./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.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/goblint-regression/28-race_reach_87-lists_racefree.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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:20:29,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:20:29,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:20:29,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:20:29,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:20:29,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:20:29,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:20:29,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:20:29,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:20:29,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:20:29,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:20:29,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:20:29,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:20:29,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:20:29,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:20:29,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:20:29,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:20:29,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:20:29,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:20:29,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:20:29,842 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:20:29,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:20:29,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:20:29,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:20:29,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:20:29,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:20:29,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:20:29,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:20:29,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:20:29,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:20:29,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:20:29,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:20:29,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:20:29,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:20:29,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:20:29,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:20:29,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:20:29,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:20:29,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:20:29,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:20:29,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:20:29,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:20:29,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:20:29,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:20:29,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:20:29,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:20:29,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:20:29,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:20:29,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:20:29,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:20:29,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:20:29,887 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:20:29,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:20:29,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:20:29,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:20:29,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:20:29,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:20:29,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:20:29,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:20:29,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:20:29,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:20:29,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:20:29,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:20:29,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:20:29,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:20:29,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:20:29,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:20:29,892 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:20:29,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:20:29,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:20:29,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-07-19 21:20:30,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:20:30,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:20:30,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:20:30,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:20:30,115 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:20:30,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-07-19 21:20:30,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91154cc53/d6d976054a6f4e85ac15aa551807fa4a/FLAGb86f12cbb [2022-07-19 21:20:30,755 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:20:30,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-07-19 21:20:30,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91154cc53/d6d976054a6f4e85ac15aa551807fa4a/FLAGb86f12cbb [2022-07-19 21:20:30,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91154cc53/d6d976054a6f4e85ac15aa551807fa4a [2022-07-19 21:20:30,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:20:30,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:20:30,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:20:30,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:20:30,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:20:30,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:20:30" (1/1) ... [2022-07-19 21:20:30,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8532b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:30, skipping insertion in model container [2022-07-19 21:20:30,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:20:30" (1/1) ... [2022-07-19 21:20:30,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:20:31,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:20:31,510 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/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-07-19 21:20:31,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:20:31,621 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:20:31,642 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/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-07-19 21:20:31,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:20:31,697 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:20:31,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31 WrapperNode [2022-07-19 21:20:31,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:20:31,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:20:31,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:20:31,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:20:31,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,742 INFO L137 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 224 [2022-07-19 21:20:31,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:20:31,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:20:31,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:20:31,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:20:31,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:20:31,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:20:31,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:20:31,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:20:31,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (1/1) ... [2022-07-19 21:20:31,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:20:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:31,821 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 21:20:31,864 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 21:20:31,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:20:31,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:20:31,890 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-07-19 21:20:31,891 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-07-19 21:20:31,891 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:20:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:20:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:20:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:20:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:20:31,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:20:31,893 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 21:20:32,063 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:20:32,064 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:20:32,296 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:20:32,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:20:32,303 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-19 21:20:32,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:20:32 BoogieIcfgContainer [2022-07-19 21:20:32,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:20:32,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:20:32,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:20:32,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:20:32,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:20:30" (1/3) ... [2022-07-19 21:20:32,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ea9ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:20:32, skipping insertion in model container [2022-07-19 21:20:32,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:31" (2/3) ... [2022-07-19 21:20:32,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ea9ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:20:32, skipping insertion in model container [2022-07-19 21:20:32,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:20:32" (3/3) ... [2022-07-19 21:20:32,323 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-07-19 21:20:32,328 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:20:32,334 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:20:32,334 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:20:32,335 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:20:32,432 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:20:32,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 498 flow [2022-07-19 21:20:32,610 INFO L129 PetriNetUnfolder]: 54/440 cut-off events. [2022-07-19 21:20:32,611 INFO L130 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-07-19 21:20:32,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 440 events. 54/440 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1762 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2022-07-19 21:20:32,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 498 flow [2022-07-19 21:20:32,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 236 transitions, 488 flow [2022-07-19 21:20:32,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:32,641 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@8274c12, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52cad118 [2022-07-19 21:20:32,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:20:32,651 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2022-07-19 21:20:32,652 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:32,652 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:32,653 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, 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 21:20:32,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1997877220, now seen corresponding path program 1 times [2022-07-19 21:20:32,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:32,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651837205] [2022-07-19 21:20:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:32,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:32,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651837205] [2022-07-19 21:20:32,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651837205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:32,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:32,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888546401] [2022-07-19 21:20:32,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:32,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 238 [2022-07-19 21:20:32,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 236 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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 21:20:32,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:32,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 238 [2022-07-19 21:20:32,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:33,011 INFO L129 PetriNetUnfolder]: 11/402 cut-off events. [2022-07-19 21:20:33,011 INFO L130 PetriNetUnfolder]: For 18/27 co-relation queries the response was YES. [2022-07-19 21:20:33,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 402 events. 11/402 cut-off events. For 18/27 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1466 event pairs, 0 based on Foata normal form. 54/431 useless extension candidates. Maximal degree in co-relation 222. Up to 16 conditions per place. [2022-07-19 21:20:33,014 INFO L132 encePairwiseOnDemand]: 218/238 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-07-19 21:20:33,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 223 transitions, 496 flow [2022-07-19 21:20:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-07-19 21:20:33,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9159663865546218 [2022-07-19 21:20:33,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-07-19 21:20:33,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-07-19 21:20:33,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:33,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-07-19 21:20:33,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 21:20:33,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 21:20:33,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 21:20:33,043 INFO L186 Difference]: Start difference. First operand has 218 places, 236 transitions, 488 flow. Second operand 3 states and 654 transitions. [2022-07-19 21:20:33,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 223 transitions, 496 flow [2022-07-19 21:20:33,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 223 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:33,049 INFO L242 Difference]: Finished difference. Result has 220 places, 219 transitions, 464 flow [2022-07-19 21:20:33,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=220, PETRI_TRANSITIONS=219} [2022-07-19 21:20:33,053 INFO L279 CegarLoopForPetriNet]: 218 programPoint places, 2 predicate places. [2022-07-19 21:20:33,053 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 219 transitions, 464 flow [2022-07-19 21:20:33,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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 21:20:33,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:33,054 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:20:33,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash -787589799, now seen corresponding path program 1 times [2022-07-19 21:20:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:33,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298324302] [2022-07-19 21:20:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298324302] [2022-07-19 21:20:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298324302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973881021] [2022-07-19 21:20:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:33,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:33,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:20:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973881021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:33,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:33,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971470782] [2022-07-19 21:20:33,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:33,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:33,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-07-19 21:20:33,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 219 transitions, 464 flow. Second operand has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 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 21:20:33,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:33,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-07-19 21:20:33,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:33,464 INFO L129 PetriNetUnfolder]: 11/420 cut-off events. [2022-07-19 21:20:33,464 INFO L130 PetriNetUnfolder]: For 19/28 co-relation queries the response was YES. [2022-07-19 21:20:33,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 420 events. 11/420 cut-off events. For 19/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1393 event pairs, 0 based on Foata normal form. 2/398 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2022-07-19 21:20:33,467 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 17 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-07-19 21:20:33,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 231 transitions, 542 flow [2022-07-19 21:20:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1873 transitions. [2022-07-19 21:20:33,471 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8744164332399627 [2022-07-19 21:20:33,471 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1873 transitions. [2022-07-19 21:20:33,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1873 transitions. [2022-07-19 21:20:33,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:33,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1873 transitions. [2022-07-19 21:20:33,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.11111111111111) internal successors, (1873), 9 states have internal predecessors, (1873), 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 21:20:33,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 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 21:20:33,481 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 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 21:20:33,481 INFO L186 Difference]: Start difference. First operand has 220 places, 219 transitions, 464 flow. Second operand 9 states and 1873 transitions. [2022-07-19 21:20:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 231 transitions, 542 flow [2022-07-19 21:20:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 231 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:33,489 INFO L242 Difference]: Finished difference. Result has 230 places, 225 transitions, 512 flow [2022-07-19 21:20:33,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=512, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2022-07-19 21:20:33,491 INFO L279 CegarLoopForPetriNet]: 218 programPoint places, 12 predicate places. [2022-07-19 21:20:33,491 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 512 flow [2022-07-19 21:20:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 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 21:20:33,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:33,492 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:33,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:20:33,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:33,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash -113700397, now seen corresponding path program 2 times [2022-07-19 21:20:33,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722975030] [2022-07-19 21:20:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722975030] [2022-07-19 21:20:33,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722975030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817414837] [2022-07-19 21:20:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:20:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:33,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:33,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:20:34,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:20:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:20:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:34,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:34,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817414837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:34,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:34,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:34,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726591332] [2022-07-19 21:20:34,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:34,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-07-19 21:20:34,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 512 flow. Second operand has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 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 21:20:34,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:34,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-07-19 21:20:34,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:34,499 INFO L129 PetriNetUnfolder]: 11/484 cut-off events. [2022-07-19 21:20:34,499 INFO L130 PetriNetUnfolder]: For 39/48 co-relation queries the response was YES. [2022-07-19 21:20:34,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 484 events. 11/484 cut-off events. For 39/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1396 event pairs, 0 based on Foata normal form. 4/464 useless extension candidates. Maximal degree in co-relation 390. Up to 12 conditions per place. [2022-07-19 21:20:34,503 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 29 selfloop transitions, 21 changer transitions 0/255 dead transitions. [2022-07-19 21:20:34,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 255 transitions, 732 flow [2022-07-19 21:20:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4359 transitions. [2022-07-19 21:20:34,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8721488595438175 [2022-07-19 21:20:34,511 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4359 transitions. [2022-07-19 21:20:34,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4359 transitions. [2022-07-19 21:20:34,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:34,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4359 transitions. [2022-07-19 21:20:34,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 207.57142857142858) internal successors, (4359), 21 states have internal predecessors, (4359), 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 21:20:34,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 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 21:20:34,530 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 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 21:20:34,530 INFO L186 Difference]: Start difference. First operand has 230 places, 225 transitions, 512 flow. Second operand 21 states and 4359 transitions. [2022-07-19 21:20:34,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 255 transitions, 732 flow [2022-07-19 21:20:34,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 255 transitions, 718 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:34,554 INFO L242 Difference]: Finished difference. Result has 254 places, 238 transitions, 636 flow [2022-07-19 21:20:34,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=636, PETRI_PLACES=254, PETRI_TRANSITIONS=238} [2022-07-19 21:20:34,556 INFO L279 CegarLoopForPetriNet]: 218 programPoint places, 36 predicate places. [2022-07-19 21:20:34,557 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 238 transitions, 636 flow [2022-07-19 21:20:34,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 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 21:20:34,558 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:34,558 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:34,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:20:34,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 21:20:34,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:20:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash -506637625, now seen corresponding path program 3 times [2022-07-19 21:20:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357994975] [2022-07-19 21:20:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:20:34,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:34,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357994975] [2022-07-19 21:20:34,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357994975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:34,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162834807] [2022-07-19 21:20:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:20:34,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:35,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:35,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process