,876 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:06,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:06,880 INFO L130 PetriNetUnfolder]: 10/54 cut-off events. [2023-08-30 17:49:06,884 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:49:06,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:06,884 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:49:06,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:06,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash -927248252, now seen corresponding path program 1 times [2023-08-30 17:49:06,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:06,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613389932] [2023-08-30 17:49:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:06,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:06,899 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:06,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:06,914 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:06,914 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:49:06,915 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:06,915 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:06,915 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:06,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:49:06,936 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:49:06,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:06,973 INFO L130 PetriNetUnfolder]: 50/369 cut-off events. [2023-08-30 17:49:06,973 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:06,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 369 events. 50/369 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2023-08-30 17:49:06,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:06,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:06,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:06,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:06,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:06,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:07,009 INFO L130 PetriNetUnfolder]: 50/369 cut-off events. [2023-08-30 17:49:07,010 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:07,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 369 events. 50/369 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2023-08-30 17:49:07,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 16038 [2023-08-30 17:49:09,864 INFO L134 LiptonReduction]: Checked pairs total: 35355 [2023-08-30 17:49:09,864 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-30 17:49:09,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:09,866 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:09,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:09,868 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 17:49:09,868 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:09,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:09,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:09,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:09,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash 40152060, now seen corresponding path program 1 times [2023-08-30 17:49:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:09,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740965499] [2023-08-30 17:49:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:09,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740965499] [2023-08-30 17:49:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740965499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147910516] [2023-08-30 17:49:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:09,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-08-30 17:49:09,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:09,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:09,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-08-30 17:49:09,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:13,575 INFO L130 PetriNetUnfolder]: 32280/46608 cut-off events. [2023-08-30 17:49:13,576 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2023-08-30 17:49:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92837 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 302875 event pairs, 21006 based on Foata normal form. 5103/47987 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-30 17:49:13,769 INFO L137 encePairwiseOnDemand]: 297/320 looper letters, 44 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-08-30 17:49:13,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-30 17:49:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 17:49:13,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2023-08-30 17:49:13,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 17:49:13,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 17:49:13,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:13,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 17:49:13,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:13,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:13,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:13,778 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 535 transitions. [2023-08-30 17:49:13,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-30 17:49:13,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:13,783 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-08-30 17:49:13,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-30 17:49:13,785 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 17:49:13,785 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-08-30 17:49:13,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:13,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:13,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:13,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:49:13,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:13,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash 885415957, now seen corresponding path program 1 times [2023-08-30 17:49:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133510664] [2023-08-30 17:49:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133510664] [2023-08-30 17:49:13,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133510664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008943770] [2023-08-30 17:49:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:13,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:13,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:13,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:49:13,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:49:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:13,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008943770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:14,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368452701] [2023-08-30 17:49:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:14,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:14,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 320 [2023-08-30 17:49:14,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:14,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:14,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 320 [2023-08-30 17:49:14,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:14,945 INFO L130 PetriNetUnfolder]: 7582/11197 cut-off events. [2023-08-30 17:49:14,945 INFO L131 PetriNetUnfolder]: For 1404/1404 co-relation queries the response was YES. [2023-08-30 17:49:14,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 11197 events. 7582/11197 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 65170 event pairs, 0 based on Foata normal form. 1098/12294 useless extension candidates. Maximal degree in co-relation 2698. Up to 7322 conditions per place. [2023-08-30 17:49:14,973 INFO L137 encePairwiseOnDemand]: 317/320 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-30 17:49:14,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 403 flow [2023-08-30 17:49:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:49:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:49:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 994 transitions. [2023-08-30 17:49:14,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177083333333333 [2023-08-30 17:49:14,977 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 994 transitions. [2023-08-30 17:49:14,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 994 transitions. [2023-08-30 17:49:14,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:14,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 994 transitions. [2023-08-30 17:49:14,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 165.66666666666666) internal successors, (994), 6 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:14,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:14,983 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:14,983 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 994 transitions. [2023-08-30 17:49:14,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 403 flow [2023-08-30 17:49:14,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:49:14,987 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 17:49:14,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-30 17:49:14,988 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 17:49:14,988 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 17:49:14,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:14,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:49:14,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 17:49:15,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:15,194 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:15,195 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:49:15,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:15,233 INFO L130 PetriNetUnfolder]: 50/369 cut-off events. [2023-08-30 17:49:15,233 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:15,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 369 events. 50/369 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2023-08-30 17:49:15,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:15,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:15,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:15,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:15,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:15,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2023-08-30 17:49:15,266 INFO L130 PetriNetUnfolder]: 50/369 cut-off events. [2023-08-30 17:49:15,266 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:15,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 369 events. 50/369 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2023-08-30 17:49:15,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 16038 [2023-08-30 17:49:18,102 INFO L134 LiptonReduction]: Checked pairs total: 34815 [2023-08-30 17:49:18,102 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-30 17:49:18,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:18,104 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:18,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:18,112 INFO L130 PetriNetUnfolder]: 19/91 cut-off events. [2023-08-30 17:49:18,113 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:49:18,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:18,113 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:49:18,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:18,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1294276811, now seen corresponding path program 1 times [2023-08-30 17:49:18,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:18,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129905002] [2023-08-30 17:49:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:18,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:18,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:18,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:18,154 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:18,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:49:18,154 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:18,155 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:18,155 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:18,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:49:18,192 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:49:18,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2023-08-30 17:49:18,252 INFO L130 PetriNetUnfolder]: 81/558 cut-off events. [2023-08-30 17:49:18,253 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:49:18,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 558 events. 81/558 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2119 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 389. Up to 32 conditions per place. [2023-08-30 17:49:18,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2023-08-30 17:49:18,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2023-08-30 17:49:18,262 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:18,262 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 220 transitions, 484 flow [2023-08-30 17:49:18,263 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 220 transitions, 484 flow [2023-08-30 17:49:18,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2023-08-30 17:49:18,315 INFO L130 PetriNetUnfolder]: 81/558 cut-off events. [2023-08-30 17:49:18,316 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:49:18,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 558 events. 81/558 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2119 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 389. Up to 32 conditions per place. [2023-08-30 17:49:18,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 26136 [2023-08-30 17:49:21,324 INFO L134 LiptonReduction]: Checked pairs total: 65940 [2023-08-30 17:49:21,324 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-30 17:49:21,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:21,326 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:21,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:21,327 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 17:49:21,327 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:21,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:21,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:21,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:21,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash 56929992, now seen corresponding path program 1 times [2023-08-30 17:49:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:21,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175071418] [2023-08-30 17:49:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:21,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:21,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175071418] [2023-08-30 17:49:21,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175071418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:21,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:21,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:21,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230119096] [2023-08-30 17:49:21,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:21,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:21,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:21,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 374 [2023-08-30 17:49:21,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:49:21,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:21,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 374 [2023-08-30 17:49:21,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:58,612 INFO L130 PetriNetUnfolder]: 411276/561314 cut-off events. [2023-08-30 17:49:58,612 INFO L131 PetriNetUnfolder]: For 20950/20950 co-relation queries the response was YES. [2023-08-30 17:49:59,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108130 conditions, 561314 events. 411276/561314 cut-off events. For 20950/20950 co-relation queries the response was YES. Maximal size of possible extension queue 10564. Compared 4249549 event pairs, 302497 based on Foata normal form. 85320/609495 useless extension candidates. Maximal degree in co-relation 94407. Up to 535317 conditions per place. [2023-08-30 17:50:01,006 INFO L137 encePairwiseOnDemand]: 345/374 looper letters, 54 selfloop transitions, 2 changer transitions 12/78 dead transitions. [2023-08-30 17:50:01,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-30 17:50:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:50:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:50:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 17:50:01,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641711229946524 [2023-08-30 17:50:01,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 17:50:01,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 17:50:01,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:01,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 17:50:01,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:01,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:01,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:01,013 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 633 transitions. [2023-08-30 17:50:01,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-30 17:50:01,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:50:01,020 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-08-30 17:50:01,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-08-30 17:50:01,020 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-30 17:50:01,021 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-08-30 17:50:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:01,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:01,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:50:01,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:50:01,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1159290993, now seen corresponding path program 1 times [2023-08-30 17:50:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952961692] [2023-08-30 17:50:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:01,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:01,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952961692] [2023-08-30 17:50:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952961692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:01,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288417725] [2023-08-30 17:50:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:01,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:01,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:01,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:50:01,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:50:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:50:01,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:01,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:01,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288417725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:01,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:01,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:50:01,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110345138] [2023-08-30 17:50:01,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:50:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:50:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:50:01,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 374 [2023-08-30 17:50:01,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:01,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:01,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 374 [2023-08-30 17:50:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:15,625 INFO L130 PetriNetUnfolder]: 191482/255667 cut-off events. [2023-08-30 17:50:15,625 INFO L131 PetriNetUnfolder]: For 16300/16300 co-relation queries the response was YES. [2023-08-30 17:50:16,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528312 conditions, 255667 events. 191482/255667 cut-off events. For 16300/16300 co-relation queries the response was YES. Maximal size of possible extension queue 5416. Compared 1766241 event pairs, 7920 based on Foata normal form. 1110/256777 useless extension candidates. Maximal degree in co-relation 53961. Up to 163477 conditions per place. [2023-08-30 17:50:17,078 INFO L137 encePairwiseOnDemand]: 370/374 looper letters, 136 selfloop transitions, 5 changer transitions 1/152 dead transitions. [2023-08-30 17:50:17,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 626 flow [2023-08-30 17:50:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:50:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:50:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1207 transitions. [2023-08-30 17:50:17,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2023-08-30 17:50:17,084 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1207 transitions. [2023-08-30 17:50:17,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1207 transitions. [2023-08-30 17:50:17,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:17,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1207 transitions. [2023-08-30 17:50:17,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.16666666666666) internal successors, (1207), 6 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:17,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:17,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:17,091 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1207 transitions. [2023-08-30 17:50:17,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 626 flow [2023-08-30 17:50:17,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 618 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:50:17,104 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-30 17:50:17,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-30 17:50:17,106 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-30 17:50:17,106 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-30 17:50:17,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:17,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:17,107 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:17,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 17:50:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:17,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:50:17,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash 54378534, now seen corresponding path program 1 times [2023-08-30 17:50:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:17,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199144381] [2023-08-30 17:50:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:17,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:17,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199144381] [2023-08-30 17:50:17,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199144381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:17,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815071496] [2023-08-30 17:50:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:17,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:17,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:17,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:50:17,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:50:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:50:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:17,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815071496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:17,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:50:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156885459] [2023-08-30 17:50:17,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:17,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:50:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:50:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:50:17,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 374 [2023-08-30 17:50:17,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 179.6153846153846) internal successors, (2335), 13 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:17,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:17,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 374 [2023-08-30 17:50:17,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:22,945 INFO L130 PetriNetUnfolder]: 63646/89221 cut-off events. [2023-08-30 17:50:22,945 INFO L131 PetriNetUnfolder]: For 70140/70140 co-relation queries the response was YES. [2023-08-30 17:50:23,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208526 conditions, 89221 events. 63646/89221 cut-off events. For 70140/70140 co-relation queries the response was YES. Maximal size of possible extension queue 2058. Compared 601158 event pairs, 0 based on Foata normal form. 8910/98131 useless extension candidates. Maximal degree in co-relation 27219. Up to 40869 conditions per place. [2023-08-30 17:50:23,227 INFO L137 encePairwiseOnDemand]: 371/374 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-08-30 17:50:23,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 148 transitions, 626 flow [2023-08-30 17:50:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:50:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:50:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1378 transitions. [2023-08-30 17:50:23,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263559969442322 [2023-08-30 17:50:23,231 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1378 transitions. [2023-08-30 17:50:23,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1378 transitions. [2023-08-30 17:50:23,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:23,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1378 transitions. [2023-08-30 17:50:23,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.85714285714286) internal successors, (1378), 7 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:23,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:23,241 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:23,241 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1378 transitions. [2023-08-30 17:50:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 148 transitions, 626 flow [2023-08-30 17:50:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 148 transitions, 607 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 17:50:23,469 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-30 17:50:23,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-30 17:50:23,470 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-08-30 17:50:23,470 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-30 17:50:23,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 179.6153846153846) internal successors, (2335), 13 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:23,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:50:23,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:50:23,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 17:50:23,671 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:50:23,672 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:50:23,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2023-08-30 17:50:23,709 INFO L130 PetriNetUnfolder]: 81/558 cut-off events. [2023-08-30 17:50:23,710 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:23,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 558 events. 81/558 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2119 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 389. Up to 32 conditions per place. [2023-08-30 17:50:23,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2023-08-30 17:50:23,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2023-08-30 17:50:23,716 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:23,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 220 transitions, 484 flow [2023-08-30 17:50:23,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 220 transitions, 484 flow [2023-08-30 17:50:23,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2023-08-30 17:50:23,750 INFO L130 PetriNetUnfolder]: 81/558 cut-off events. [2023-08-30 17:50:23,750 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:23,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 558 events. 81/558 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2119 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 389. Up to 32 conditions per place. [2023-08-30 17:50:23,765 INFO L119 LiptonReduction]: Number of co-enabled transitions 26136 [2023-08-30 17:50:27,000 INFO L134 LiptonReduction]: Checked pairs total: 60234 [2023-08-30 17:50:27,000 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-30 17:50:27,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:50:27,002 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:27,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:50:27,010 INFO L130 PetriNetUnfolder]: 29/130 cut-off events. [2023-08-30 17:50:27,010 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:50:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:27,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:50:27,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -75054849, now seen corresponding path program 1 times [2023-08-30 17:50:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:27,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17876215] [2023-08-30 17:50:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:27,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:27,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:50:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:27,038 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:50:27,039 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:50:27,039 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:50:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 17:50:27,039 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:50:27,040 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:50:27,040 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:50:27,040 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:50:27,059 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:50:27,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2023-08-30 17:50:27,155 INFO L130 PetriNetUnfolder]: 140/879 cut-off events. [2023-08-30 17:50:27,155 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:50:27,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 879 events. 140/879 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3954 event pairs, 23 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 603. Up to 80 conditions per place. [2023-08-30 17:50:27,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 570 flow [2023-08-30 17:50:27,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 570 flow [2023-08-30 17:50:27,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:27,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 570 flow [2023-08-30 17:50:27,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 570 flow [2023-08-30 17:50:27,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2023-08-30 17:50:27,261 INFO L130 PetriNetUnfolder]: 140/879 cut-off events. [2023-08-30 17:50:27,261 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:50:27,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 879 events. 140/879 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3954 event pairs, 23 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 603. Up to 80 conditions per place. [2023-08-30 17:50:27,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 38610 [2023-08-30 17:50:30,159 INFO L134 LiptonReduction]: Checked pairs total: 90571 [2023-08-30 17:50:30,159 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-30 17:50:30,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:50:30,161 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;@14f21f7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:30,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:50:30,162 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 17:50:30,162 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:50:30,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:30,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:50:30,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:50:30,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 76075035, now seen corresponding path program 1 times [2023-08-30 17:50:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370504343] [2023-08-30 17:50:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370504343] [2023-08-30 17:50:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370504343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:50:30,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:50:30,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:50:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407138087] [2023-08-30 17:50:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:50:30,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:50:30,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:50:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:50:30,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 431 [2023-08-30 17:50:30,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:50:30,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:30,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 431 [2023-08-30 17:50:30,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand