./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_ok_longest.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/queue_ok_longest.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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:38:23,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:38:23,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:38:23,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:38:23,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:38:23,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:38:23,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:38:23,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:38:23,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:38:23,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:38:23,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:38:23,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:38:23,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:38:23,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:38:23,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:38:23,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:38:23,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:38:23,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:38:23,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:38:23,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:38:23,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:38:23,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:38:23,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:38:23,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:38:23,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:38:23,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:38:23,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:38:23,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:38:23,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:38:23,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:38:23,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:38:23,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:38:23,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:38:23,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:38:23,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:38:23,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:38:23,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:38:23,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:38:23,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:38:23,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:38:23,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:38:23,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:38:23,307 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:38:23,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:38:23,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:38:23,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:38:23,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:38:23,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:38:23,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:38:23,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:38:23,311 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:38:23,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:38:23,312 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:38:23,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:38:23,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:38:23,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:38:23,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:38:23,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:38:23,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:38:23,314 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:38:23,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:38:23,314 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:38:23,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:38:23,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:38:23,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:38:23,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:38:23,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:38:23,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:38:23,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:38:23,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:38:23,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:38:23,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:38:23,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:38:23,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:38:23,317 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:38:23,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:38:23,317 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:38:23,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:38:23,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:38:23,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:38:23,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:38:23,615 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:38:23,615 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:38:23,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longest.i [2023-08-30 22:38:24,695 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:38:24,951 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:38:24,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i [2023-08-30 22:38:24,979 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fcbc6ff/41cd3d24771d4d5e9d0c9bf02340b8ca/FLAG8824b986b [2023-08-30 22:38:24,989 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fcbc6ff/41cd3d24771d4d5e9d0c9bf02340b8ca [2023-08-30 22:38:24,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:38:24,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:38:24,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:38:24,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:38:24,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:38:24,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:38:24" (1/1) ... [2023-08-30 22:38:24,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205d06ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:24, skipping insertion in model container [2023-08-30 22:38:24,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:38:24" (1/1) ... [2023-08-30 22:38:25,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:38:25,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:38:25,396 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2023-08-30 22:38:25,403 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2023-08-30 22:38:25,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:38:25,422 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:38:25,476 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2023-08-30 22:38:25,481 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2023-08-30 22:38:25,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:38:25,552 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:38:25,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25 WrapperNode [2023-08-30 22:38:25,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:38:25,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:38:25,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:38:25,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:38:25,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,628 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2023-08-30 22:38:25,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:38:25,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:38:25,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:38:25,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:38:25,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:38:25,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:38:25,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:38:25,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:38:25,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (1/1) ... [2023-08-30 22:38:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:38:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:25,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 22:38:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 22:38:25,756 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 22:38:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 22:38:25,757 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 22:38:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:38:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:38:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:38:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:38:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 22:38:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:38:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:38:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:38:25,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:38:25,759 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:38:25,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 22:38:25,936 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:38:25,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:38:26,261 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:38:26,268 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:38:26,268 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:38:26,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:38:26 BoogieIcfgContainer [2023-08-30 22:38:26,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:38:26,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:38:26,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:38:26,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:38:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:38:24" (1/3) ... [2023-08-30 22:38:26,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34a090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:38:26, skipping insertion in model container [2023-08-30 22:38:26,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:38:25" (2/3) ... [2023-08-30 22:38:26,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34a090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:38:26, skipping insertion in model container [2023-08-30 22:38:26,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:38:26" (3/3) ... [2023-08-30 22:38:26,276 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-08-30 22:38:26,283 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:38:26,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:38:26,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 22:38:26,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:38:26,364 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 22:38:26,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 216 transitions, 448 flow [2023-08-30 22:38:26,500 INFO L130 PetriNetUnfolder]: 13/214 cut-off events. [2023-08-30 22:38:26,500 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:38:26,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 13/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 359 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 141. Up to 3 conditions per place. [2023-08-30 22:38:26,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 216 transitions, 448 flow [2023-08-30 22:38:26,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 205 transitions, 419 flow [2023-08-30 22:38:26,520 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:38:26,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 205 transitions, 419 flow [2023-08-30 22:38:26,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 205 transitions, 419 flow [2023-08-30 22:38:26,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 205 transitions, 419 flow [2023-08-30 22:38:26,603 INFO L130 PetriNetUnfolder]: 13/205 cut-off events. [2023-08-30 22:38:26,604 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:38:26,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 205 events. 13/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 141. Up to 3 conditions per place. [2023-08-30 22:38:26,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 9984 [2023-08-30 22:38:33,441 INFO L134 LiptonReduction]: Checked pairs total: 19772 [2023-08-30 22:38:33,441 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-30 22:38:33,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:38:33,458 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;@7bcfa47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:38:33,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:38:33,460 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 22:38:33,460 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:38:33,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:33,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 22:38:33,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:33,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash 839, now seen corresponding path program 1 times [2023-08-30 22:38:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:33,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152692614] [2023-08-30 22:38:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:33,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:33,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152692614] [2023-08-30 22:38:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152692614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:38:33,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:38:33,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 22:38:33,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228105181] [2023-08-30 22:38:33,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:38:33,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:38:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:33,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:38:33,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:38:33,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 402 [2023-08-30 22:38:33,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:33,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:33,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 402 [2023-08-30 22:38:33,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:33,868 INFO L130 PetriNetUnfolder]: 829/1341 cut-off events. [2023-08-30 22:38:33,868 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-08-30 22:38:33,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1341 events. 829/1341 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5736 event pairs, 621 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 2519. Up to 1297 conditions per place. [2023-08-30 22:38:33,876 INFO L137 encePairwiseOnDemand]: 401/402 looper letters, 38 selfloop transitions, 0 changer transitions 1/46 dead transitions. [2023-08-30 22:38:33,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 179 flow [2023-08-30 22:38:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:38:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:38:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 450 transitions. [2023-08-30 22:38:33,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597014925373134 [2023-08-30 22:38:33,898 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 450 transitions. [2023-08-30 22:38:33,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 450 transitions. [2023-08-30 22:38:33,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:33,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 450 transitions. [2023-08-30 22:38:33,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:33,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:33,913 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:33,915 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 103 flow. Second operand 2 states and 450 transitions. [2023-08-30 22:38:33,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 179 flow [2023-08-30 22:38:33,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:38:33,919 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-30 22:38:33,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 22:38:33,924 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-30 22:38:33,924 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-30 22:38:33,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:33,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:33,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:33,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:38:33,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:33,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1319934340, now seen corresponding path program 1 times [2023-08-30 22:38:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020458219] [2023-08-30 22:38:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:34,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020458219] [2023-08-30 22:38:34,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020458219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:38:34,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:38:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:38:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131782971] [2023-08-30 22:38:34,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:38:34,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:38:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:38:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:38:34,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 22:38:34,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:34,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 22:38:34,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:34,274 INFO L130 PetriNetUnfolder]: 197/403 cut-off events. [2023-08-30 22:38:34,275 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 22:38:34,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 403 events. 197/403 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1584 event pairs, 125 based on Foata normal form. 28/391 useless extension candidates. Maximal degree in co-relation 808. Up to 193 conditions per place. [2023-08-30 22:38:34,277 INFO L137 encePairwiseOnDemand]: 398/402 looper letters, 40 selfloop transitions, 2 changer transitions 5/52 dead transitions. [2023-08-30 22:38:34,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 203 flow [2023-08-30 22:38:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:38:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:38:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-08-30 22:38:34,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364842454394693 [2023-08-30 22:38:34,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-08-30 22:38:34,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-08-30 22:38:34,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:34,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-08-30 22:38:34,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,285 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 647 transitions. [2023-08-30 22:38:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 203 flow [2023-08-30 22:38:34,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:38:34,287 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 98 flow [2023-08-30 22:38:34,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-30 22:38:34,288 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-30 22:38:34,288 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 98 flow [2023-08-30 22:38:34,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:34,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:38:34,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:34,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash -312369892, now seen corresponding path program 1 times [2023-08-30 22:38:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984110299] [2023-08-30 22:38:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:34,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:34,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984110299] [2023-08-30 22:38:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984110299] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:38:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:38:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:38:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662584435] [2023-08-30 22:38:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:38:34,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:38:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:38:34,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:38:34,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 402 [2023-08-30 22:38:34,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:34,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 402 [2023-08-30 22:38:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:34,470 INFO L130 PetriNetUnfolder]: 245/498 cut-off events. [2023-08-30 22:38:34,470 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 22:38:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 498 events. 245/498 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1823 event pairs, 155 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 1028. Up to 357 conditions per place. [2023-08-30 22:38:34,473 INFO L137 encePairwiseOnDemand]: 398/402 looper letters, 48 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-30 22:38:34,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 230 flow [2023-08-30 22:38:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:38:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:38:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 22:38:34,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543117744610282 [2023-08-30 22:38:34,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 22:38:34,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 22:38:34,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:34,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 22:38:34,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,480 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 98 flow. Second operand 3 states and 655 transitions. [2023-08-30 22:38:34,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 230 flow [2023-08-30 22:38:34,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:38:34,482 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 113 flow [2023-08-30 22:38:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-30 22:38:34,483 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-30 22:38:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 113 flow [2023-08-30 22:38:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:34,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:38:34,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:34,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash -824947493, now seen corresponding path program 1 times [2023-08-30 22:38:34,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:34,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721969838] [2023-08-30 22:38:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:34,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721969838] [2023-08-30 22:38:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721969838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:38:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:38:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:38:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856584307] [2023-08-30 22:38:34,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:38:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:38:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:38:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:38:34,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 402 [2023-08-30 22:38:34,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:34,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 402 [2023-08-30 22:38:34,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:34,744 INFO L130 PetriNetUnfolder]: 230/513 cut-off events. [2023-08-30 22:38:34,744 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 22:38:34,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 513 events. 230/513 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2000 event pairs, 29 based on Foata normal form. 42/525 useless extension candidates. Maximal degree in co-relation 1099. Up to 407 conditions per place. [2023-08-30 22:38:34,746 INFO L137 encePairwiseOnDemand]: 398/402 looper letters, 43 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-30 22:38:34,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 222 flow [2023-08-30 22:38:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:38:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:38:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 22:38:34,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339966832504146 [2023-08-30 22:38:34,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 22:38:34,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 22:38:34,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:34,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 22:38:34,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,754 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 113 flow. Second operand 3 states and 644 transitions. [2023-08-30 22:38:34,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 222 flow [2023-08-30 22:38:34,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:38:34,756 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 114 flow [2023-08-30 22:38:34,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 22:38:34,757 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-30 22:38:34,757 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 114 flow [2023-08-30 22:38:34,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:34,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:34,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:34,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:38:34,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:34,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash 818194887, now seen corresponding path program 1 times [2023-08-30 22:38:34,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:34,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701969172] [2023-08-30 22:38:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:34,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:34,823 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 22:38:34,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701969172] [2023-08-30 22:38:34,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701969172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:38:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106790211] [2023-08-30 22:38:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:34,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:34,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:34,829 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 22:38:34,868 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 22:38:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 22:38:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:38:35,010 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 22:38:35,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:38:35,034 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 22:38:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106790211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:38:35,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:38:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 22:38:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633250892] [2023-08-30 22:38:35,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:38:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 22:38:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 22:38:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 22:38:35,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 22:38:35,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:35,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:35,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 22:38:35,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:35,199 INFO L130 PetriNetUnfolder]: 246/536 cut-off events. [2023-08-30 22:38:35,200 INFO L131 PetriNetUnfolder]: For 36/38 co-relation queries the response was YES. [2023-08-30 22:38:35,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 536 events. 246/536 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1552 event pairs, 100 based on Foata normal form. 12/512 useless extension candidates. Maximal degree in co-relation 1199. Up to 238 conditions per place. [2023-08-30 22:38:35,202 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 70 selfloop transitions, 10 changer transitions 1/85 dead transitions. [2023-08-30 22:38:35,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 372 flow [2023-08-30 22:38:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:38:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:38:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-30 22:38:35,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319237147595357 [2023-08-30 22:38:35,206 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-30 22:38:35,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-30 22:38:35,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:35,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-30 22:38:35,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:35,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 402.0) internal successors, (2814), 7 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:35,213 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 402.0) internal successors, (2814), 7 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:35,213 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 114 flow. Second operand 6 states and 1283 transitions. [2023-08-30 22:38:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 372 flow [2023-08-30 22:38:35,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:38:35,216 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 172 flow [2023-08-30 22:38:35,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 22:38:35,216 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-08-30 22:38:35,217 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 172 flow [2023-08-30 22:38:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:35,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:35,218 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:35,228 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 22:38:35,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:35,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:35,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1030938622, now seen corresponding path program 2 times [2023-08-30 22:38:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:35,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320966913] [2023-08-30 22:38:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:35,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:35,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:35,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320966913] [2023-08-30 22:38:35,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320966913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:38:35,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130808450] [2023-08-30 22:38:35,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:38:35,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:35,590 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 22:38:35,592 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 22:38:35,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:38:35,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:38:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 22:38:35,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:38:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:35,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:38:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:35,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130808450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:38:35,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:38:35,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 22:38:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081518783] [2023-08-30 22:38:35,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:38:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 22:38:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 22:38:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 22:38:35,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 22:38:35,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 205.84615384615384) internal successors, (2676), 13 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:35,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:35,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 22:38:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:36,322 INFO L130 PetriNetUnfolder]: 423/937 cut-off events. [2023-08-30 22:38:36,322 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-08-30 22:38:36,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 937 events. 423/937 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2594 event pairs, 91 based on Foata normal form. 24/903 useless extension candidates. Maximal degree in co-relation 2360. Up to 217 conditions per place. [2023-08-30 22:38:36,327 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 136 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2023-08-30 22:38:36,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 162 transitions, 838 flow [2023-08-30 22:38:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 22:38:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 22:38:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2564 transitions. [2023-08-30 22:38:36,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315091210613598 [2023-08-30 22:38:36,335 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2564 transitions. [2023-08-30 22:38:36,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2564 transitions. [2023-08-30 22:38:36,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:36,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2564 transitions. [2023-08-30 22:38:36,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.66666666666666) internal successors, (2564), 12 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:36,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 402.0) internal successors, (5226), 13 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:36,350 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 402.0) internal successors, (5226), 13 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:36,350 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 172 flow. Second operand 12 states and 2564 transitions. [2023-08-30 22:38:36,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 162 transitions, 838 flow [2023-08-30 22:38:36,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 162 transitions, 799 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-30 22:38:36,358 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 322 flow [2023-08-30 22:38:36,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-30 22:38:36,359 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 24 predicate places. [2023-08-30 22:38:36,359 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 322 flow [2023-08-30 22:38:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.84615384615384) internal successors, (2676), 13 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:36,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:36,360 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:36,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 22:38:36,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 22:38:36,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:36,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:36,567 INFO L85 PathProgramCache]: Analyzing trace with hash -122187422, now seen corresponding path program 3 times [2023-08-30 22:38:36,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:36,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325156308] [2023-08-30 22:38:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:36,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:36,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:36,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325156308] [2023-08-30 22:38:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325156308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:38:36,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780688051] [2023-08-30 22:38:36,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 22:38:36,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:36,989 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 22:38:36,995 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 22:38:37,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 22:38:37,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:38:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 22:38:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:38:37,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 22:38:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:38:37,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 22:38:38,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:38:38,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 22:38:38,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-30 22:38:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-08-30 22:38:38,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:38:38,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:38:38,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 42 [2023-08-30 22:38:38,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:38:38,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2023-08-30 22:38:38,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2023-08-30 22:38:38,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-08-30 22:38:38,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:38:38,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2023-08-30 22:38:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-08-30 22:38:38,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780688051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:38:38,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:38:38,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-08-30 22:38:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385890975] [2023-08-30 22:38:38,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:38:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 22:38:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 22:38:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=473, Unknown=4, NotChecked=0, Total=600 [2023-08-30 22:38:39,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 402 [2023-08-30 22:38:39,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 322 flow. Second operand has 25 states, 25 states have (on average 156.6) internal successors, (3915), 25 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:39,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:39,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 402 [2023-08-30 22:38:39,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:41,459 INFO L130 PetriNetUnfolder]: 821/1809 cut-off events. [2023-08-30 22:38:41,459 INFO L131 PetriNetUnfolder]: For 1316/1316 co-relation queries the response was YES. [2023-08-30 22:38:41,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4870 conditions, 1809 events. 821/1809 cut-off events. For 1316/1316 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6526 event pairs, 57 based on Foata normal form. 8/1746 useless extension candidates. Maximal degree in co-relation 4853. Up to 285 conditions per place. [2023-08-30 22:38:41,468 INFO L137 encePairwiseOnDemand]: 390/402 looper letters, 267 selfloop transitions, 110 changer transitions 1/381 dead transitions. [2023-08-30 22:38:41,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 381 transitions, 2042 flow [2023-08-30 22:38:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 22:38:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 22:38:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6885 transitions. [2023-08-30 22:38:41,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982992016660882 [2023-08-30 22:38:41,486 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6885 transitions. [2023-08-30 22:38:41,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6885 transitions. [2023-08-30 22:38:41,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:41,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6885 transitions. [2023-08-30 22:38:41,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 160.11627906976744) internal successors, (6885), 43 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:41,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 402.0) internal successors, (17688), 44 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:41,533 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 402.0) internal successors, (17688), 44 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:41,533 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 322 flow. Second operand 43 states and 6885 transitions. [2023-08-30 22:38:41,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 381 transitions, 2042 flow [2023-08-30 22:38:41,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 381 transitions, 2027 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:38:41,543 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 1174 flow [2023-08-30 22:38:41,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1174, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2023-08-30 22:38:41,544 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 88 predicate places. [2023-08-30 22:38:41,544 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 1174 flow [2023-08-30 22:38:41,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 156.6) internal successors, (3915), 25 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:41,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:41,546 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:41,555 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 22:38:41,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:41,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:41,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:41,753 INFO L85 PathProgramCache]: Analyzing trace with hash -161773555, now seen corresponding path program 1 times [2023-08-30 22:38:41,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:41,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463569422] [2023-08-30 22:38:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:41,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463569422] [2023-08-30 22:38:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463569422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:38:42,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966859791] [2023-08-30 22:38:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:42,167 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 22:38:42,197 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 22:38:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 22:38:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:38:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:42,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:38:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:42,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966859791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:38:42,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:38:42,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-08-30 22:38:42,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698765224] [2023-08-30 22:38:42,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:38:42,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 22:38:42,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 22:38:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-08-30 22:38:42,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 22:38:42,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 1174 flow. Second operand has 27 states, 27 states have (on average 206.25925925925927) internal successors, (5569), 27 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:42,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:42,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 22:38:42,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:43,918 INFO L130 PetriNetUnfolder]: 1371/3215 cut-off events. [2023-08-30 22:38:43,918 INFO L131 PetriNetUnfolder]: For 28289/28289 co-relation queries the response was YES. [2023-08-30 22:38:43,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14009 conditions, 3215 events. 1371/3215 cut-off events. For 28289/28289 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11621 event pairs, 136 based on Foata normal form. 104/3295 useless extension candidates. Maximal degree in co-relation 13966. Up to 452 conditions per place. [2023-08-30 22:38:43,944 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 413 selfloop transitions, 75 changer transitions 0/492 dead transitions. [2023-08-30 22:38:43,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 492 transitions, 5505 flow [2023-08-30 22:38:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 22:38:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 22:38:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5553 transitions. [2023-08-30 22:38:43,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5312858783008036 [2023-08-30 22:38:43,956 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5553 transitions. [2023-08-30 22:38:43,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5553 transitions. [2023-08-30 22:38:43,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:43,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5553 transitions. [2023-08-30 22:38:43,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 213.57692307692307) internal successors, (5553), 26 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:43,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 402.0) internal successors, (10854), 27 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:43,982 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 402.0) internal successors, (10854), 27 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:43,982 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 1174 flow. Second operand 26 states and 5553 transitions. [2023-08-30 22:38:43,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 492 transitions, 5505 flow [2023-08-30 22:38:44,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 492 transitions, 5318 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-30 22:38:44,030 INFO L231 Difference]: Finished difference. Result has 163 places, 202 transitions, 1744 flow [2023-08-30 22:38:44,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1744, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2023-08-30 22:38:44,033 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 116 predicate places. [2023-08-30 22:38:44,033 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 1744 flow [2023-08-30 22:38:44,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 206.25925925925927) internal successors, (5569), 27 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:44,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:44,035 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:44,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 22:38:44,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:44,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:44,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash -346057744, now seen corresponding path program 2 times [2023-08-30 22:38:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247013056] [2023-08-30 22:38:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:45,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:45,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247013056] [2023-08-30 22:38:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247013056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:38:45,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599206508] [2023-08-30 22:38:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:38:45,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:45,545 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 22:38:45,567 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 22:38:45,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:38:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:38:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 22:38:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:38:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:46,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:38:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:47,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599206508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:38:47,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:38:47,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-08-30 22:38:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946024557] [2023-08-30 22:38:47,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:38:47,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 22:38:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:38:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 22:38:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-08-30 22:38:47,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 22:38:47,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 1744 flow. Second operand has 53 states, 53 states have (on average 206.41509433962264) internal successors, (10940), 53 states have internal predecessors, (10940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:47,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:38:47,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 22:38:47,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:38:49,741 INFO L130 PetriNetUnfolder]: 2697/6387 cut-off events. [2023-08-30 22:38:49,741 INFO L131 PetriNetUnfolder]: For 100006/100006 co-relation queries the response was YES. [2023-08-30 22:38:49,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29612 conditions, 6387 events. 2697/6387 cut-off events. For 100006/100006 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 23275 event pairs, 136 based on Foata normal form. 208/6571 useless extension candidates. Maximal degree in co-relation 29556. Up to 1128 conditions per place. [2023-08-30 22:38:49,811 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 829 selfloop transitions, 153 changer transitions 0/986 dead transitions. [2023-08-30 22:38:49,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 986 transitions, 11797 flow [2023-08-30 22:38:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 22:38:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 22:38:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 11104 transitions. [2023-08-30 22:38:49,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311902028319939 [2023-08-30 22:38:49,827 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 11104 transitions. [2023-08-30 22:38:49,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 11104 transitions. [2023-08-30 22:38:49,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:38:49,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 11104 transitions. [2023-08-30 22:38:49,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 213.53846153846155) internal successors, (11104), 52 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:49,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 402.0) internal successors, (21306), 53 states have internal predecessors, (21306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:49,877 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 402.0) internal successors, (21306), 53 states have internal predecessors, (21306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:49,878 INFO L175 Difference]: Start difference. First operand has 163 places, 202 transitions, 1744 flow. Second operand 52 states and 11104 transitions. [2023-08-30 22:38:49,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 986 transitions, 11797 flow [2023-08-30 22:38:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 986 transitions, 11734 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 22:38:50,085 INFO L231 Difference]: Finished difference. Result has 230 places, 282 transitions, 3412 flow [2023-08-30 22:38:50,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3412, PETRI_PLACES=230, PETRI_TRANSITIONS=282} [2023-08-30 22:38:50,087 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 183 predicate places. [2023-08-30 22:38:50,087 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 282 transitions, 3412 flow [2023-08-30 22:38:50,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 206.41509433962264) internal successors, (10940), 53 states have internal predecessors, (10940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:38:50,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:38:50,090 INFO L208 CegarLoopForPetriNet]: trace histogram [50, 50, 50, 50, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:38:50,103 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 22:38:50,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:50,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:38:50,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:38:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash 890330880, now seen corresponding path program 3 times [2023-08-30 22:38:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:38:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698373560] [2023-08-30 22:38:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:38:50,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:38:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:38:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7675 backedges. 0 proven. 7675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:38:54,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:38:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698373560] [2023-08-30 22:38:54,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698373560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:38:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405629665] [2023-08-30 22:38:54,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 22:38:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:38:54,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:38:54,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:38:54,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 22:38:55,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 22:38:55,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:38:55,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 22:38:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:38:56,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 22:38:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:38:56,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 22:38:56,827 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:38:56,835 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 22:38:56,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 22:38:56,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 22:38:57,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-08-30 22:38:57,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:38:57,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 22:38:57,167 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:38:57,176 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-08-30 22:38:57,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 22:38:57,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 22:38:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7675 backedges. 644 proven. 245 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2023-08-30 22:38:57,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:38:57,394 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2173 (Array Int Int))) (not (= 800 (let ((.cse1 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse0 (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2175)) .cse1))))) is different from false [2023-08-30 22:38:57,405 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (or (< (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1) v_ArrVal_2171) (not (= (let ((.cse1 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2175)) .cse1)) 800)))) is different from false [2023-08-30 22:38:57,417 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse1 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2171) (not (= (let ((.cse3 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store .cse0 .cse1 v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse2 (+ |c_~#queue~0.offset| (* (select .cse2 .cse3) 4)) v_ArrVal_2175)) .cse3)) 800))))) is different from false [2023-08-30 22:38:57,437 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2169 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (or (not (= (let ((.cse1 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2169) .cse3 v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2175)) .cse1)) 800)) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2171)))) is different from false [2023-08-30 22:38:57,463 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2167 Int) (v_ArrVal_2169 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (let ((.cse0 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2167)) (.cse1 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2171) (not (= 800 (let ((.cse3 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2169) .cse1 v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse2 (+ (* (select .cse2 .cse3) 4) |c_~#queue~0.offset|) v_ArrVal_2175)) .cse3))))))) is different from false [2023-08-30 22:38:59,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:38:59,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 129 [2023-08-30 22:38:59,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:38:59,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 212 [2023-08-30 22:38:59,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-30 22:38:59,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-08-30 22:38:59,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 22:38:59,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:38:59,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 71 [2023-08-30 22:39:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7675 backedges. 332 proven. 241 refuted. 48 times theorem prover too weak. 6786 trivial. 268 not checked. [2023-08-30 22:39:02,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405629665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:39:02,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:39:02,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 11, 13] total 75 [2023-08-30 22:39:02,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631601685] [2023-08-30 22:39:02,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:39:02,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-08-30 22:39:02,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:39:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-08-30 22:39:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=3349, Unknown=10, NotChecked=700, Total=5550 [2023-08-30 22:39:02,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 402 [2023-08-30 22:39:02,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 282 transitions, 3412 flow. Second operand has 75 states, 75 states have (on average 155.26666666666668) internal successors, (11645), 75 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:39:02,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:39:02,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 402 [2023-08-30 22:39:02,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:40:26,915 INFO L130 PetriNetUnfolder]: 5789/13261 cut-off events. [2023-08-30 22:40:26,916 INFO L131 PetriNetUnfolder]: For 195510/195510 co-relation queries the response was YES. [2023-08-30 22:40:26,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67371 conditions, 13261 events. 5789/13261 cut-off events. For 195510/195510 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 61988 event pairs, 213 based on Foata normal form. 408/13633 useless extension candidates. Maximal degree in co-relation 67288. Up to 2163 conditions per place. [2023-08-30 22:40:27,042 INFO L137 encePairwiseOnDemand]: 386/402 looper letters, 1958 selfloop transitions, 1567 changer transitions 1/3529 dead transitions. [2023-08-30 22:40:27,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 3529 transitions, 35163 flow [2023-08-30 22:40:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 521 states. [2023-08-30 22:40:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2023-08-30 22:40:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 81260 transitions. [2023-08-30 22:40:27,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879833080279982 [2023-08-30 22:40:27,136 INFO L72 ComplementDD]: Start complementDD. Operand 521 states and 81260 transitions. [2023-08-30 22:40:27,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 521 states and 81260 transitions. [2023-08-30 22:40:27,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:40:27,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 521 states and 81260 transitions. [2023-08-30 22:40:27,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 522 states, 521 states have (on average 155.96928982725527) internal successors, (81260), 521 states have internal predecessors, (81260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:40:27,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 522 states, 522 states have (on average 402.0) internal successors, (209844), 522 states have internal predecessors, (209844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:40:27,660 INFO L81 ComplementDD]: Finished complementDD. Result has 522 states, 522 states have (on average 402.0) internal successors, (209844), 522 states have internal predecessors, (209844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:40:27,660 INFO L175 Difference]: Start difference. First operand has 230 places, 282 transitions, 3412 flow. Second operand 521 states and 81260 transitions. [2023-08-30 22:40:27,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 3529 transitions, 35163 flow [2023-08-30 22:40:28,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 3529 transitions, 34944 flow, removed 0 selfloop flow, removed 23 redundant places. [2023-08-30 22:40:28,099 INFO L231 Difference]: Finished difference. Result has 983 places, 1809 transitions, 28626 flow [2023-08-30 22:40:28,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=521, PETRI_FLOW=28626, PETRI_PLACES=983, PETRI_TRANSITIONS=1809} [2023-08-30 22:40:28,100 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 936 predicate places. [2023-08-30 22:40:28,100 INFO L495 AbstractCegarLoop]: Abstraction has has 983 places, 1809 transitions, 28626 flow [2023-08-30 22:40:28,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 155.26666666666668) internal successors, (11645), 75 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:40:28,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:40:28,101 INFO L208 CegarLoopForPetriNet]: trace histogram [51, 51, 51, 51, 38, 38, 38, 38, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:40:28,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 22:40:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:40:28,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:40:28,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:40:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1940408699, now seen corresponding path program 4 times [2023-08-30 22:40:28,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:40:28,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723273530] [2023-08-30 22:40:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:40:28,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:40:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:40:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8691 backedges. 0 proven. 8691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:40:32,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:40:32,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723273530] [2023-08-30 22:40:32,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723273530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:40:32,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279225056] [2023-08-30 22:40:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 22:40:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:40:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:40:32,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:40:32,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 22:42:26,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 22:42:26,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:42:26,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 22:42:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:42:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8691 backedges. 0 proven. 8691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:42:27,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:42:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8691 backedges. 0 proven. 8691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:42:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279225056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:42:30,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:42:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-08-30 22:42:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220906685] [2023-08-30 22:42:30,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:42:30,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-08-30 22:42:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:42:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-08-30 22:42:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-08-30 22:42:30,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 22:42:30,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 983 places, 1809 transitions, 28626 flow. Second operand has 107 states, 107 states have (on average 206.69158878504672) internal successors, (22116), 107 states have internal predecessors, (22116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:42:30,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:42:30,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 22:42:30,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:43:12,050 INFO L130 PetriNetUnfolder]: 10300/25216 cut-off events. [2023-08-30 22:43:12,050 INFO L131 PetriNetUnfolder]: For 19688567/19688567 co-relation queries the response was YES. [2023-08-30 22:43:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700714 conditions, 25216 events. 10300/25216 cut-off events. For 19688567/19688567 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 122181 event pairs, 400 based on Foata normal form. 848/26028 useless extension candidates. Maximal degree in co-relation 700374. Up to 6939 conditions per place. [2023-08-30 22:43:13,251 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 3731 selfloop transitions, 522 changer transitions 0/4257 dead transitions. [2023-08-30 22:43:13,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 4257 transitions, 144094 flow [2023-08-30 22:43:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-30 22:43:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-30 22:43:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 22633 transitions. [2023-08-30 22:43:13,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311414624988267 [2023-08-30 22:43:13,272 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 22633 transitions. [2023-08-30 22:43:13,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 22633 transitions. [2023-08-30 22:43:13,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:43:13,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 22633 transitions. [2023-08-30 22:43:13,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 213.5188679245283) internal successors, (22633), 106 states have internal predecessors, (22633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:43:13,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 402.0) internal successors, (43014), 107 states have internal predecessors, (43014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:43:13,338 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 402.0) internal successors, (43014), 107 states have internal predecessors, (43014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:43:13,338 INFO L175 Difference]: Start difference. First operand has 983 places, 1809 transitions, 28626 flow. Second operand 106 states and 22633 transitions. [2023-08-30 22:43:13,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 4257 transitions, 144094 flow [2023-08-30 22:43:35,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 4257 transitions, 119312 flow, removed 10235 selfloop flow, removed 91 redundant places. [2023-08-30 22:43:35,747 INFO L231 Difference]: Finished difference. Result has 1051 places, 2073 transitions, 22082 flow [2023-08-30 22:43:35,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=16143, PETRI_DIFFERENCE_MINUEND_PLACES=892, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=22082, PETRI_PLACES=1051, PETRI_TRANSITIONS=2073} [2023-08-30 22:43:35,749 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1004 predicate places. [2023-08-30 22:43:35,749 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 2073 transitions, 22082 flow [2023-08-30 22:43:35,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 206.69158878504672) internal successors, (22116), 107 states have internal predecessors, (22116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:43:35,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:43:35,752 INFO L208 CegarLoopForPetriNet]: trace histogram [104, 104, 104, 104, 77, 77, 77, 77, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:43:35,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 22:43:35,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:43:35,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:43:35,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:43:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash 116668732, now seen corresponding path program 5 times [2023-08-30 22:43:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:43:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022502287] [2023-08-30 22:43:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:43:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:43:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:43:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36364 backedges. 0 proven. 36364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:43:47,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:43:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022502287] [2023-08-30 22:43:47,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022502287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:43:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38271881] [2023-08-30 22:43:47,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 22:43:47,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:43:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:43:47,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:43:47,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 22:43:50,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-08-30 22:43:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:43:50,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 197 conjunts are in the unsatisfiable core [2023-08-30 22:43:50,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:43:50,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 22:43:50,236 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 22:43:50,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 38 [2023-08-30 22:43:50,501 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:50,513 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 22:43:50,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 22:43:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:50,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 22:43:50,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2023-08-30 22:43:50,924 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 22:43:50,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-08-30 22:43:51,084 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:51,106 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 22:43:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 22:43:51,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:51,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 22:43:51,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2023-08-30 22:43:51,627 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 22:43:51,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-08-30 22:43:51,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:51,812 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 22:43:51,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 22:43:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:51,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 22:43:52,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2023-08-30 22:43:52,281 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 22:43:52,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-08-30 22:43:52,505 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:52,516 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 22:43:52,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 22:43:52,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:52,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 22:43:52,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-08-30 22:43:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:52,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 22:43:53,096 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:53,104 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 22:43:53,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 22:43:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:53,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 22:43:53,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-08-30 22:43:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:53,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 22:43:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:53,614 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 22:43:53,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 22:43:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:53,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 22:43:53,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-08-30 22:43:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:53,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 22:43:54,129 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:54,136 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 22:43:54,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 22:43:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:54,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 22:43:54,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-08-30 22:43:54,487 INFO L321 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-08-30 22:43:54,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-08-30 22:43:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 22:43:54,648 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 22:43:54,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 22:43:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:43:54,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 22:43:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36364 backedges. 12060 proven. 93 refuted. 0 times theorem prover too weak. 24211 trivial. 0 not checked. [2023-08-30 22:43:54,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15