./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.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 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:29:18,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:29:18,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:29:18,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:29:18,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:29:18,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:29:18,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:29:18,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:29:18,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:29:18,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:29:18,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:29:18,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:29:18,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:29:18,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:29:18,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:29:18,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:29:18,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:29:18,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:29:18,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:29:18,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:29:18,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:29:18,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:29:18,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:29:18,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:29:18,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:29:18,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:29:18,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:29:18,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:29:18,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:29:18,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:29:18,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:29:18,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:29:18,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:29:18,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:29:18,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:29:18,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:29:18,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:29:18,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:29:18,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:29:18,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:29:18,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:29:19,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:29:19,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:29:19,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:29:19,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:29:19,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:29:19,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:29:19,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:29:19,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:29:19,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:29:19,038 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:29:19,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:29:19,039 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:29:19,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:29:19,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:29:19,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:29:19,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:29:19,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:29:19,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:29:19,040 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:29:19,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:29:19,041 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:29:19,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:29:19,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:29:19,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:29:19,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:29:19,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:29:19,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:29:19,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:29:19,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:29:19,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:29:19,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:29:19,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:29:19,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:29:19,044 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:29:19,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:29:19,044 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:29:19,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:29:19,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:29:19,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:29:19,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:29:19,406 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:29:19,407 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:29:19,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-30 16:29:20,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:29:20,882 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:29:20,883 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-30 16:29:20,893 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560b32f38/0b246c9852de470d9e4c07bbbecfd4ce/FLAG9a8a6b453 [2023-08-30 16:29:20,907 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560b32f38/0b246c9852de470d9e4c07bbbecfd4ce [2023-08-30 16:29:20,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:29:20,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:29:20,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:29:20,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:29:20,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:29:20,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:29:20" (1/1) ... [2023-08-30 16:29:20,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eafba4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:20, skipping insertion in model container [2023-08-30 16:29:20,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:29:20" (1/1) ... [2023-08-30 16:29:20,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:29:20,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:29:21,277 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2023-08-30 16:29:21,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:29:21,302 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:29:21,352 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2023-08-30 16:29:21,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:29:21,400 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:29:21,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21 WrapperNode [2023-08-30 16:29:21,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:29:21,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:29:21,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:29:21,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:29:21,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,459 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-08-30 16:29:21,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:29:21,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:29:21,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:29:21,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:29:21,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,498 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:29:21,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:29:21,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:29:21,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:29:21,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (1/1) ... [2023-08-30 16:29:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:29:21,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:29:21,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 16:29:21,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 16:29:21,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:29:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:29:21,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:29:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:29:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:29:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:29:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:29:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:29:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:29:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:29:21,595 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:29:21,714 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:29:21,720 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:29:22,082 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:29:22,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:29:22,265 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 16:29:22,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:22 BoogieIcfgContainer [2023-08-30 16:29:22,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:29:22,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:29:22,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:29:22,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:29:22,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:29:20" (1/3) ... [2023-08-30 16:29:22,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663caac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:29:22, skipping insertion in model container [2023-08-30 16:29:22,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:21" (2/3) ... [2023-08-30 16:29:22,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663caac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:29:22, skipping insertion in model container [2023-08-30 16:29:22,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:22" (3/3) ... [2023-08-30 16:29:22,275 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-08-30 16:29:22,282 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:29:22,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:29:22,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:29:22,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:29:22,364 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:29:22,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:22,438 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:29:22,438 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:22,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:29:22,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:22,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:22,450 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:29:22,458 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:22,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:22,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:22,484 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:29:22,488 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:22,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:29:22,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 16:29:26,162 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-08-30 16:29:26,163 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 16:29:26,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:29:26,180 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;@39aae03b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:29:26,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:29:26,185 INFO L130 PetriNetUnfolder]: 5/25 cut-off events. [2023-08-30 16:29:26,185 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:26,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:26,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:26,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:26,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:26,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1286972708, now seen corresponding path program 1 times [2023-08-30 16:29:26,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:26,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357604936] [2023-08-30 16:29:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:26,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:26,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357604936] [2023-08-30 16:29:26,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357604936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:26,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:26,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:29:26,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962728680] [2023-08-30 16:29:26,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:26,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:29:26,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:29:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:29:26,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 218 [2023-08-30 16:29:26,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:26,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 218 [2023-08-30 16:29:26,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:26,527 INFO L130 PetriNetUnfolder]: 42/93 cut-off events. [2023-08-30 16:29:26,527 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:26,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 93 events. 42/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 2 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 178. Up to 83 conditions per place. [2023-08-30 16:29:26,529 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 22 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-30 16:29:26,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 107 flow [2023-08-30 16:29:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:29:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:29:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-30 16:29:26,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908256880733945 [2023-08-30 16:29:26,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-30 16:29:26,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-30 16:29:26,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:26,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-30 16:29:26,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,567 INFO L175 Difference]: Start difference. First operand has 24 places, 28 transitions, 61 flow. Second operand 3 states and 321 transitions. [2023-08-30 16:29:26,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 107 flow [2023-08-30 16:29:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:29:26,571 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 55 flow [2023-08-30 16:29:26,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-30 16:29:26,576 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-30 16:29:26,576 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 55 flow [2023-08-30 16:29:26,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:26,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:29:26,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:26,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash -342307077, now seen corresponding path program 1 times [2023-08-30 16:29:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:26,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138866371] [2023-08-30 16:29:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:26,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:26,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138866371] [2023-08-30 16:29:26,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138866371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:26,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:26,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:29:26,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906114793] [2023-08-30 16:29:26,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:26,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:29:26,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:26,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:29:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:29:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 218 [2023-08-30 16:29:26,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:26,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 218 [2023-08-30 16:29:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:26,797 INFO L130 PetriNetUnfolder]: 50/113 cut-off events. [2023-08-30 16:29:26,797 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:26,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 113 events. 50/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 14 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 221. Up to 73 conditions per place. [2023-08-30 16:29:26,799 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 26 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-30 16:29:26,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 127 flow [2023-08-30 16:29:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:29:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:29:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-08-30 16:29:26,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48623853211009177 [2023-08-30 16:29:26,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-08-30 16:29:26,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-08-30 16:29:26,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:26,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-08-30 16:29:26,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,806 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 55 flow. Second operand 3 states and 318 transitions. [2023-08-30 16:29:26,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 127 flow [2023-08-30 16:29:26,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:29:26,808 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 63 flow [2023-08-30 16:29:26,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-08-30 16:29:26,809 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-30 16:29:26,809 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 63 flow [2023-08-30 16:29:26,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:26,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:26,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:29:26,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:26,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash -339227072, now seen corresponding path program 1 times [2023-08-30 16:29:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226625468] [2023-08-30 16:29:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:26,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226625468] [2023-08-30 16:29:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226625468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:26,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:26,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:29:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711361158] [2023-08-30 16:29:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:26,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:29:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:29:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:29:26,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 218 [2023-08-30 16:29:26,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:26,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:26,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 218 [2023-08-30 16:29:26,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:27,097 INFO L130 PetriNetUnfolder]: 71/161 cut-off events. [2023-08-30 16:29:27,097 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:27,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 161 events. 71/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 12 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 326. Up to 73 conditions per place. [2023-08-30 16:29:27,098 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 39 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2023-08-30 16:29:27,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 197 flow [2023-08-30 16:29:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:29:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:29:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2023-08-30 16:29:27,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434250764525994 [2023-08-30 16:29:27,102 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2023-08-30 16:29:27,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2023-08-30 16:29:27,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:27,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2023-08-30 16:29:27,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:27,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:27,108 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:27,108 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 63 flow. Second operand 6 states and 580 transitions. [2023-08-30 16:29:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 197 flow [2023-08-30 16:29:27,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:29:27,110 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-08-30 16:29:27,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 16:29:27,111 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2023-08-30 16:29:27,111 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-08-30 16:29:27,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:27,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:27,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:29:27,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:27,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 85896053, now seen corresponding path program 1 times [2023-08-30 16:29:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:27,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496928657] [2023-08-30 16:29:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:29:27,180 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:29:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:29:27,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:29:27,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:29:27,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:29:27,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:29:27,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:29:27,237 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 16:29:27,238 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN (1/2) [2023-08-30 16:29:27,242 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:29:27,242 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:29:27,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:29:27 BasicIcfg [2023-08-30 16:29:27,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:29:27,290 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:29:27,290 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:29:27,290 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:29:27,290 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:22" (3/4) ... [2023-08-30 16:29:27,292 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 16:29:27,340 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:29:27,340 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:29:27,341 INFO L158 Benchmark]: Toolchain (without parser) took 6430.27ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 56.1MB in the beginning and 57.7MB in the end (delta: -1.6MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,341 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory is still 40.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:29:27,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 489.56ms. Allocated memory is still 79.7MB. Free memory was 56.1MB in the beginning and 55.8MB in the end (delta: 258.4kB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,342 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.31ms. Allocated memory is still 79.7MB. Free memory was 55.8MB in the beginning and 53.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,342 INFO L158 Benchmark]: Boogie Preprocessor took 41.01ms. Allocated memory is still 79.7MB. Free memory was 53.4MB in the beginning and 51.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,342 INFO L158 Benchmark]: RCFGBuilder took 764.21ms. Allocated memory is still 79.7MB. Free memory was 51.3MB in the beginning and 39.5MB in the end (delta: 11.8MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,343 INFO L158 Benchmark]: TraceAbstraction took 5020.26ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 39.1MB in the beginning and 66.1MB in the end (delta: -27.0MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,343 INFO L158 Benchmark]: Witness Printer took 50.89ms. Allocated memory is still 96.5MB. Free memory was 66.1MB in the beginning and 57.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 16:29:27,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory is still 40.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 489.56ms. Allocated memory is still 79.7MB. Free memory was 56.1MB in the beginning and 55.8MB in the end (delta: 258.4kB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.31ms. Allocated memory is still 79.7MB. Free memory was 55.8MB in the beginning and 53.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.01ms. Allocated memory is still 79.7MB. Free memory was 53.4MB in the beginning and 51.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 764.21ms. Allocated memory is still 79.7MB. Free memory was 51.3MB in the beginning and 39.5MB in the end (delta: 11.8MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. * TraceAbstraction took 5020.26ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 39.1MB in the beginning and 66.1MB in the end (delta: -27.0MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. * Witness Printer took 50.89ms. Allocated memory is still 96.5MB. Free memory was 66.1MB in the beginning and 57.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 107 PlacesBefore, 24 PlacesAfterwards, 114 TransitionsBefore, 28 TransitionsAfterwards, 2028 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 3 ChoiceCompositions, 104 TotalNumberOfCompositions, 2167 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1862, independent: 1748, independent conditional: 0, independent unconditional: 1748, dependent: 114, dependent conditional: 0, dependent unconditional: 114, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1107, independent: 1072, independent conditional: 0, independent unconditional: 1072, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1862, independent: 676, independent conditional: 0, independent unconditional: 676, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 1107, unknown conditional: 0, unknown unconditional: 1107] , Statistics on independence cache: Total cache size (in pairs): 60, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 759]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L714] 0 int memory[(2*960+1)]; [L715] 0 int next_alloc_idx = 1; [L716] 0 int m = 0; [L717] 0 int top; [L769] 0 int m2 = 0; [L770] 0 int state = 0; [L788] 0 pthread_t t; VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, t={6:0}, top={4:0}] [L789] COND TRUE 0 1 [L789] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, pthread_create(&t, 0, thr1, 0)=0, state=0, t={6:0}, top={4:0}] [L773] CALL 1 __VERIFIER_atomic_acquire(&m2) [L691] EXPR 1 \read(*m) [L691] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L691] RET 1 assume_abort_if_not(*m==0) [L692] 1 *m = 1 [L773] RET 1 __VERIFIER_atomic_acquire(&m2) [L776] 1 case 0: [L777] CALL 1 EBStack_init() [L732] 1 top = 0 [L777] RET 1 EBStack_init() [L778] 1 state = 1 [L779] 1 case 1: [L780] CALL 1 __VERIFIER_atomic_release(&m2) [L696] EXPR 1 \read(*m) [L696] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L696] RET 1 assume_abort_if_not(*m==1) [L697] 1 *m = 0 [L780] RET 1 __VERIFIER_atomic_release(&m2) [L781] CALL 1 push_loop() [L762] 1 int r = -1; [L763] 1 int arg = __VERIFIER_nondet_int(); [L764] COND TRUE 1 1 [L765] CALL, EXPR 1 push(arg) [L741] 1 int oldTop = -1, newTop = -1, casret = -1; [L742] CALL, EXPR 1 index_malloc() [L719] 1 int curr_alloc_idx = -1; VAL [curr_alloc_idx=-1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L720] CALL 1 __VERIFIER_atomic_acquire(&m) [L691] EXPR 1 \read(*m) [L691] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L691] RET 1 assume_abort_if_not(*m==0) [L692] 1 *m = 1 [L720] RET 1 __VERIFIER_atomic_acquire(&m) [L721] COND FALSE 1 !(next_alloc_idx+2-1 > (2*960+1)) [L725] 1 curr_alloc_idx = next_alloc_idx VAL [curr_alloc_idx=1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L726] 1 next_alloc_idx += 2 [L727] CALL 1 __VERIFIER_atomic_release(&m) [L696] EXPR 1 \read(*m) [L696] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L696] RET 1 assume_abort_if_not(*m==1) [L697] 1 *m = 0 [L727] RET 1 __VERIFIER_atomic_release(&m) [L729] 1 return curr_alloc_idx; [L742] RET, EXPR 1 index_malloc() [L742] 1 newTop = index_malloc() [L743] COND FALSE 1 !(newTop == 0) [L746] 1 memory[newTop+0] = d VAL [\old(d)=7, casret={9:0}, d=7, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L747] COND TRUE 1 1 [L748] EXPR 1 \read(top) [L748] 1 oldTop = top [L749] 1 memory[newTop+1] = oldTop [L750] CALL 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L705] EXPR 1 \read(*v) [L705] COND TRUE 1 *v == e [L707] 1 *v = u [L707] 1 *r = 1 [L750] RET 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L751] EXPR 1 \read(casret) [L751] COND TRUE 1 casret==1 VAL [\old(d)=7, \read(casret)=1, casret={9:0}, d=7, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L752] 1 return 1; [L741] 1 int oldTop = -1, newTop = -1, casret = -1; [L752] 1 return 1; [L765] RET, EXPR 1 push(arg) [L765] 1 r = push(arg) VAL [arg=7, m2={5:0}, m={3:0}, next_alloc_idx=3, push(arg)=1, r=1, state=1, top={4:0}] [L766] CALL 1 __VERIFIER_atomic_assert(r) [L759] EXPR 1 !r || !isEmpty() [L759] CALL, EXPR 1 isEmpty() [L735] EXPR 1 \read(top) [L735] COND FALSE 1 !(top == 0) [L738] 1 return 0; [L759] RET, EXPR 1 isEmpty() [L759] EXPR 1 !r || !isEmpty() [L759] COND TRUE 1 !(!(!r || !isEmpty())) [L759] 1 reach_error() VAL [\old(r)=1, m2={5:0}, m={3:0}, next_alloc_idx=3, r=1, state=1, top={4:0}] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 175 locations, 3 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: 4.8s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 82 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 221 IncrementalHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 18 mSDtfsCounter, 221 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=3, InterpolantAutomatonStates: 12, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 76 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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! [2023-08-30 16:29:27,363 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