./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/bounded_buffer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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 ../sv-benchmarks/c/pthread-complex/bounded_buffer.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 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:11:53,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:11:53,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:11:53,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:11:53,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:11:53,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:11:53,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:11:53,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:11:53,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:11:53,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:11:53,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:11:53,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:11:53,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:11:53,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:11:53,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:11:53,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:11:53,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:11:53,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:11:53,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:11:53,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:11:53,393 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:11:53,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:11:53,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:11:53,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:11:53,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:11:53,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:11:53,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:11:53,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:11:53,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:11:53,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:11:53,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:11:53,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:11:53,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:11:53,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:11:53,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:11:53,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:11:53,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:11:53,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:11:53,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:11:53,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:11:53,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:11:53,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:11:53,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:11:53,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:11:53,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:11:53,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:11:53,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:11:53,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:11:53,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:11:53,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:11:53,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:11:53,435 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:11:53,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:11:53,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:11:53,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:11:53,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:11:53,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:11:53,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:11:53,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:11:53,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:11:53,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:11:53,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:11:53,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:11:53,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:11:53,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:11:53,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:11:53,438 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:11:53,439 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:11:53,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:11:53,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 [2022-07-12 10:11:53,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:11:53,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:11:53,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:11:53,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:11:53,662 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:11:53,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-07-12 10:11:53,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0580f14d1/b86af4e1ac164e6f81b3ee7a8f0b6c53/FLAG96374a129 [2022-07-12 10:11:54,172 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:11:54,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-07-12 10:11:54,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0580f14d1/b86af4e1ac164e6f81b3ee7a8f0b6c53/FLAG96374a129 [2022-07-12 10:11:54,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0580f14d1/b86af4e1ac164e6f81b3ee7a8f0b6c53 [2022-07-12 10:11:54,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:11:54,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:11:54,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:11:54,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:11:54,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:11:54,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:11:54" (1/1) ... [2022-07-12 10:11:54,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba6e58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:54, skipping insertion in model container [2022-07-12 10:11:54,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:11:54" (1/1) ... [2022-07-12 10:11:54,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:11:54,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:11:55,077 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-07-12 10:11:55,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:11:55,099 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:11:55,148 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-07-12 10:11:55,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:11:55,237 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:11:55,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55 WrapperNode [2022-07-12 10:11:55,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:11:55,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:11:55,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:11:55,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:11:55,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,325 INFO L137 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 478 [2022-07-12 10:11:55,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:11:55,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:11:55,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:11:55,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:11:55,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:11:55,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:11:55,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:11:55,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:11:55,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (1/1) ... [2022-07-12 10:11:55,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:11:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:11:55,412 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) [2022-07-12 10:11:55,417 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 [2022-07-12 10:11:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2022-07-12 10:11:55,444 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2022-07-12 10:11:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:11:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:11:55,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:11:55,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:11:55,446 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2022-07-12 10:11:55,446 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2022-07-12 10:11:55,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:11:55,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:11:55,447 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:11:55,602 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:11:55,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:11:56,106 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:11:56,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:11:56,115 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-12 10:11:56,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:11:56 BoogieIcfgContainer [2022-07-12 10:11:56,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:11:56,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:11:56,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:11:56,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:11:56,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:11:54" (1/3) ... [2022-07-12 10:11:56,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548f7494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:11:56, skipping insertion in model container [2022-07-12 10:11:56,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:11:55" (2/3) ... [2022-07-12 10:11:56,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548f7494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:11:56, skipping insertion in model container [2022-07-12 10:11:56,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:11:56" (3/3) ... [2022-07-12 10:11:56,123 INFO L111 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2022-07-12 10:11:56,127 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:11:56,136 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:11:56,136 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:11:56,136 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:11:56,230 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:11:56,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 455 places, 504 transitions, 1030 flow [2022-07-12 10:11:56,506 INFO L129 PetriNetUnfolder]: 122/1098 cut-off events. [2022-07-12 10:11:56,507 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:11:56,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 1098 events. 122/1098 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6668 event pairs, 0 based on Foata normal form. 0/968 useless extension candidates. Maximal degree in co-relation 578. Up to 16 conditions per place. [2022-07-12 10:11:56,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 455 places, 504 transitions, 1030 flow [2022-07-12 10:11:56,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 455 places, 504 transitions, 1030 flow [2022-07-12 10:11:56,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:11:56,566 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a37ea2d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5178b90c [2022-07-12 10:11:56,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:11:56,578 INFO L129 PetriNetUnfolder]: 19/184 cut-off events. [2022-07-12 10:11:56,578 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:11:56,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:11:56,579 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:11:56,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:11:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:11:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 13293357, now seen corresponding path program 1 times [2022-07-12 10:11:56,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:11:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314553908] [2022-07-12 10:11:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:11:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:11:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:11:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:11:56,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:11:56,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314553908] [2022-07-12 10:11:56,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314553908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:11:56,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:11:56,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:11:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698222713] [2022-07-12 10:11:56,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:11:56,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:11:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:11:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:11:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:11:56,847 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 504 [2022-07-12 10:11:56,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 504 transitions, 1030 flow. Second operand has 5 states, 5 states have (on average 462.6) internal successors, (2313), 5 states have internal predecessors, (2313), 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) [2022-07-12 10:11:56,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:11:56,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 504 [2022-07-12 10:11:56,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:11:57,118 INFO L129 PetriNetUnfolder]: 87/1060 cut-off events. [2022-07-12 10:11:57,119 INFO L130 PetriNetUnfolder]: For 33/49 co-relation queries the response was YES. [2022-07-12 10:11:57,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 1060 events. 87/1060 cut-off events. For 33/49 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6480 event pairs, 0 based on Foata normal form. 63/1028 useless extension candidates. Maximal degree in co-relation 571. Up to 39 conditions per place. [2022-07-12 10:11:57,139 INFO L132 encePairwiseOnDemand]: 487/504 looper letters, 25 selfloop transitions, 4 changer transitions 0/489 dead transitions. [2022-07-12 10:11:57,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 489 transitions, 1058 flow [2022-07-12 10:11:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:11:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:11:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2352 transitions. [2022-07-12 10:11:57,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2022-07-12 10:11:57,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2352 transitions. [2022-07-12 10:11:57,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2352 transitions. [2022-07-12 10:11:57,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:11:57,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2352 transitions. [2022-07-12 10:11:57,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 470.4) internal successors, (2352), 5 states have internal predecessors, (2352), 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) [2022-07-12 10:11:57,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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) [2022-07-12 10:11:57,201 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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) [2022-07-12 10:11:57,203 INFO L186 Difference]: Start difference. First operand has 455 places, 504 transitions, 1030 flow. Second operand 5 states and 2352 transitions. [2022-07-12 10:11:57,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 489 transitions, 1058 flow [2022-07-12 10:11:57,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 489 transitions, 1058 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:11:57,217 INFO L242 Difference]: Finished difference. Result has 457 places, 489 transitions, 1008 flow [2022-07-12 10:11:57,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1008, PETRI_PLACES=457, PETRI_TRANSITIONS=489} [2022-07-12 10:11:57,222 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, 2 predicate places. [2022-07-12 10:11:57,222 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 489 transitions, 1008 flow [2022-07-12 10:11:57,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 462.6) internal successors, (2313), 5 states have internal predecessors, (2313), 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) [2022-07-12 10:11:57,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:11:57,224 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:11:57,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:11:57,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:11:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:11:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1703216025, now seen corresponding path program 1 times [2022-07-12 10:11:57,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:11:57,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898117900] [2022-07-12 10:11:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:11:57,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:11:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:11:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:11:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:11:57,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898117900] [2022-07-12 10:11:57,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898117900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:11:57,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:11:57,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:11:57,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204435195] [2022-07-12 10:11:57,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:11:57,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:11:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:11:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:11:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:11:57,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 504 [2022-07-12 10:11:57,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 489 transitions, 1008 flow. Second operand has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 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) [2022-07-12 10:11:57,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:11:57,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 504 [2022-07-12 10:11:57,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:11:57,529 INFO L129 PetriNetUnfolder]: 84/1054 cut-off events. [2022-07-12 10:11:57,529 INFO L130 PetriNetUnfolder]: For 33/37 co-relation queries the response was YES. [2022-07-12 10:11:57,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 1054 events. 84/1054 cut-off events. For 33/37 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6385 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1052. Up to 18 conditions per place. [2022-07-12 10:11:57,543 INFO L132 encePairwiseOnDemand]: 500/504 looper letters, 13 selfloop transitions, 1 changer transitions 0/483 dead transitions. [2022-07-12 10:11:57,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 483 transitions, 1024 flow [2022-07-12 10:11:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:11:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:11:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1430 transitions. [2022-07-12 10:11:57,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9457671957671958 [2022-07-12 10:11:57,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1430 transitions. [2022-07-12 10:11:57,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1430 transitions. [2022-07-12 10:11:57,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:11:57,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1430 transitions. [2022-07-12 10:11:57,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 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) [2022-07-12 10:11:57,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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) [2022-07-12 10:11:57,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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) [2022-07-12 10:11:57,553 INFO L186 Difference]: Start difference. First operand has 457 places, 489 transitions, 1008 flow. Second operand 3 states and 1430 transitions. [2022-07-12 10:11:57,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 483 transitions, 1024 flow [2022-07-12 10:11:57,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 483 transitions, 1016 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:11:57,562 INFO L242 Difference]: Finished difference. Result has 452 places, 483 transitions, 990 flow [2022-07-12 10:11:57,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=990, PETRI_PLACES=452, PETRI_TRANSITIONS=483} [2022-07-12 10:11:57,563 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, -3 predicate places. [2022-07-12 10:11:57,564 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 483 transitions, 990 flow [2022-07-12 10:11:57,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 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) [2022-07-12 10:11:57,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:11:57,565 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1] [2022-07-12 10:11:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:11:57,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:11:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:11:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash 688471773, now seen corresponding path program 1 times [2022-07-12 10:11:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:11:57,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910058793] [2022-07-12 10:11:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:11:57,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:11:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:11:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:11:57,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:11:57,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910058793] [2022-07-12 10:11:57,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910058793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:11:57,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:11:57,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:11:57,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536994576] [2022-07-12 10:11:57,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:11:57,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:11:57,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:11:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:11:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:11:57,680 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 504 [2022-07-12 10:11:57,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 483 transitions, 990 flow. Second operand has 5 states, 5 states have (on average 438.8) internal successors, (2194), 5 states have internal predecessors, (2194), 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) [2022-07-12 10:11:57,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:11:57,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 504 [2022-07-12 10:11:57,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:12:00,018 INFO L129 PetriNetUnfolder]: 2919/15709 cut-off events. [2022-07-12 10:12:00,018 INFO L130 PetriNetUnfolder]: For 140/228 co-relation queries the response was YES. [2022-07-12 10:12:00,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 15709 events. 2919/15709 cut-off events. For 140/228 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 182904 event pairs, 1464 based on Foata normal form. 0/14009 useless extension candidates. Maximal degree in co-relation 18760. Up to 2942 conditions per place. [2022-07-12 10:12:00,148 INFO L132 encePairwiseOnDemand]: 496/504 looper letters, 49 selfloop transitions, 6 changer transitions 1/483 dead transitions. [2022-07-12 10:12:00,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 483 transitions, 1102 flow [2022-07-12 10:12:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:12:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:12:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2232 transitions. [2022-07-12 10:12:00,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2022-07-12 10:12:00,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2232 transitions. [2022-07-12 10:12:00,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2232 transitions. [2022-07-12 10:12:00,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:12:00,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2232 transitions. [2022-07-12 10:12:00,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 446.4) internal successors, (2232), 5 states have internal predecessors, (2232), 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) [2022-07-12 10:12:00,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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) [2022-07-12 10:12:00,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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) [2022-07-12 10:12:00,162 INFO L186 Difference]: Start difference. First operand has 452 places, 483 transitions, 990 flow. Second operand 5 states and 2232 transitions. [2022-07-12 10:12:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 483 transitions, 1102 flow [2022-07-12 10:12:00,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 483 transitions, 1101 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:12:00,169 INFO L242 Difference]: Finished difference. Result has 454 places, 482 transitions, 1010 flow [2022-07-12 10:12:00,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1010, PETRI_PLACES=454, PETRI_TRANSITIONS=482} [2022-07-12 10:12:00,172 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, -1 predicate places. [2022-07-12 10:12:00,172 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 482 transitions, 1010 flow [2022-07-12 10:12:00,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 438.8) internal successors, (2194), 5 states have internal predecessors, (2194), 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) [2022-07-12 10:12:00,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:12:00,174 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:12:00,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:12:00,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:12:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:12:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1704620567, now seen corresponding path program 1 times [2022-07-12 10:12:00,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:12:00,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979179549] [2022-07-12 10:12:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:12:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:12:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:12:00,260 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:12:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:12:00,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:12:00,316 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:12:00,317 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:12:00,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:12:00,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-12 10:12:00,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:12:00,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:12:00,319 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:12:00,322 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:12:00,322 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:12:00,422 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-12 10:12:00,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 697 places, 774 transitions, 1596 flow [2022-07-12 10:12:01,315 INFO L129 PetriNetUnfolder]: 430/3582 cut-off events. [2022-07-12 10:12:01,316 INFO L130 PetriNetUnfolder]: For 72/84 co-relation queries the response was YES. [2022-07-12 10:12:01,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 3582 events. 430/3582 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 29170 event pairs, 2 based on Foata normal form. 0/3159 useless extension candidates. Maximal degree in co-relation 2004. Up to 64 conditions per place. [2022-07-12 10:12:01,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 697 places, 774 transitions, 1596 flow [2022-07-12 10:12:01,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 697 places, 774 transitions, 1596 flow [2022-07-12 10:12:01,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:12:01,471 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a37ea2d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5178b90c [2022-07-12 10:12:01,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:12:01,497 INFO L129 PetriNetUnfolder]: 39/412 cut-off events. [2022-07-12 10:12:01,497 INFO L130 PetriNetUnfolder]: For 11/13 co-relation queries the response was YES. [2022-07-12 10:12:01,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:12:01,498 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-07-12 10:12:01,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:12:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:12:01,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1094861806, now seen corresponding path program 1 times [2022-07-12 10:12:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:12:01,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609692602] [2022-07-12 10:12:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:12:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:12:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:12:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 10:12:01,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:12:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609692602] [2022-07-12 10:12:01,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609692602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:12:01,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:12:01,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:12:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216467539] [2022-07-12 10:12:01,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:12:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:12:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:12:01,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:12:01,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:12:01,571 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 719 out of 774 [2022-07-12 10:12:01,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 774 transitions, 1596 flow. Second operand has 5 states, 5 states have (on average 720.8) internal successors, (3604), 5 states have internal predecessors, (3604), 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) [2022-07-12 10:12:01,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:12:01,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 719 of 774 [2022-07-12 10:12:01,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:12:02,514 INFO L129 PetriNetUnfolder]: 315/3460 cut-off events. [2022-07-12 10:12:02,514 INFO L130 PetriNetUnfolder]: For 230/287 co-relation queries the response was YES. [2022-07-12 10:12:02,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 3460 events. 315/3460 cut-off events. For 230/287 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28761 event pairs, 1 based on Foata normal form. 411/3563 useless extension candidates. Maximal degree in co-relation 2017. Up to 130 conditions per place. [2022-07-12 10:12:02,670 INFO L132 encePairwiseOnDemand]: 752/774 looper letters, 31 selfloop transitions, 4 changer transitions 0/753 dead transitions. [2022-07-12 10:12:02,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 753 transitions, 1624 flow [2022-07-12 10:12:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:12:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:12:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3658 transitions. [2022-07-12 10:12:02,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.945219638242894 [2022-07-12 10:12:02,677 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3658 transitions. [2022-07-12 10:12:02,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3658 transitions. [2022-07-12 10:12:02,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:12:02,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3658 transitions. [2022-07-12 10:12:02,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 731.6) internal successors, (3658), 5 states have internal predecessors, (3658), 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) [2022-07-12 10:12:02,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 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) [2022-07-12 10:12:02,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 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) [2022-07-12 10:12:02,692 INFO L186 Difference]: Start difference. First operand has 697 places, 774 transitions, 1596 flow. Second operand 5 states and 3658 transitions. [2022-07-12 10:12:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 753 transitions, 1624 flow [2022-07-12 10:12:02,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 753 transitions, 1624 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:12:02,701 INFO L242 Difference]: Finished difference. Result has 698 places, 753 transitions, 1562 flow [2022-07-12 10:12:02,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1562, PETRI_PLACES=698, PETRI_TRANSITIONS=753} [2022-07-12 10:12:02,703 INFO L279 CegarLoopForPetriNet]: 697 programPoint places, 1 predicate places. [2022-07-12 10:12:02,703 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 753 transitions, 1562 flow [2022-07-12 10:12:02,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 720.8) internal successors, (3604), 5 states have internal predecessors, (3604), 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) [2022-07-12 10:12:02,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:12:02,705 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:12:02,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:12:02,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:12:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:12:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -409247448, now seen corresponding path program 1 times [2022-07-12 10:12:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:12:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309152525] [2022-07-12 10:12:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:12:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:12:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:12:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 10:12:02,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:12:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309152525] [2022-07-12 10:12:02,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309152525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:12:02,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:12:02,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:12:02,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399825381] [2022-07-12 10:12:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:12:02,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:12:02,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:12:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:12:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:12:02,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 774 [2022-07-12 10:12:02,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 753 transitions, 1562 flow. Second operand has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 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) [2022-07-12 10:12:02,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:12:02,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 774 [2022-07-12 10:12:02,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:12:03,606 INFO L129 PetriNetUnfolder]: 312/3454 cut-off events. [2022-07-12 10:12:03,606 INFO L130 PetriNetUnfolder]: For 224/245 co-relation queries the response was YES. [2022-07-12 10:12:03,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 3454 events. 312/3454 cut-off events. For 224/245 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28734 event pairs, 1 based on Foata normal form. 0/3149 useless extension candidates. Maximal degree in co-relation 3540. Up to 79 conditions per place. [2022-07-12 10:12:03,789 INFO L132 encePairwiseOnDemand]: 770/774 looper letters, 19 selfloop transitions, 1 changer transitions 0/747 dead transitions. [2022-07-12 10:12:03,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 747 transitions, 1590 flow [2022-07-12 10:12:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:12:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:12:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2210 transitions. [2022-07-12 10:12:03,794 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9517657192075797 [2022-07-12 10:12:03,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2210 transitions. [2022-07-12 10:12:03,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2210 transitions. [2022-07-12 10:12:03,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:12:03,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2210 transitions. [2022-07-12 10:12:03,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 736.6666666666666) internal successors, (2210), 3 states have internal predecessors, (2210), 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) [2022-07-12 10:12:03,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 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) [2022-07-12 10:12:03,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 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) [2022-07-12 10:12:03,803 INFO L186 Difference]: Start difference. First operand has 698 places, 753 transitions, 1562 flow. Second operand 3 states and 2210 transitions. [2022-07-12 10:12:03,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 747 transitions, 1590 flow [2022-07-12 10:12:03,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 747 transitions, 1582 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:12:03,813 INFO L242 Difference]: Finished difference. Result has 693 places, 747 transitions, 1544 flow [2022-07-12 10:12:03,814 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=693, PETRI_TRANSITIONS=747} [2022-07-12 10:12:03,815 INFO L279 CegarLoopForPetriNet]: 697 programPoint places, -4 predicate places. [2022-07-12 10:12:03,815 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 747 transitions, 1544 flow [2022-07-12 10:12:03,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 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) [2022-07-12 10:12:03,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:12:03,816 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 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] [2022-07-12 10:12:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:12:03,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:12:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:12:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1207477274, now seen corresponding path program 1 times [2022-07-12 10:12:03,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:12:03,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171879332] [2022-07-12 10:12:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:12:03,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:12:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:12:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 10:12:03,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:12:03,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171879332] [2022-07-12 10:12:03,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171879332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:12:03,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:12:03,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:12:03,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917288022] [2022-07-12 10:12:03,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:12:03,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:12:03,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:12:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:12:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:12:03,897 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 679 out of 774 [2022-07-12 10:12:03,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 747 transitions, 1544 flow. Second operand has 5 states, 5 states have (on average 683.0) internal successors, (3415), 5 states have internal predecessors, (3415), 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) [2022-07-12 10:12:03,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:12:03,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 679 of 774 [2022-07-12 10:12:03,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand