./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 791161d1 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-?-791161d [2022-07-22 21:19:15,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:19:15,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:19:15,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:19:15,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:19:15,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:19:15,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:19:15,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:19:15,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:19:15,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:19:15,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:19:15,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:19:15,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:19:15,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:19:15,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:19:15,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:19:15,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:19:15,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:19:15,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:19:15,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:19:15,747 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:19:15,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:19:15,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:19:15,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:19:15,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:19:15,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:19:15,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:19:15,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:19:15,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:19:15,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:19:15,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:19:15,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:19:15,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:19:15,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:19:15,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:19:15,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:19:15,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:19:15,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:19:15,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:19:15,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:19:15,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:19:15,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:19:15,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:19:15,809 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:19:15,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:19:15,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:19:15,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:19:15,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:19:15,811 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:19:15,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:19:15,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:19:15,812 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:19:15,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:19:15,813 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:19:15,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:19:15,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:19:15,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:19:15,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:19:15,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:19:15,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:19:15,815 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:19:15,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:19:15,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:19:15,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:19:15,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:19:15,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:19:15,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:19:15,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:19:15,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:19:15,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:19:15,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:19:15,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:19:15,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:19:15,818 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:19:15,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:19:15,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:19:15,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2022-07-22 21:19:16,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:19:16,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:19:16,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:19:16,087 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:19:16,088 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:19:16,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-07-22 21:19:16,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f91e478/d22be67a583d406fac77d75e8f1b010e/FLAGe4a679eb8 [2022-07-22 21:19:16,576 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:19:16,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-07-22 21:19:16,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f91e478/d22be67a583d406fac77d75e8f1b010e/FLAGe4a679eb8 [2022-07-22 21:19:16,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f91e478/d22be67a583d406fac77d75e8f1b010e [2022-07-22 21:19:16,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:19:16,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:19:16,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:19:16,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:19:16,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:19:16,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:19:16" (1/1) ... [2022-07-22 21:19:16,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0142a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:16, skipping insertion in model container [2022-07-22 21:19:16,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:19:16" (1/1) ... [2022-07-22 21:19:16,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:19:16,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:19:17,251 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] [2022-07-22 21:19:17,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:19:17,268 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:19:17,336 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] [2022-07-22 21:19:17,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:19:17,368 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:19:17,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17 WrapperNode [2022-07-22 21:19:17,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:19:17,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:19:17,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:19:17,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:19:17,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,413 INFO L137 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2022-07-22 21:19:17,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:19:17,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:19:17,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:19:17,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:19:17,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:19:17,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:19:17,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:19:17,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:19:17,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (1/1) ... [2022-07-22 21:19:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:19:17,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:19:17,467 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) [2022-07-22 21:19:17,475 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 [2022-07-22 21:19:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:19:17,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:19:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:19:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:19:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:19:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:19:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:19:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:19:17,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:19:17,504 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:19:17,580 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:19:17,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:19:17,709 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:19:17,715 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:19:17,716 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:19:17,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:17 BoogieIcfgContainer [2022-07-22 21:19:17,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:19:17,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:19:17,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:19:17,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:19:17,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:19:16" (1/3) ... [2022-07-22 21:19:17,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623b73d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:19:17, skipping insertion in model container [2022-07-22 21:19:17,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:17" (2/3) ... [2022-07-22 21:19:17,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623b73d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:19:17, skipping insertion in model container [2022-07-22 21:19:17,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:17" (3/3) ... [2022-07-22 21:19:17,725 INFO L111 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2022-07-22 21:19:17,730 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:19:17,739 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:19:17,739 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:19:17,739 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:19:17,897 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:17,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 68 transitions, 141 flow [2022-07-22 21:19:17,989 INFO L129 PetriNetUnfolder]: 10/79 cut-off events. [2022-07-22 21:19:17,990 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:19:17,994 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. [2022-07-22 21:19:17,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 68 transitions, 141 flow [2022-07-22 21:19:18,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 68 transitions, 141 flow [2022-07-22 21:19:18,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:18,027 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@558d70a3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77399cf8 [2022-07-22 21:19:18,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:19:18,042 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-22 21:19:18,043 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:19:18,043 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,044 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] [2022-07-22 21:19:18,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:19:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1264854827, now seen corresponding path program 1 times [2022-07-22 21:19:18,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555453140] [2022-07-22 21:19:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,201 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:18,267 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:18,268 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:19:18,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:19:18,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:19:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:19:18,272 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:19:18,276 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:18,276 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:19:18,334 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:18,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 97 places, 109 transitions, 230 flow [2022-07-22 21:19:18,382 INFO L129 PetriNetUnfolder]: 19/133 cut-off events. [2022-07-22 21:19:18,383 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:19:18,386 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. [2022-07-22 21:19:18,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 109 transitions, 230 flow [2022-07-22 21:19:18,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 109 transitions, 230 flow [2022-07-22 21:19:18,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:18,397 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@558d70a3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77399cf8 [2022-07-22 21:19:18,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:19:18,413 INFO L129 PetriNetUnfolder]: 5/74 cut-off events. [2022-07-22 21:19:18,418 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:19:18,419 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,419 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] [2022-07-22 21:19:18,419 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)] === [2022-07-22 21:19:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1579710884, now seen corresponding path program 1 times [2022-07-22 21:19:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686342511] [2022-07-22 21:19:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,472 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:18,505 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:18,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:19:18,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:19:18,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:19:18,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:19:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:19:18,508 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:19:18,509 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:18,509 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:19:18,566 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:18,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 150 transitions, 321 flow [2022-07-22 21:19:18,617 INFO L129 PetriNetUnfolder]: 28/187 cut-off events. [2022-07-22 21:19:18,618 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:19:18,623 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. [2022-07-22 21:19:18,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 150 transitions, 321 flow [2022-07-22 21:19:18,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 150 transitions, 321 flow [2022-07-22 21:19:18,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:18,633 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@558d70a3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77399cf8 [2022-07-22 21:19:18,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:19:18,665 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-07-22 21:19:18,665 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:19:18,666 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,666 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] [2022-07-22 21:19:18,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:19:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,667 INFO L85 PathProgramCache]: Analyzing trace with hash 984929655, now seen corresponding path program 1 times [2022-07-22 21:19:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983130599] [2022-07-22 21:19:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:19:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983130599] [2022-07-22 21:19:18,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983130599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:18,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:18,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477940790] [2022-07-22 21:19:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:18,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:18,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:18,802 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 150 [2022-07-22 21:19:18,805 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) [2022-07-22 21:19:18,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:18,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 150 [2022-07-22 21:19:18,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:18,840 INFO L129 PetriNetUnfolder]: 12/144 cut-off events. [2022-07-22 21:19:18,840 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-22 21:19:18,842 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. [2022-07-22 21:19:18,844 INFO L132 encePairwiseOnDemand]: 136/150 looper letters, 3 selfloop transitions, 0 changer transitions 0/128 dead transitions. [2022-07-22 21:19:18,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 283 flow [2022-07-22 21:19:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 277 transitions. [2022-07-22 21:19:18,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9233333333333333 [2022-07-22 21:19:18,859 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 277 transitions. [2022-07-22 21:19:18,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 277 transitions. [2022-07-22 21:19:18,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:18,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 277 transitions. [2022-07-22 21:19:18,867 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) [2022-07-22 21:19:18,872 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) [2022-07-22 21:19:18,873 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) [2022-07-22 21:19:18,875 INFO L186 Difference]: Start difference. First operand has 132 places, 150 transitions, 321 flow. Second operand 2 states and 277 transitions. [2022-07-22 21:19:18,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 283 flow [2022-07-22 21:19:18,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 277 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:18,883 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 271 flow [2022-07-22 21:19:18,886 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} [2022-07-22 21:19:18,891 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, -8 predicate places. [2022-07-22 21:19:18,892 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 271 flow [2022-07-22 21:19:18,893 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) [2022-07-22 21:19:18,893 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,893 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] [2022-07-22 21:19:18,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:19:18,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:19:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash 984930616, now seen corresponding path program 1 times [2022-07-22 21:19:18,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587960989] [2022-07-22 21:19:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,954 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,990 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:18,992 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:18,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-07-22 21:19:18,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:19:18,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-22 21:19:18,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:19:18,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:19:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:19:18,993 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:19:18,998 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2022-07-22 21:19:18,998 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:19:19,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:19:19 BasicIcfg [2022-07-22 21:19:19,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:19:19,055 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:19:19,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:19:19,055 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:19:19,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:17" (3/4) ... [2022-07-22 21:19:19,057 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 21:19:19,104 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 21:19:19,104 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:19:19,106 INFO L158 Benchmark]: Toolchain (without parser) took 2157.48ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 69.9MB in the beginning and 53.0MB in the end (delta: 16.9MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2022-07-22 21:19:19,106 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:19:19,106 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.55ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 63.1MB in the end (delta: 6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 21:19:19,106 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.54ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 61.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:19:19,106 INFO L158 Benchmark]: Boogie Preprocessor took 20.48ms. Allocated memory is still 98.6MB. Free memory was 61.2MB in the beginning and 59.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:19:19,107 INFO L158 Benchmark]: RCFGBuilder took 282.42ms. Allocated memory is still 98.6MB. Free memory was 59.8MB in the beginning and 48.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-22 21:19:19,107 INFO L158 Benchmark]: TraceAbstraction took 1335.32ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 47.9MB in the beginning and 59.7MB in the end (delta: -11.7MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2022-07-22 21:19:19,107 INFO L158 Benchmark]: Witness Printer took 48.94ms. Allocated memory is still 119.5MB. Free memory was 59.7MB in the beginning and 53.0MB in the end (delta: 6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 21:19:19,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.55ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 63.1MB in the end (delta: 6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.54ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 61.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.48ms. Allocated memory is still 98.6MB. Free memory was 61.2MB in the beginning and 59.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.42ms. Allocated memory is still 98.6MB. Free memory was 59.8MB in the beginning and 48.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1335.32ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 47.9MB in the beginning and 59.7MB in the end (delta: -11.7MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Witness Printer took 48.94ms. Allocated memory is still 119.5MB. Free memory was 59.7MB in the beginning and 53.0MB in the end (delta: 6.7MB). Peak memory consumption was 6.3MB. 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