./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.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/28_buggy_simple_loop1_vf.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 f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --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 16:32:14,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:32:14,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:32:14,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:32:14,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:32:14,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:32:14,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:32:14,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:32:14,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:32:14,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:32:14,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:32:14,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:32:14,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:32:14,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:32:14,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:32:14,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:32:14,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:32:14,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:32:14,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:32:14,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:32:14,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:32:14,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:32:14,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:32:14,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:32:14,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:32:14,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:32:14,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:32:14,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:32:14,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:32:14,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:32:14,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:32:14,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:32:14,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:32:14,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:32:14,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:32:14,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:32:14,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:32:14,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:32:14,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:32:14,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:32:14,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:32:14,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:32:14,832 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:32:14,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:32:14,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:32:14,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:32:14,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:32:14,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:32:14,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:32:14,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:32:14,835 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:32:14,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:32:14,836 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:32:14,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:32:14,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:32:14,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:32:14,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:32:14,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:32:14,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:32:14,837 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:32:14,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:32:14,838 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:32:14,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:32:14,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:32:14,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:32:14,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:32:14,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:32:14,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:32:14,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:32:14,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:32:14,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:32:14,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:32:14,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:32:14,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:32:14,840 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:32:14,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:32:14,840 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:32:14,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:32:15,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:32:15,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:32:15,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:32:15,102 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:32:15,103 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:32:15,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-30 16:32:16,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:32:16,290 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:32:16,291 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-30 16:32:16,300 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0441abd6f/88198a38de7b4a20a67a741b6af29494/FLAGab0e384fa [2023-08-30 16:32:16,309 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0441abd6f/88198a38de7b4a20a67a741b6af29494 [2023-08-30 16:32:16,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:32:16,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:32:16,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:32:16,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:32:16,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:32:16,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cee8c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16, skipping insertion in model container [2023-08-30 16:32:16,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:32:16,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:32:16,604 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/28_buggy_simple_loop1_vf.i[30287,30300] [2023-08-30 16:32:16,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:32:16,617 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:32:16,654 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/28_buggy_simple_loop1_vf.i[30287,30300] [2023-08-30 16:32:16,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:32:16,687 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:32:16,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16 WrapperNode [2023-08-30 16:32:16,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:32:16,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:32:16,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:32:16,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:32:16,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,729 INFO L138 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-08-30 16:32:16,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:32:16,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:32:16,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:32:16,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:32:16,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:32:16,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:32:16,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:32:16,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:32:16,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (1/1) ... [2023-08-30 16:32:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:32:16,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:32:16,789 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 16:32:16,815 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 16:32:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:32:16,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:32:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:32:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:32:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:32:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:32:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:32:16,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:32:16,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:32:16,834 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 16:32:16,943 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:32:16,944 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:32:17,063 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:32:17,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:32:17,067 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 16:32:17,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:17 BoogieIcfgContainer [2023-08-30 16:32:17,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:32:17,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:32:17,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:32:17,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:32:17,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:32:16" (1/3) ... [2023-08-30 16:32:17,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544cbe8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:32:17, skipping insertion in model container [2023-08-30 16:32:17,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:16" (2/3) ... [2023-08-30 16:32:17,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544cbe8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:32:17, skipping insertion in model container [2023-08-30 16:32:17,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:17" (3/3) ... [2023-08-30 16:32:17,073 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-08-30 16:32:17,083 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:32:17,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:32:17,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:32:17,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:32:17,149 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:17,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 67 transitions, 139 flow [2023-08-30 16:32:17,206 INFO L130 PetriNetUnfolder]: 10/77 cut-off events. [2023-08-30 16:32:17,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:17,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 10/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-30 16:32:17,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 67 transitions, 139 flow [2023-08-30 16:32:17,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 67 transitions, 139 flow [2023-08-30 16:32:17,220 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:17,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 67 transitions, 139 flow [2023-08-30 16:32:17,227 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 67 transitions, 139 flow [2023-08-30 16:32:17,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 67 transitions, 139 flow [2023-08-30 16:32:17,241 INFO L130 PetriNetUnfolder]: 10/77 cut-off events. [2023-08-30 16:32:17,241 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:17,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 10/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-30 16:32:17,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 1118 [2023-08-30 16:32:18,448 INFO L134 LiptonReduction]: Checked pairs total: 902 [2023-08-30 16:32:18,448 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-30 16:32:18,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:18,461 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;@1e0e0176, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:18,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:32:18,465 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2023-08-30 16:32:18,465 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:18,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:18,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:32:18,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:18,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash 428611895, now seen corresponding path program 1 times [2023-08-30 16:32:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029509043] [2023-08-30 16:32:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:18,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:18,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:18,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:18,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:32:18,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:32:18,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:32:18,583 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:18,585 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN (1/2) [2023-08-30 16:32:18,587 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:32:18,587 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:32:18,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:32:18 BasicIcfg [2023-08-30 16:32:18,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:32:18,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:32:18,599 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:32:18,599 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:32:18,599 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:17" (3/4) ... [2023-08-30 16:32:18,600 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 16:32:18,620 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:32:18,621 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:32:18,621 INFO L158 Benchmark]: Toolchain (without parser) took 2309.50ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 71.4MB in the beginning and 61.2MB in the end (delta: 10.2MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,622 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:32:18,622 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.74ms. Allocated memory is still 94.4MB. Free memory was 71.1MB in the beginning and 52.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,622 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.19ms. Allocated memory is still 94.4MB. Free memory was 52.2MB in the beginning and 50.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,623 INFO L158 Benchmark]: Boogie Preprocessor took 35.86ms. Allocated memory is still 94.4MB. Free memory was 50.2MB in the beginning and 49.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,623 INFO L158 Benchmark]: RCFGBuilder took 301.67ms. Allocated memory is still 94.4MB. Free memory was 49.0MB in the beginning and 64.2MB in the end (delta: -15.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,623 INFO L158 Benchmark]: TraceAbstraction took 1528.47ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 63.5MB in the beginning and 63.3MB in the end (delta: 173.1kB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,624 INFO L158 Benchmark]: Witness Printer took 22.12ms. Allocated memory is still 115.3MB. Free memory was 63.3MB in the beginning and 61.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:32:18,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.74ms. Allocated memory is still 94.4MB. Free memory was 71.1MB in the beginning and 52.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.19ms. Allocated memory is still 94.4MB. Free memory was 52.2MB in the beginning and 50.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.86ms. Allocated memory is still 94.4MB. Free memory was 50.2MB in the beginning and 49.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 301.67ms. Allocated memory is still 94.4MB. Free memory was 49.0MB in the beginning and 64.2MB in the end (delta: -15.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1528.47ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 63.5MB in the beginning and 63.3MB in the end (delta: 173.1kB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Witness Printer took 22.12ms. Allocated memory is still 115.3MB. Free memory was 63.3MB in the beginning and 61.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 61 PlacesBefore, 15 PlacesAfterwards, 67 TransitionsBefore, 17 TransitionsAfterwards, 1118 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 4 ChoiceCompositions, 57 TotalNumberOfCompositions, 902 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 902, independent: 902, independent conditional: 0, independent unconditional: 902, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 550, independent: 550, independent conditional: 0, independent unconditional: 550, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 902, independent: 352, independent conditional: 0, independent unconditional: 352, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 550, unknown conditional: 0, unknown unconditional: 550] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 695]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [arg={0:0}, pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i