./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.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-deagle/circular_buffer_bad.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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --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 [2023-08-31 04:21:41,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:21:41,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:21:41,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:21:41,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:21:41,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:21:41,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:21:41,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:21:41,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:21:41,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:21:41,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:21:41,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:21:41,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:21:41,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:21:41,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:21:41,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:21:41,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:21:41,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:21:41,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:21:41,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:21:41,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:21:41,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:21:41,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:21:41,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:21:41,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:21:41,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:21:41,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:21:41,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:21:41,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:21:41,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:21:41,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:21:41,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:21:41,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:21:41,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:21:41,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:21:41,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:21:41,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:21:41,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:21:41,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:21:41,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:21:41,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:21:41,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:21:41,477 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:21:41,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:21:41,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:21:41,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:21:41,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:21:41,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:21:41,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:21:41,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:21:41,480 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:21:41,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:21:41,481 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:21:41,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:21:41,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:21:41,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:21:41,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:21:41,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:21:41,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:21:41,483 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:21:41,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:21:41,483 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:21:41,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:21:41,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:21:41,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:21:41,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:21:41,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:21:41,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:21:41,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:21:41,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:21:41,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:21:41,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:21:41,485 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:21:41,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:21:41,486 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:21:41,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:21:41,486 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:21:41,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:21:41,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:21:41,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:21:41,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:21:41,783 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:21:41,784 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:21:41,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-31 04:21:43,004 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:21:43,247 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:21:43,248 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-31 04:21:43,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097b5629e/dfca8f3851bd4acca216c15bd4b8a48d/FLAGa3adb016e [2023-08-31 04:21:43,289 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097b5629e/dfca8f3851bd4acca216c15bd4b8a48d [2023-08-31 04:21:43,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:21:43,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:21:43,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:21:43,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:21:43,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:21:43,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acd55c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43, skipping insertion in model container [2023-08-31 04:21:43,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:21:43,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:21:43,623 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-deagle/circular_buffer_bad.i[30440,30453] [2023-08-31 04:21:43,635 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-deagle/circular_buffer_bad.i[30895,30908] [2023-08-31 04:21:43,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:21:43,654 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:21:43,703 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-deagle/circular_buffer_bad.i[30440,30453] [2023-08-31 04:21:43,706 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-deagle/circular_buffer_bad.i[30895,30908] [2023-08-31 04:21:43,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:21:43,751 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:21:43,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43 WrapperNode [2023-08-31 04:21:43,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:21:43,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:21:43,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:21:43,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:21:43,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,824 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2023-08-31 04:21:43,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:21:43,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:21:43,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:21:43,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:21:43,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:21:43,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:21:43,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:21:43,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:21:43,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (1/1) ... [2023-08-31 04:21:43,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:21:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:43,926 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) [2023-08-31 04:21:43,951 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 [2023-08-31 04:21:43,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:21:43,970 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 04:21:43,970 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 04:21:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 04:21:43,971 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 04:21:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:21:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 04:21:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:21:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:21:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:21:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-31 04:21:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:21:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:21:43,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:21:43,973 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:21:44,171 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:21:44,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:21:44,420 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:21:44,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:21:44,428 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 04:21:44,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:21:44 BoogieIcfgContainer [2023-08-31 04:21:44,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:21:44,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:21:44,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:21:44,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:21:44,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:21:43" (1/3) ... [2023-08-31 04:21:44,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2383b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:21:44, skipping insertion in model container [2023-08-31 04:21:44,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:21:43" (2/3) ... [2023-08-31 04:21:44,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2383b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:21:44, skipping insertion in model container [2023-08-31 04:21:44,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:21:44" (3/3) ... [2023-08-31 04:21:44,453 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-08-31 04:21:44,461 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:21:44,469 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:21:44,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-31 04:21:44,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:21:44,570 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:21:44,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 296 flow [2023-08-31 04:21:44,761 INFO L130 PetriNetUnfolder]: 10/138 cut-off events. [2023-08-31 04:21:44,762 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:21:44,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 10/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-08-31 04:21:44,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 140 transitions, 296 flow [2023-08-31 04:21:44,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 129 transitions, 267 flow [2023-08-31 04:21:44,780 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:21:44,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 129 transitions, 267 flow [2023-08-31 04:21:44,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 129 transitions, 267 flow [2023-08-31 04:21:44,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 129 transitions, 267 flow [2023-08-31 04:21:44,852 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2023-08-31 04:21:44,853 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 04:21:44,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 129 events. 10/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 235 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-08-31 04:21:44,858 INFO L119 LiptonReduction]: Number of co-enabled transitions 3840 [2023-08-31 04:21:49,291 INFO L134 LiptonReduction]: Checked pairs total: 8363 [2023-08-31 04:21:49,291 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-31 04:21:49,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:21:49,308 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;@3ceb20e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:21:49,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 04:21:49,313 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2023-08-31 04:21:49,314 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 04:21:49,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:49,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:49,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:49,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1708763483, now seen corresponding path program 1 times [2023-08-31 04:21:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:49,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294697325] [2023-08-31 04:21:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:49,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:49,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:21:49,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838106551] [2023-08-31 04:21:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:49,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:49,461 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) [2023-08-31 04:21:49,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:21:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 04:21:49,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:49,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:21:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294697325] [2023-08-31 04:21:49,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:21:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838106551] [2023-08-31 04:21:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838106551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:49,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:49,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:21:49,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891365523] [2023-08-31 04:21:49,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:21:49,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:21:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:21:49,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 251 [2023-08-31 04:21:49,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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) [2023-08-31 04:21:49,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:49,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 251 [2023-08-31 04:21:49,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:49,856 INFO L130 PetriNetUnfolder]: 417/682 cut-off events. [2023-08-31 04:21:49,856 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-31 04:21:49,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 682 events. 417/682 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2735 event pairs, 297 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 1238. Up to 626 conditions per place. [2023-08-31 04:21:49,863 INFO L137 encePairwiseOnDemand]: 249/251 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-31 04:21:49,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 133 flow [2023-08-31 04:21:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:21:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:21:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-31 04:21:49,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378486055776892 [2023-08-31 04:21:49,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-31 04:21:49,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-31 04:21:49,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:49,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-31 04:21:49,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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) [2023-08-31 04:21:49,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:49,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:49,900 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 77 flow. Second operand 3 states and 405 transitions. [2023-08-31 04:21:49,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 133 flow [2023-08-31 04:21:49,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 04:21:49,904 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 72 flow [2023-08-31 04:21:49,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-08-31 04:21:49,909 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2023-08-31 04:21:49,910 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 72 flow [2023-08-31 04:21:49,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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) [2023-08-31 04:21:49,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:49,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:49,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:50,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-08-31 04:21:50,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:50,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 306299020, now seen corresponding path program 1 times [2023-08-31 04:21:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925121019] [2023-08-31 04:21:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:50,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925121019] [2023-08-31 04:21:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925121019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:50,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:21:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687039061] [2023-08-31 04:21:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:21:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:21:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:21:50,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 251 [2023-08-31 04:21:50,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-31 04:21:50,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:50,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 251 [2023-08-31 04:21:50,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:50,510 INFO L130 PetriNetUnfolder]: 592/999 cut-off events. [2023-08-31 04:21:50,511 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:21:50,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 999 events. 592/999 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3921 event pairs, 228 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 1995. Up to 585 conditions per place. [2023-08-31 04:21:50,517 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 46 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2023-08-31 04:21:50,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 219 flow [2023-08-31 04:21:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:21:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:21:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-31 04:21:50,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670650730411687 [2023-08-31 04:21:50,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-31 04:21:50,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-31 04:21:50,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:50,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-31 04:21:50,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2023-08-31 04:21:50,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:50,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:50,529 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 72 flow. Second operand 3 states and 427 transitions. [2023-08-31 04:21:50,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 219 flow [2023-08-31 04:21:50,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:21:50,531 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 84 flow [2023-08-31 04:21:50,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-31 04:21:50,532 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-31 04:21:50,533 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 84 flow [2023-08-31 04:21:50,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-31 04:21:50,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:50,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:50,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:21:50,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:50,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash 501019712, now seen corresponding path program 1 times [2023-08-31 04:21:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:50,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311146293] [2023-08-31 04:21:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311146293] [2023-08-31 04:21:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311146293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:50,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:50,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 04:21:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820189998] [2023-08-31 04:21:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:21:50,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:21:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:21:50,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 251 [2023-08-31 04:21:50,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-31 04:21:50,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:50,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 251 [2023-08-31 04:21:50,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:50,861 INFO L130 PetriNetUnfolder]: 342/599 cut-off events. [2023-08-31 04:21:50,861 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-31 04:21:50,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1261 conditions, 599 events. 342/599 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2266 event pairs, 64 based on Foata normal form. 26/569 useless extension candidates. Maximal degree in co-relation 1253. Up to 416 conditions per place. [2023-08-31 04:21:50,864 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 36 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-31 04:21:50,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 187 flow [2023-08-31 04:21:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:21:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:21:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-31 04:21:50,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549800796812749 [2023-08-31 04:21:50,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-31 04:21:50,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-31 04:21:50,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:50,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-31 04:21:50,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2023-08-31 04:21:50,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:50,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:50,871 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 3 states and 414 transitions. [2023-08-31 04:21:50,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 187 flow [2023-08-31 04:21:50,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:21:50,873 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 89 flow [2023-08-31 04:21:50,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-31 04:21:50,874 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-31 04:21:50,874 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 89 flow [2023-08-31 04:21:50,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-31 04:21:50,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:50,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:50,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:21:50,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:50,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash 944092763, now seen corresponding path program 1 times [2023-08-31 04:21:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010033928] [2023-08-31 04:21:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:51,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:51,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010033928] [2023-08-31 04:21:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010033928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:51,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:51,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:21:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610160287] [2023-08-31 04:21:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:21:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:21:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:21:51,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 251 [2023-08-31 04:21:51,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-31 04:21:51,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:51,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 251 [2023-08-31 04:21:51,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:51,159 INFO L130 PetriNetUnfolder]: 344/643 cut-off events. [2023-08-31 04:21:51,160 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-31 04:21:51,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 643 events. 344/643 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 129 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 1374. Up to 415 conditions per place. [2023-08-31 04:21:51,163 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 39 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2023-08-31 04:21:51,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 216 flow [2023-08-31 04:21:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:21:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:21:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-31 04:21:51,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537848605577689 [2023-08-31 04:21:51,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-31 04:21:51,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-31 04:21:51,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:51,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-31 04:21:51,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2023-08-31 04:21:51,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:51,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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) [2023-08-31 04:21:51,170 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 89 flow. Second operand 3 states and 417 transitions. [2023-08-31 04:21:51,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 216 flow [2023-08-31 04:21:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:21:51,173 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 97 flow [2023-08-31 04:21:51,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-31 04:21:51,175 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-31 04:21:51,175 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 97 flow [2023-08-31 04:21:51,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-31 04:21:51,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:51,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:51,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 04:21:51,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:51,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1856592171, now seen corresponding path program 1 times [2023-08-31 04:21:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313698864] [2023-08-31 04:21:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:51,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:21:51,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232418433] [2023-08-31 04:21:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:51,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:51,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:51,203 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) [2023-08-31 04:21:51,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:21:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:51,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:21:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:51,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:21:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313698864] [2023-08-31 04:21:51,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:21:51,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232418433] [2023-08-31 04:21:51,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232418433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:51,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:51,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 04:21:51,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827152360] [2023-08-31 04:21:51,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:21:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:21:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:21:51,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 251 [2023-08-31 04:21:51,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 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) [2023-08-31 04:21:51,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:51,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 251 [2023-08-31 04:21:51,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:51,771 INFO L130 PetriNetUnfolder]: 454/847 cut-off events. [2023-08-31 04:21:51,772 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-31 04:21:51,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 847 events. 454/847 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3324 event pairs, 115 based on Foata normal form. 8/818 useless extension candidates. Maximal degree in co-relation 1801. Up to 408 conditions per place. [2023-08-31 04:21:51,776 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 56 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-08-31 04:21:51,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 305 flow [2023-08-31 04:21:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:21:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:21:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2023-08-31 04:21:51,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388446215139442 [2023-08-31 04:21:51,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2023-08-31 04:21:51,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2023-08-31 04:21:51,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:51,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2023-08-31 04:21:51,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 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) [2023-08-31 04:21:51,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:51,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:51,783 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 97 flow. Second operand 4 states and 541 transitions. [2023-08-31 04:21:51,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 305 flow [2023-08-31 04:21:51,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:21:51,785 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 120 flow [2023-08-31 04:21:51,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-31 04:21:51,786 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-31 04:21:51,786 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 120 flow [2023-08-31 04:21:51,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 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) [2023-08-31 04:21:51,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:51,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:51,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:51,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:51,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:51,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1719788797, now seen corresponding path program 1 times [2023-08-31 04:21:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876291894] [2023-08-31 04:21:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:52,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:21:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508658921] [2023-08-31 04:21:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:52,012 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) [2023-08-31 04:21:52,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:21:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:21:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:21:52,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-31 04:21:52,303 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 04:21:52,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 04:21:52,338 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 13 treesize of output 15 [2023-08-31 04:21:52,455 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 51 treesize of output 44 [2023-08-31 04:21:52,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 53 [2023-08-31 04:21:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:52,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:21:52,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:52,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876291894] [2023-08-31 04:21:52,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:21:52,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508658921] [2023-08-31 04:21:52,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508658921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:52,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:52,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 04:21:52,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133348128] [2023-08-31 04:21:52,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:52,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 04:21:52,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 04:21:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-31 04:21:53,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 251 [2023-08-31 04:21:53,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 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) [2023-08-31 04:21:53,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:53,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 251 [2023-08-31 04:21:53,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:53,580 INFO L130 PetriNetUnfolder]: 1041/1922 cut-off events. [2023-08-31 04:21:53,580 INFO L131 PetriNetUnfolder]: For 254/262 co-relation queries the response was YES. [2023-08-31 04:21:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 1922 events. 1041/1922 cut-off events. For 254/262 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9485 event pairs, 266 based on Foata normal form. 34/1876 useless extension candidates. Maximal degree in co-relation 4157. Up to 635 conditions per place. [2023-08-31 04:21:53,590 INFO L137 encePairwiseOnDemand]: 239/251 looper letters, 106 selfloop transitions, 24 changer transitions 3/138 dead transitions. [2023-08-31 04:21:53,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 138 transitions, 663 flow [2023-08-31 04:21:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 04:21:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 04:21:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1233 transitions. [2023-08-31 04:21:53,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49123505976095616 [2023-08-31 04:21:53,595 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1233 transitions. [2023-08-31 04:21:53,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1233 transitions. [2023-08-31 04:21:53,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:53,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1233 transitions. [2023-08-31 04:21:53,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 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) [2023-08-31 04:21:53,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 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) [2023-08-31 04:21:53,603 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 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) [2023-08-31 04:21:53,603 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 120 flow. Second operand 10 states and 1233 transitions. [2023-08-31 04:21:53,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 138 transitions, 663 flow [2023-08-31 04:21:53,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 138 transitions, 650 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 04:21:53,609 INFO L231 Difference]: Finished difference. Result has 53 places, 61 transitions, 290 flow [2023-08-31 04:21:53,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2023-08-31 04:21:53,611 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2023-08-31 04:21:53,611 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 290 flow [2023-08-31 04:21:53,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 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) [2023-08-31 04:21:53,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:53,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:53,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:53,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:53,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:53,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash -304123085, now seen corresponding path program 2 times [2023-08-31 04:21:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:53,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435650532] [2023-08-31 04:21:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:53,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:21:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460553708] [2023-08-31 04:21:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:21:53,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:53,839 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) [2023-08-31 04:21:53,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:21:54,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 04:21:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:21:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:21:54,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:21:54,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-31 04:21:54,135 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 04:21:54,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 04:21:54,167 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 13 treesize of output 15 [2023-08-31 04:21:54,261 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 51 treesize of output 44 [2023-08-31 04:21:54,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 53 [2023-08-31 04:21:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:54,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:21:54,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:54,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435650532] [2023-08-31 04:21:54,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:21:54,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460553708] [2023-08-31 04:21:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460553708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:21:54,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:21:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 04:21:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657422495] [2023-08-31 04:21:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:21:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 04:21:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 04:21:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-31 04:21:54,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 251 [2023-08-31 04:21:54,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 290 flow. Second operand has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 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) [2023-08-31 04:21:54,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:54,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 251 [2023-08-31 04:21:54,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:55,485 INFO L130 PetriNetUnfolder]: 1710/3167 cut-off events. [2023-08-31 04:21:55,485 INFO L131 PetriNetUnfolder]: For 3910/3941 co-relation queries the response was YES. [2023-08-31 04:21:55,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 3167 events. 1710/3167 cut-off events. For 3910/3941 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 17481 event pairs, 356 based on Foata normal form. 41/3182 useless extension candidates. Maximal degree in co-relation 9393. Up to 769 conditions per place. [2023-08-31 04:21:55,507 INFO L137 encePairwiseOnDemand]: 240/251 looper letters, 132 selfloop transitions, 44 changer transitions 3/184 dead transitions. [2023-08-31 04:21:55,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 184 transitions, 1174 flow [2023-08-31 04:21:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 04:21:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 04:21:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1478 transitions. [2023-08-31 04:21:55,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907038512616202 [2023-08-31 04:21:55,512 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1478 transitions. [2023-08-31 04:21:55,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1478 transitions. [2023-08-31 04:21:55,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:55,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1478 transitions. [2023-08-31 04:21:55,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.16666666666667) internal successors, (1478), 12 states have internal predecessors, (1478), 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) [2023-08-31 04:21:55,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 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) [2023-08-31 04:21:55,552 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 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) [2023-08-31 04:21:55,552 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 290 flow. Second operand 12 states and 1478 transitions. [2023-08-31 04:21:55,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 184 transitions, 1174 flow [2023-08-31 04:21:55,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 184 transitions, 1172 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 04:21:55,565 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 616 flow [2023-08-31 04:21:55,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=616, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2023-08-31 04:21:55,565 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 37 predicate places. [2023-08-31 04:21:55,566 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 616 flow [2023-08-31 04:21:55,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 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) [2023-08-31 04:21:55,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:55,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:55,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 04:21:55,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:55,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 04:21:55,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1084291500, now seen corresponding path program 1 times [2023-08-31 04:21:55,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282872346] [2023-08-31 04:21:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:55,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:21:55,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954415097] [2023-08-31 04:21:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:55,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:55,790 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) [2023-08-31 04:21:55,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:21:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 04:21:55,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 04:21:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 04:21:56,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 04:21:56,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 04:21:56,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-31 04:21:56,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-31 04:21:56,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-31 04:21:56,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 04:21:56,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 04:21:56,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 04:21:56,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:56,261 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:56,266 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 04:21:56,266 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 04:21:56,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 04:21:56 BasicIcfg [2023-08-31 04:21:56,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 04:21:56,304 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 04:21:56,304 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 04:21:56,304 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 04:21:56,304 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:21:44" (3/4) ... [2023-08-31 04:21:56,306 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-31 04:21:56,368 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 04:21:56,369 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 04:21:56,369 INFO L158 Benchmark]: Toolchain (without parser) took 13076.93ms. Allocated memory was 79.7MB in the beginning and 172.0MB in the end (delta: 92.3MB). Free memory was 55.5MB in the beginning and 93.2MB in the end (delta: -37.7MB). Peak memory consumption was 56.5MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,369 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 54.5MB. Free memory is still 31.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 04:21:56,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 459.20ms. Allocated memory is still 79.7MB. Free memory was 55.3MB in the beginning and 55.0MB in the end (delta: 348.8kB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.40ms. Allocated memory is still 79.7MB. Free memory was 55.0MB in the beginning and 52.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,370 INFO L158 Benchmark]: Boogie Preprocessor took 62.74ms. Allocated memory is still 79.7MB. Free memory was 52.5MB in the beginning and 50.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,371 INFO L158 Benchmark]: RCFGBuilder took 549.70ms. Allocated memory is still 79.7MB. Free memory was 50.9MB in the beginning and 33.7MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,371 INFO L158 Benchmark]: TraceAbstraction took 11856.56ms. Allocated memory was 79.7MB in the beginning and 172.0MB in the end (delta: 92.3MB). Free memory was 57.3MB in the beginning and 100.5MB in the end (delta: -43.2MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,371 INFO L158 Benchmark]: Witness Printer took 64.95ms. Allocated memory is still 172.0MB. Free memory was 100.5MB in the beginning and 93.2MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-08-31 04:21:56,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 54.5MB. Free memory is still 31.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 459.20ms. Allocated memory is still 79.7MB. Free memory was 55.3MB in the beginning and 55.0MB in the end (delta: 348.8kB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.40ms. Allocated memory is still 79.7MB. Free memory was 55.0MB in the beginning and 52.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.74ms. Allocated memory is still 79.7MB. Free memory was 52.5MB in the beginning and 50.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 549.70ms. Allocated memory is still 79.7MB. Free memory was 50.9MB in the beginning and 33.7MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 11856.56ms. Allocated memory was 79.7MB in the beginning and 172.0MB in the end (delta: 92.3MB). Free memory was 57.3MB in the beginning and 100.5MB in the end (delta: -43.2MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. * Witness Printer took 64.95ms. Allocated memory is still 172.0MB. Free memory was 100.5MB in the beginning and 93.2MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 126 PlacesBefore, 35 PlacesAfterwards, 129 TransitionsBefore, 34 TransitionsAfterwards, 3840 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 4 ChoiceCompositions, 111 TotalNumberOfCompositions, 8363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4886, independent: 4600, independent conditional: 0, independent unconditional: 4600, dependent: 286, dependent conditional: 0, dependent unconditional: 286, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2137, independent: 2098, independent conditional: 0, independent unconditional: 2098, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4886, independent: 2502, independent conditional: 0, independent unconditional: 2502, dependent: 247, dependent conditional: 0, dependent unconditional: 247, unknown: 2137, unknown conditional: 0, unknown unconditional: 2137] , Statistics on independence cache: Total cache size (in pairs): 171, Positive cache size: 154, Positive conditional cache size: 0, Positive unconditional cache size: 154, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 199 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.6s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1022 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 824 mSDsluCounter, 313 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 279 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1882 IncrementalHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 34 mSDtfsCounter, 1882 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=616occurred in iteration=7, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 18 QuantifiedInterpolants, 1018 SizeOfPredicates, 24 NumberOfNonLiveVariables, 840 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-31 04:21:56,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE