./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 21:10:34,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:10:34,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:10:34,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:10:34,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:10:34,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:10:34,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:10:34,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:10:34,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:10:34,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:10:34,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:10:34,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:10:34,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:10:34,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:10:34,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:10:34,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:10:34,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:10:34,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:10:34,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:10:34,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:10:34,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:10:34,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:10:34,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:10:34,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:10:34,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:10:34,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:10:34,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:10:34,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:10:34,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:10:34,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:10:34,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:10:34,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:10:34,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:10:34,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:10:34,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:10:34,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:10:34,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:10:34,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:10:34,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:10:34,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:10:34,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:10:34,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:10:34,697 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:10:34,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:10:34,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:10:34,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:10:34,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:10:34,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:10:34,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:10:34,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:10:34,700 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:10:34,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:10:34,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:10:34,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:10:34,702 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:10:34,702 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:10:34,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:10:34,702 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:10:34,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:10:34,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:10:34,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:10:34,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:10:34,704 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:10:34,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:10:34,704 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:10:34,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:10:34,704 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:10:34,704 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:10:34,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:10:34,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:10:34,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:10:34,980 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:10:34,980 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:10:34,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-08-31 21:10:35,906 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:10:36,118 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:10:36,118 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-08-31 21:10:36,130 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34bab37f9/09e66bd90f7a44e0993ed8494f05a73c/FLAG9c1166c1b [2023-08-31 21:10:36,139 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34bab37f9/09e66bd90f7a44e0993ed8494f05a73c [2023-08-31 21:10:36,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:10:36,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:10:36,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:10:36,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:10:36,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:10:36,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc6a1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36, skipping insertion in model container [2023-08-31 21:10:36,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:10:36,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:10:36,462 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2023-08-31 21:10:36,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:10:36,571 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:10:36,587 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2023-08-31 21:10:36,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:10:36,634 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:10:36,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36 WrapperNode [2023-08-31 21:10:36,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:10:36,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:10:36,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:10:36,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:10:36,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,675 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 341 [2023-08-31 21:10:36,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:10:36,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:10:36,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:10:36,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:10:36,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:10:36,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:10:36,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:10:36,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:10:36,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (1/1) ... [2023-08-31 21:10:36,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:10:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:10:36,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 21:10:36,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 21:10:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:10:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-31 21:10:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-31 21:10:36,764 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-31 21:10:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:10:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:10:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-31 21:10:36,773 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-31 21:10:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:10:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:10:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 21:10:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:10:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-31 21:10:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:10:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:10:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:10:36,776 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 21:10:36,956 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:10:36,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:10:37,364 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:10:37,369 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:10:37,369 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-31 21:10:37,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:10:37 BoogieIcfgContainer [2023-08-31 21:10:37,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:10:37,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:10:37,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:10:37,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:10:37,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:10:36" (1/3) ... [2023-08-31 21:10:37,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dfdced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:10:37, skipping insertion in model container [2023-08-31 21:10:37,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:10:36" (2/3) ... [2023-08-31 21:10:37,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dfdced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:10:37, skipping insertion in model container [2023-08-31 21:10:37,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:10:37" (3/3) ... [2023-08-31 21:10:37,376 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-08-31 21:10:37,381 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:10:37,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:10:37,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-31 21:10:37,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:10:37,490 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:10:37,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 360 transitions, 742 flow [2023-08-31 21:10:37,669 INFO L130 PetriNetUnfolder]: 54/645 cut-off events. [2023-08-31 21:10:37,670 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-08-31 21:10:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 645 events. 54/645 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3035 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 323. Up to 8 conditions per place. [2023-08-31 21:10:37,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 360 transitions, 742 flow [2023-08-31 21:10:37,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 355 transitions, 726 flow [2023-08-31 21:10:37,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:10:37,712 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 355 transitions, 726 flow [2023-08-31 21:10:37,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 355 transitions, 726 flow [2023-08-31 21:10:37,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 355 transitions, 726 flow [2023-08-31 21:10:37,791 INFO L130 PetriNetUnfolder]: 50/630 cut-off events. [2023-08-31 21:10:37,791 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-08-31 21:10:37,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 630 events. 50/630 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2729 event pairs, 0 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 311. Up to 8 conditions per place. [2023-08-31 21:10:37,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 44136 [2023-08-31 21:10:48,337 WARN L222 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-31 21:10:59,041 INFO L134 LiptonReduction]: Checked pairs total: 194434 [2023-08-31 21:10:59,042 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-31 21:10:59,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:10:59,053 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24669630, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:10:59,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 21:10:59,057 INFO L130 PetriNetUnfolder]: 1/30 cut-off events. [2023-08-31 21:10:59,057 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:10:59,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:10:59,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 21:10:59,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:10:59,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:10:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash -271726470, now seen corresponding path program 1 times [2023-08-31 21:10:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:10:59,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397826937] [2023-08-31 21:10:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:10:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:10:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:10:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:10:59,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:10:59,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397826937] [2023-08-31 21:10:59,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397826937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:10:59,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:10:59,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:10:59,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729896809] [2023-08-31 21:10:59,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:10:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:10:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:10:59,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:10:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:10:59,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 574 [2023-08-31 21:10:59,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 160 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:10:59,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:10:59,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 574 [2023-08-31 21:10:59,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:11:00,890 INFO L130 PetriNetUnfolder]: 6497/17264 cut-off events. [2023-08-31 21:11:00,890 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-31 21:11:00,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27400 conditions, 17264 events. 6497/17264 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 166283 event pairs, 6154 based on Foata normal form. 584/15957 useless extension candidates. Maximal degree in co-relation 25766. Up to 10034 conditions per place. [2023-08-31 21:11:00,926 INFO L137 encePairwiseOnDemand]: 560/574 looper letters, 48 selfloop transitions, 2 changer transitions 21/150 dead transitions. [2023-08-31 21:11:00,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 150 transitions, 434 flow [2023-08-31 21:11:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:11:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:11:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1067 transitions. [2023-08-31 21:11:00,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196283391405343 [2023-08-31 21:11:00,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1067 transitions. [2023-08-31 21:11:00,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1067 transitions. [2023-08-31 21:11:00,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:11:00,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1067 transitions. [2023-08-31 21:11:00,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.6666666666667) internal successors, (1067), 3 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:00,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:00,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:00,958 INFO L175 Difference]: Start difference. First operand has 149 places, 160 transitions, 336 flow. Second operand 3 states and 1067 transitions. [2023-08-31 21:11:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 150 transitions, 434 flow [2023-08-31 21:11:00,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 150 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:11:00,972 INFO L231 Difference]: Finished difference. Result has 152 places, 129 transitions, 278 flow [2023-08-31 21:11:00,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=152, PETRI_TRANSITIONS=129} [2023-08-31 21:11:00,976 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, 3 predicate places. [2023-08-31 21:11:00,977 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 129 transitions, 278 flow [2023-08-31 21:11:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:00,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:11:00,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:11:00,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:11:00,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:11:00,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:11:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -944604144, now seen corresponding path program 1 times [2023-08-31 21:11:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:11:00,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691976899] [2023-08-31 21:11:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:11:00,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:11:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:11:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:01,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:11:01,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691976899] [2023-08-31 21:11:01,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691976899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:11:01,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833850639] [2023-08-31 21:11:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:11:01,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:11:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:11:01,118 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) [2023-08-31 21:11:01,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 21:11:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:11:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:11:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:11:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:01,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:11:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:01,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833850639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:11:01,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:11:01,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 21:11:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38417100] [2023-08-31 21:11:01,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:11:01,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 21:11:01,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:11:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 21:11:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 21:11:01,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 574 [2023-08-31 21:11:01,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 129 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 332.5) internal successors, (1995), 6 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:01,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:11:01,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 574 [2023-08-31 21:11:01,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:11:02,170 INFO L130 PetriNetUnfolder]: 2647/7411 cut-off events. [2023-08-31 21:11:02,171 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 21:11:02,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11692 conditions, 7411 events. 2647/7411 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 62034 event pairs, 2518 based on Foata normal form. 0/6708 useless extension candidates. Maximal degree in co-relation 11679. Up to 4216 conditions per place. [2023-08-31 21:11:02,196 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 48 selfloop transitions, 5 changer transitions 0/132 dead transitions. [2023-08-31 21:11:02,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 132 transitions, 396 flow [2023-08-31 21:11:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:11:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:11:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2042 transitions. [2023-08-31 21:11:02,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5929152148664344 [2023-08-31 21:11:02,199 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2042 transitions. [2023-08-31 21:11:02,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2042 transitions. [2023-08-31 21:11:02,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:11:02,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2042 transitions. [2023-08-31 21:11:02,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 340.3333333333333) internal successors, (2042), 6 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:02,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:02,208 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:02,209 INFO L175 Difference]: Start difference. First operand has 152 places, 129 transitions, 278 flow. Second operand 6 states and 2042 transitions. [2023-08-31 21:11:02,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 132 transitions, 396 flow [2023-08-31 21:11:02,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 132 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 21:11:02,213 INFO L231 Difference]: Finished difference. Result has 140 places, 132 transitions, 310 flow [2023-08-31 21:11:02,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=140, PETRI_TRANSITIONS=132} [2023-08-31 21:11:02,214 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, -9 predicate places. [2023-08-31 21:11:02,214 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 132 transitions, 310 flow [2023-08-31 21:11:02,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 332.5) internal successors, (1995), 6 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:02,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:11:02,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 21:11:02,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 21:11:02,423 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 [2023-08-31 21:11:02,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:11:02,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:11:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash 489225722, now seen corresponding path program 2 times [2023-08-31 21:11:02,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:11:02,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536580983] [2023-08-31 21:11:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:11:02,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:11:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:11:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:02,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:11:02,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536580983] [2023-08-31 21:11:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536580983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:11:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116477893] [2023-08-31 21:11:02,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:11:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:11:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:11:02,659 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) [2023-08-31 21:11:02,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 21:11:02,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:11:02,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:11:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:11:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:11:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:02,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:11:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116477893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:11:02,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:11:02,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-31 21:11:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261009165] [2023-08-31 21:11:02,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:11:02,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 21:11:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:11:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 21:11:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-31 21:11:02,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 574 [2023-08-31 21:11:02,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 132 transitions, 310 flow. Second operand has 12 states, 12 states have (on average 332.25) internal successors, (3987), 12 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:02,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:11:02,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 574 [2023-08-31 21:11:02,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:11:03,873 INFO L130 PetriNetUnfolder]: 2647/7417 cut-off events. [2023-08-31 21:11:03,873 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-31 21:11:03,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11729 conditions, 7417 events. 2647/7417 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 62007 event pairs, 2518 based on Foata normal form. 6/6721 useless extension candidates. Maximal degree in co-relation 11670. Up to 4216 conditions per place. [2023-08-31 21:11:03,891 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 48 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2023-08-31 21:11:03,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 138 transitions, 464 flow [2023-08-31 21:11:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:11:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:11:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4037 transitions. [2023-08-31 21:11:03,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860917537746806 [2023-08-31 21:11:03,898 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4037 transitions. [2023-08-31 21:11:03,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4037 transitions. [2023-08-31 21:11:03,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:11:03,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4037 transitions. [2023-08-31 21:11:03,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 336.4166666666667) internal successors, (4037), 12 states have internal predecessors, (4037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:03,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:03,916 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:03,916 INFO L175 Difference]: Start difference. First operand has 140 places, 132 transitions, 310 flow. Second operand 12 states and 4037 transitions. [2023-08-31 21:11:03,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 138 transitions, 464 flow [2023-08-31 21:11:03,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 138 transitions, 450 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:11:03,919 INFO L231 Difference]: Finished difference. Result has 156 places, 138 transitions, 380 flow [2023-08-31 21:11:03,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=380, PETRI_PLACES=156, PETRI_TRANSITIONS=138} [2023-08-31 21:11:03,920 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, 7 predicate places. [2023-08-31 21:11:03,920 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 138 transitions, 380 flow [2023-08-31 21:11:03,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 332.25) internal successors, (3987), 12 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:11:03,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:11:03,922 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 21:11:03,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 21:11:04,127 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 [2023-08-31 21:11:04,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:11:04,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:11:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash -901437894, now seen corresponding path program 3 times [2023-08-31 21:11:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:11:04,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383668098] [2023-08-31 21:11:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:11:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:11:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:11:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:11:04,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:11:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383668098] [2023-08-31 21:11:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383668098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:11:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534485463] [2023-08-31 21:11:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 21:11:04,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:11:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:11:04,491 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) [2023-08-31 21:11:04,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process Killed by 15