./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-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 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:04:16,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:04:16,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:04:16,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:04:16,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:04:16,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:04:16,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:04:16,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:04:16,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:04:16,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:04:16,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:04:16,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:04:16,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:04:16,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:04:16,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:04:16,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:04:16,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:04:16,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:04:16,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:04:16,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:04:16,344 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:04:16,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:04:16,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:04:16,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:04:16,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:04:16,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:04:16,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:04:16,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:04:16,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:04:16,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:04:16,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:04:16,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:04:16,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:04:16,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:04:16,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:04:16,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:04:16,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:04:16,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:04:16,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:04:16,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:04:16,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:04:16,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:04:16,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:04:16,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:04:16,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:04:16,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:04:16,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:04:16,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:04:16,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:04:16,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:04:16,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:04:16,375 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:04:16,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:04:16,376 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:04:16,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:04:16,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:04:16,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:04:16,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:04:16,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:04:16,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:04:16,377 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:04:16,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:04:16,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:04:16,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:04:16,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:04:16,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:04:16,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:04:16,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:16,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:04:16,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:04:16,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:04:16,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:04:16,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:04:16,388 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:04:16,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:04:16,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:04:16,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2022-07-19 21:04:16,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:04:16,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:04:16,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:04:16,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:04:16,629 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:04:16,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-07-19 21:04:16,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77999a15/6648c56df87e44988dbdfd0943acf531/FLAG0c71d7665 [2022-07-19 21:04:17,052 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:04:17,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-07-19 21:04:17,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77999a15/6648c56df87e44988dbdfd0943acf531/FLAG0c71d7665 [2022-07-19 21:04:17,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77999a15/6648c56df87e44988dbdfd0943acf531 [2022-07-19 21:04:17,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:04:17,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:04:17,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:17,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:04:17,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:04:17,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79860840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17, skipping insertion in model container [2022-07-19 21:04:17,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:04:17,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:04:17,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-07-19 21:04:17,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:17,416 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:04:17,460 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-07-19 21:04:17,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:17,490 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:04:17,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17 WrapperNode [2022-07-19 21:04:17,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:17,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:17,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:04:17,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:04:17,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,534 INFO L137 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2022-07-19 21:04:17,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:17,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:04:17,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:04:17,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:04:17,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:04:17,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:04:17,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:04:17,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:04:17,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (1/1) ... [2022-07-19 21:04:17,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:17,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:04:17,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:04:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:04:17,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:04:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:04:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:04:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:04:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:04:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:04:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:04:17,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:04:17,624 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:04:17,720 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:04:17,721 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:04:17,837 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:04:17,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:04:17,842 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:04:17,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:17 BoogieIcfgContainer [2022-07-19 21:04:17,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:04:17,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:04:17,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:04:17,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:04:17,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:04:17" (1/3) ... [2022-07-19 21:04:17,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a44cf16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:17, skipping insertion in model container [2022-07-19 21:04:17,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:17" (2/3) ... [2022-07-19 21:04:17,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a44cf16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:17, skipping insertion in model container [2022-07-19 21:04:17,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:17" (3/3) ... [2022-07-19 21:04:17,849 INFO L111 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2022-07-19 21:04:17,853 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:04:17,859 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:04:17,859 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:04:17,859 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:04:17,915 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:17,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 68 transitions, 141 flow [2022-07-19 21:04:17,988 INFO L129 PetriNetUnfolder]: 10/79 cut-off events. [2022-07-19 21:04:17,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:17,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 79 events. 10/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2022-07-19 21:04:17,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 68 transitions, 141 flow [2022-07-19 21:04:17,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 68 transitions, 141 flow [2022-07-19 21:04:18,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:18,015 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e4e3dec, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67d627b3 [2022-07-19 21:04:18,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:04:18,034 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-19 21:04:18,034 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:18,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:18,035 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:18,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:04:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1264854827, now seen corresponding path program 1 times [2022-07-19 21:04:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160708235] [2022-07-19 21:04:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:18,177 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:18,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:18,221 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:18,222 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:04:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:04:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:04:18,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:04:18,224 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:04:18,226 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:18,226 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:04:18,255 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:18,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 97 places, 109 transitions, 230 flow [2022-07-19 21:04:18,275 INFO L129 PetriNetUnfolder]: 19/133 cut-off events. [2022-07-19 21:04:18,276 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:04:18,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 19/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2022-07-19 21:04:18,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 109 transitions, 230 flow [2022-07-19 21:04:18,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 109 transitions, 230 flow [2022-07-19 21:04:18,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:18,283 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e4e3dec, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67d627b3 [2022-07-19 21:04:18,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:04:18,290 INFO L129 PetriNetUnfolder]: 5/74 cut-off events. [2022-07-19 21:04:18,291 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:04:18,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:18,291 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:18,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:04:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1579710884, now seen corresponding path program 1 times [2022-07-19 21:04:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538567520] [2022-07-19 21:04:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:18,325 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:18,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:18,341 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:18,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:04:18,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:04:18,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:04:18,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:04:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:04:18,342 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:04:18,342 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:18,342 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:04:18,392 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:18,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 150 transitions, 321 flow [2022-07-19 21:04:18,433 INFO L129 PetriNetUnfolder]: 28/187 cut-off events. [2022-07-19 21:04:18,434 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:04:18,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 187 events. 28/187 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 505 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-07-19 21:04:18,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 150 transitions, 321 flow [2022-07-19 21:04:18,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 150 transitions, 321 flow [2022-07-19 21:04:18,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:18,455 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e4e3dec, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67d627b3 [2022-07-19 21:04:18,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:04:18,469 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-07-19 21:04:18,469 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:04:18,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:18,470 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:18,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:04:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 984929655, now seen corresponding path program 1 times [2022-07-19 21:04:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884920956] [2022-07-19 21:04:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:18,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:18,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884920956] [2022-07-19 21:04:18,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884920956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:18,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:18,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:04:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508029955] [2022-07-19 21:04:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:04:18,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:04:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:04:18,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 150 [2022-07-19 21:04:18,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 150 transitions, 321 flow. Second operand has 2 states, 2 states have (on average 131.0) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:18,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:18,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 150 [2022-07-19 21:04:18,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:18,635 INFO L129 PetriNetUnfolder]: 12/144 cut-off events. [2022-07-19 21:04:18,635 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:04:18,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 144 events. 12/144 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 332 event pairs, 0 based on Foata normal form. 19/148 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2022-07-19 21:04:18,640 INFO L132 encePairwiseOnDemand]: 136/150 looper letters, 3 selfloop transitions, 0 changer transitions 0/128 dead transitions. [2022-07-19 21:04:18,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 283 flow [2022-07-19 21:04:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:04:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:04:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 277 transitions. [2022-07-19 21:04:18,656 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9233333333333333 [2022-07-19 21:04:18,656 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 277 transitions. [2022-07-19 21:04:18,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 277 transitions. [2022-07-19 21:04:18,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:18,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 277 transitions. [2022-07-19 21:04:18,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 138.5) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:18,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:18,672 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:18,673 INFO L186 Difference]: Start difference. First operand has 132 places, 150 transitions, 321 flow. Second operand 2 states and 277 transitions. [2022-07-19 21:04:18,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 283 flow [2022-07-19 21:04:18,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 277 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:04:18,681 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 271 flow [2022-07-19 21:04:18,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=271, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-07-19 21:04:18,687 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, -8 predicate places. [2022-07-19 21:04:18,687 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 271 flow [2022-07-19 21:04:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.0) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:18,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:18,689 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:04:18,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:04:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash 984930616, now seen corresponding path program 1 times [2022-07-19 21:04:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35346982] [2022-07-19 21:04:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:18,756 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:18,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:18,793 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:18,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-07-19 21:04:18,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:04:18,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-19 21:04:18,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:04:18,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:04:18,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:04:18,794 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:04:18,798 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2022-07-19 21:04:18,798 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:04:18,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:04:18 BasicIcfg [2022-07-19 21:04:18,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:04:18,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:04:18,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:04:18,846 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:04:18,847 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:17" (3/4) ... [2022-07-19 21:04:18,848 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 21:04:18,901 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:04:18,901 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:04:18,902 INFO L158 Benchmark]: Toolchain (without parser) took 1828.74ms. Allocated memory was 83.9MB in the beginning and 130.0MB in the end (delta: 46.1MB). Free memory was 44.1MB in the beginning and 100.3MB in the end (delta: -56.2MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,902 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:04:18,902 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.43ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 43.9MB in the beginning and 79.6MB in the end (delta: -35.6MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,902 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.56ms. Allocated memory is still 107.0MB. Free memory was 79.6MB in the beginning and 77.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,903 INFO L158 Benchmark]: Boogie Preprocessor took 36.83ms. Allocated memory is still 107.0MB. Free memory was 77.5MB in the beginning and 76.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,903 INFO L158 Benchmark]: RCFGBuilder took 271.32ms. Allocated memory is still 107.0MB. Free memory was 76.4MB in the beginning and 64.7MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,903 INFO L158 Benchmark]: TraceAbstraction took 1000.36ms. Allocated memory is still 107.0MB. Free memory was 64.4MB in the beginning and 43.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,904 INFO L158 Benchmark]: Witness Printer took 55.02ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 43.4MB in the beginning and 100.3MB in the end (delta: -56.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-19 21:04:18,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 417.43ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 43.9MB in the beginning and 79.6MB in the end (delta: -35.6MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.56ms. Allocated memory is still 107.0MB. Free memory was 79.6MB in the beginning and 77.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.83ms. Allocated memory is still 107.0MB. Free memory was 77.5MB in the beginning and 76.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 271.32ms. Allocated memory is still 107.0MB. Free memory was 76.4MB in the beginning and 64.7MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1000.36ms. Allocated memory is still 107.0MB. Free memory was 64.4MB in the beginning and 43.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Witness Printer took 55.02ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 43.4MB in the beginning and 100.3MB in the end (delta: -56.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 VAL [t={3:0}] [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(); VAL [__VERIFIER_nondet_uint()=4294967296, arg={0:0}, arg={0:0}, x=4294967296] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=-4294967294, arg={0:0}, arg={0:0}, x=4294967296, y=-4294967294] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=4294967298, arg={0:0}, arg={0:0}, x=4294967296, y=-4294967294, z=4294967298] [L687] 1 int i, j=1, k=1; VAL [arg={0:0}, arg={0:0}, j=1, k=1, x=4294967296, y=-4294967294, z=4294967298] [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1, x=4294967296, y=-4294967294, z=4294967298] [L688] COND FALSE 1 !(i