./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:10:18,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:10:18,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:10:18,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:10:18,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:10:18,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:10:18,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:10:18,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:10:18,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:10:18,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:10:18,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:10:18,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:10:18,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:10:18,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:10:18,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:10:18,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:10:18,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:10:18,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:10:18,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:10:18,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:10:18,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:10:18,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:10:18,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:10:18,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:10:18,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:10:18,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:10:18,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:10:18,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:10:18,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:10:18,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:10:18,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:10:18,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:10:18,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:10:18,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:10:18,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:10:18,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:10:18,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:10:18,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:10:18,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:10:18,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:10:18,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:10:18,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:10:18,964 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:10:18,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:10:18,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:10:18,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:10:18,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:10:18,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:10:18,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:10:18,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:10:18,968 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:10:18,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:10:18,969 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:10:18,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:10:18,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:10:18,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:10:18,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:10:18,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:10:18,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:10:18,971 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:10:18,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:10:18,971 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:10:18,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:10:18,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:10:18,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:10:18,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:10:18,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:10:18,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:10:18,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:10:18,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:10:18,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:10:18,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:10:18,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:10:18,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:10:18,974 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:10:18,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:10:18,975 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:10:18,975 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:10:19,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:10:19,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:10:19,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:10:19,343 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:10:19,344 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:10:19,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-31 00:10:20,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:10:20,930 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:10:20,931 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-31 00:10:20,950 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53c0ea87/14d62bebb6084c02a33ade0b8b04b2cf/FLAG11783577f [2023-08-31 00:10:20,964 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53c0ea87/14d62bebb6084c02a33ade0b8b04b2cf [2023-08-31 00:10:20,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:10:20,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:10:20,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:10:20,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:10:20,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:10:20,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:10:20" (1/1) ... [2023-08-31 00:10:20,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b580120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:20, skipping insertion in model container [2023-08-31 00:10:20,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:10:20" (1/1) ... [2023-08-31 00:10:20,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:10:21,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:10:21,309 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_06-cond_racing1.i[41322,41335] [2023-08-31 00:10:21,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:10:21,351 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:10:21,414 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_06-cond_racing1.i[41322,41335] [2023-08-31 00:10:21,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:10:21,493 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:10:21,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21 WrapperNode [2023-08-31 00:10:21,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:10:21,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:10:21,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:10:21,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:10:21,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,563 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-08-31 00:10:21,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:10:21,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:10:21,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:10:21,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:10:21,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,604 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:10:21,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:10:21,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:10:21,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:10:21,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (1/1) ... [2023-08-31 00:10:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:10:21,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:10:21,652 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 00:10:21,660 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 00:10:21,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:10:21,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:10:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:10:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:10:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:10:21,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:10:21,690 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:10:21,690 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:10:21,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:10:21,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:10:21,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:10:21,691 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 00:10:21,824 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:10:21,828 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:10:22,102 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:10:22,110 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:10:22,110 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-31 00:10:22,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:10:22 BoogieIcfgContainer [2023-08-31 00:10:22,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:10:22,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:10:22,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:10:22,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:10:22,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:10:20" (1/3) ... [2023-08-31 00:10:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f936b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:10:22, skipping insertion in model container [2023-08-31 00:10:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:21" (2/3) ... [2023-08-31 00:10:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f936b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:10:22, skipping insertion in model container [2023-08-31 00:10:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:10:22" (3/3) ... [2023-08-31 00:10:22,120 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-08-31 00:10:22,127 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:10:22,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:10:22,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:10:22,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:10:22,224 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:10:22,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 119 transitions, 246 flow [2023-08-31 00:10:22,312 INFO L130 PetriNetUnfolder]: 23/161 cut-off events. [2023-08-31 00:10:22,312 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:10:22,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 23/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-31 00:10:22,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 119 transitions, 246 flow [2023-08-31 00:10:22,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 114 transitions, 233 flow [2023-08-31 00:10:22,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:22,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-31 00:10:22,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-31 00:10:22,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 114 transitions, 233 flow [2023-08-31 00:10:22,380 INFO L130 PetriNetUnfolder]: 22/156 cut-off events. [2023-08-31 00:10:22,380 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:22,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 22/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-31 00:10:22,384 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-31 00:10:25,475 INFO L134 LiptonReduction]: Checked pairs total: 4411 [2023-08-31 00:10:25,478 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-31 00:10:25,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:25,499 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;@6eac70a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:25,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:25,503 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-31 00:10:25,503 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:25,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:25,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:25,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:25,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash 14157000, now seen corresponding path program 1 times [2023-08-31 00:10:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283255379] [2023-08-31 00:10:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283255379] [2023-08-31 00:10:25,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283255379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:25,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:25,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:25,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953125569] [2023-08-31 00:10:25,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:25,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 217 [2023-08-31 00:10:25,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 00:10:25,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:25,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 217 [2023-08-31 00:10:25,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:25,946 INFO L130 PetriNetUnfolder]: 105/234 cut-off events. [2023-08-31 00:10:25,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 234 events. 105/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1040 event pairs, 0 based on Foata normal form. 22/211 useless extension candidates. Maximal degree in co-relation 443. Up to 214 conditions per place. [2023-08-31 00:10:25,952 INFO L137 encePairwiseOnDemand]: 204/217 looper letters, 22 selfloop transitions, 2 changer transitions 8/34 dead transitions. [2023-08-31 00:10:25,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 137 flow [2023-08-31 00:10:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-31 00:10:25,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407066052227343 [2023-08-31 00:10:25,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-31 00:10:25,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-31 00:10:25,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:26,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-31 00:10:26,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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 00:10:26,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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 00:10:26,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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 00:10:26,032 INFO L175 Difference]: Start difference. First operand has 27 places, 34 transitions, 73 flow. Second operand 3 states and 352 transitions. [2023-08-31 00:10:26,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 137 flow [2023-08-31 00:10:26,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:10:26,048 INFO L231 Difference]: Finished difference. Result has 30 places, 17 transitions, 47 flow [2023-08-31 00:10:26,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2023-08-31 00:10:26,053 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-31 00:10:26,053 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 47 flow [2023-08-31 00:10:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 00:10:26,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:26,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:10:26,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:10:26,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:26,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash 690972307, now seen corresponding path program 1 times [2023-08-31 00:10:26,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:26,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274391376] [2023-08-31 00:10:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:26,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:10:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:26,116 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:10:26,116 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:10:26,118 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:10:26,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:10:26,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:10:26,120 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:10:26,122 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:10:26,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:10:26,139 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:10:26,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-31 00:10:26,188 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-08-31 00:10:26,188 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:10:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-31 00:10:26,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 149 transitions, 316 flow [2023-08-31 00:10:26,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 149 transitions, 316 flow [2023-08-31 00:10:26,192 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:26,192 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-31 00:10:26,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-31 00:10:26,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-31 00:10:26,225 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-08-31 00:10:26,226 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:10:26,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-31 00:10:26,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-31 00:10:29,184 INFO L134 LiptonReduction]: Checked pairs total: 17120 [2023-08-31 00:10:29,185 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-31 00:10:29,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:29,188 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;@6eac70a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:29,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:29,191 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 00:10:29,191 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:29,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:29,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:29,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:29,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 23206963, now seen corresponding path program 1 times [2023-08-31 00:10:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766304459] [2023-08-31 00:10:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:29,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:29,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766304459] [2023-08-31 00:10:29,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766304459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:29,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:29,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:29,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325424085] [2023-08-31 00:10:29,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:29,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:29,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:29,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:29,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 264 [2023-08-31 00:10:29,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 00:10:29,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:29,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 264 [2023-08-31 00:10:29,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:29,556 INFO L130 PetriNetUnfolder]: 1446/2554 cut-off events. [2023-08-31 00:10:29,556 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-31 00:10:29,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4948 conditions, 2554 events. 1446/2554 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15320 event pairs, 648 based on Foata normal form. 269/2497 useless extension candidates. Maximal degree in co-relation 661. Up to 2327 conditions per place. [2023-08-31 00:10:29,565 INFO L137 encePairwiseOnDemand]: 246/264 looper letters, 28 selfloop transitions, 2 changer transitions 11/51 dead transitions. [2023-08-31 00:10:29,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2023-08-31 00:10:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-31 00:10:29,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441919191919192 [2023-08-31 00:10:29,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-31 00:10:29,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-31 00:10:29,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:29,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-31 00:10:29,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 00:10:29,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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 00:10:29,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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 00:10:29,579 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 431 transitions. [2023-08-31 00:10:29,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2023-08-31 00:10:29,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:10:29,581 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2023-08-31 00:10:29,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-31 00:10:29,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-31 00:10:29,583 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2023-08-31 00:10:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 00:10:29,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:29,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:10:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:10:29,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:29,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash 404661933, now seen corresponding path program 1 times [2023-08-31 00:10:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:29,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689071734] [2023-08-31 00:10:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:29,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:29,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:29,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689071734] [2023-08-31 00:10:29,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689071734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:10:29,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835010170] [2023-08-31 00:10:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:29,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:10:29,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:10:29,681 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 00:10:29,728 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 00:10:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:10:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:10:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:29,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:10:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:29,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835010170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:10:29,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:10:29,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:10:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991688966] [2023-08-31 00:10:29,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:10:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:10:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:10:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:10:29,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 264 [2023-08-31 00:10:29,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 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 00:10:29,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:29,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 264 [2023-08-31 00:10:29,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:30,033 INFO L130 PetriNetUnfolder]: 286/564 cut-off events. [2023-08-31 00:10:30,033 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-31 00:10:30,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 564 events. 286/564 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2707 event pairs, 89 based on Foata normal form. 70/632 useless extension candidates. Maximal degree in co-relation 800. Up to 346 conditions per place. [2023-08-31 00:10:30,036 INFO L137 encePairwiseOnDemand]: 261/264 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-31 00:10:30,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2023-08-31 00:10:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:10:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:10:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-31 00:10:30,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2023-08-31 00:10:30,039 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-31 00:10:30,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-31 00:10:30,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:30,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-31 00:10:30,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 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) [2023-08-31 00:10:30,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 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 00:10:30,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 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 00:10:30,044 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 654 transitions. [2023-08-31 00:10:30,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2023-08-31 00:10:30,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:10:30,046 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-31 00:10:30,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-31 00:10:30,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-08-31 00:10:30,047 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-31 00:10:30,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 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 00:10:30,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:30,048 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:10:30,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:10:30,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:10:30,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:30,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1652856533, now seen corresponding path program 1 times [2023-08-31 00:10:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:30,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835505157] [2023-08-31 00:10:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:30,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:30,277 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:10:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:30,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:10:30,295 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:10:30,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:10:30,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:10:30,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:10:30,296 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:10:30,297 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:10:30,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:10:30,315 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:10:30,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-08-31 00:10:30,360 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-08-31 00:10:30,360 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:10:30,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-08-31 00:10:30,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 179 transitions, 388 flow [2023-08-31 00:10:30,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 179 transitions, 388 flow [2023-08-31 00:10:30,366 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:30,366 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 179 transitions, 388 flow [2023-08-31 00:10:30,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 179 transitions, 388 flow [2023-08-31 00:10:30,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-08-31 00:10:30,397 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-08-31 00:10:30,397 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:10:30,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-08-31 00:10:30,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-08-31 00:10:33,449 INFO L134 LiptonReduction]: Checked pairs total: 34673 [2023-08-31 00:10:33,449 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-31 00:10:33,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:33,452 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;@6eac70a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:33,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:33,454 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-31 00:10:33,454 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:33,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:33,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:33,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:33,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 33550302, now seen corresponding path program 1 times [2023-08-31 00:10:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:33,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279756754] [2023-08-31 00:10:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:33,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:33,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279756754] [2023-08-31 00:10:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279756754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:33,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879621506] [2023-08-31 00:10:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:33,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:33,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 306 [2023-08-31 00:10:33,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 00:10:33,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:33,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 306 [2023-08-31 00:10:33,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:35,636 INFO L130 PetriNetUnfolder]: 17546/27122 cut-off events. [2023-08-31 00:10:35,636 INFO L131 PetriNetUnfolder]: For 799/799 co-relation queries the response was YES. [2023-08-31 00:10:35,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52466 conditions, 27122 events. 17546/27122 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 199821 event pairs, 11031 based on Foata normal form. 6554/30483 useless extension candidates. Maximal degree in co-relation 5539. Up to 24769 conditions per place. [2023-08-31 00:10:35,750 INFO L137 encePairwiseOnDemand]: 281/306 looper letters, 35 selfloop transitions, 2 changer transitions 13/65 dead transitions. [2023-08-31 00:10:35,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 258 flow [2023-08-31 00:10:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-31 00:10:35,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2023-08-31 00:10:35,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-31 00:10:35,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-31 00:10:35,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:35,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-31 00:10:35,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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 00:10:35,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 00:10:35,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 00:10:35,757 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 513 transitions. [2023-08-31 00:10:35,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 258 flow [2023-08-31 00:10:35,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:10:35,760 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 121 flow [2023-08-31 00:10:35,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-31 00:10:35,761 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-31 00:10:35,762 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 121 flow [2023-08-31 00:10:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 00:10:35,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:35,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:10:35,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:10:35,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:35,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:35,763 INFO L85 PathProgramCache]: Analyzing trace with hash 194957140, now seen corresponding path program 1 times [2023-08-31 00:10:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:35,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595292878] [2023-08-31 00:10:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:35,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:35,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595292878] [2023-08-31 00:10:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595292878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:10:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126624223] [2023-08-31 00:10:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:35,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:10:35,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:10:35,813 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 00:10:35,841 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 00:10:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:35,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:10:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:10:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:35,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:10:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:35,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126624223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:10:35,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:10:35,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:10:35,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759072203] [2023-08-31 00:10:35,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:10:35,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:10:35,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:10:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:10:35,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 306 [2023-08-31 00:10:35,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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 00:10:35,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:35,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 306 [2023-08-31 00:10:35,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:36,459 INFO L130 PetriNetUnfolder]: 3352/5864 cut-off events. [2023-08-31 00:10:36,460 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2023-08-31 00:10:36,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12686 conditions, 5864 events. 3352/5864 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 40732 event pairs, 355 based on Foata normal form. 511/6183 useless extension candidates. Maximal degree in co-relation 8894. Up to 3178 conditions per place. [2023-08-31 00:10:36,499 INFO L137 encePairwiseOnDemand]: 303/306 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-31 00:10:36,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 345 flow [2023-08-31 00:10:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:10:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:10:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-08-31 00:10:36,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108932461873639 [2023-08-31 00:10:36,502 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-08-31 00:10:36,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-08-31 00:10:36,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:36,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-08-31 00:10:36,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 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 00:10:36,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 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 00:10:36,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 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 00:10:36,509 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 121 flow. Second operand 6 states and 938 transitions. [2023-08-31 00:10:36,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 345 flow [2023-08-31 00:10:36,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 337 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:10:36,515 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-31 00:10:36,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-31 00:10:36,516 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-31 00:10:36,516 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-31 00:10:36,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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 00:10:36,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:36,517 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:10:36,527 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 00:10:36,722 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,SelfDestructingSolverStorable6 [2023-08-31 00:10:36,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:36,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash 672582438, now seen corresponding path program 1 times [2023-08-31 00:10:36,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:36,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581095036] [2023-08-31 00:10:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:36,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:36,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:10:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:36,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:10:36,754 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:10:36,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:10:36,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:10:36,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:10:36,755 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:10:36,756 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:10:36,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:10:36,779 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:10:36,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-08-31 00:10:36,893 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-08-31 00:10:36,893 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:10:36,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-08-31 00:10:36,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 209 transitions, 462 flow [2023-08-31 00:10:36,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 209 transitions, 462 flow [2023-08-31 00:10:36,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:36,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 209 transitions, 462 flow [2023-08-31 00:10:36,901 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 209 transitions, 462 flow [2023-08-31 00:10:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-08-31 00:10:36,954 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-08-31 00:10:36,954 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:10:36,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-08-31 00:10:36,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-08-31 00:10:40,284 INFO L134 LiptonReduction]: Checked pairs total: 64435 [2023-08-31 00:10:40,285 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-08-31 00:10:40,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:40,287 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;@6eac70a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:40,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:40,289 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 00:10:40,289 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:40,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:40,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash 45369677, now seen corresponding path program 1 times [2023-08-31 00:10:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570565851] [2023-08-31 00:10:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:40,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:40,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570565851] [2023-08-31 00:10:40,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570565851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:40,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:40,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:40,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13081003] [2023-08-31 00:10:40,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:40,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:40,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:40,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 354 [2023-08-31 00:10:40,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 00:10:40,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:40,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 354 [2023-08-31 00:10:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:11:07,552 INFO L130 PetriNetUnfolder]: 298488/412851 cut-off events. [2023-08-31 00:11:07,552 INFO L131 PetriNetUnfolder]: For 14302/14302 co-relation queries the response was YES. [2023-08-31 00:11:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808722 conditions, 412851 events. 298488/412851 cut-off events. For 14302/14302 co-relation queries the response was YES. Maximal size of possible extension queue 9094. Compared 3229527 event pairs, 281380 based on Foata normal form. 66925/446350 useless extension candidates. Maximal degree in co-relation 70570. Up to 387778 conditions per place. [2023-08-31 00:11:09,367 INFO L137 encePairwiseOnDemand]: 324/354 looper letters, 49 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2023-08-31 00:11:09,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-08-31 00:11:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:11:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:11:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-31 00:11:09,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630885122410546 [2023-08-31 00:11:09,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-31 00:11:09,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-31 00:11:09,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:11:09,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-31 00:11:09,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 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 00:11:09,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 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 00:11:09,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 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 00:11:09,375 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 598 transitions. [2023-08-31 00:11:09,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-08-31 00:11:09,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:11:09,382 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-08-31 00:11:09,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-08-31 00:11:09,383 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-31 00:11:09,383 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-08-31 00:11:09,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 00:11:09,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:09,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:11:09,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:11:09,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:09,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1153775683, now seen corresponding path program 1 times [2023-08-31 00:11:09,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:09,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962308529] [2023-08-31 00:11:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:09,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:11:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962308529] [2023-08-31 00:11:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962308529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:11:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100992492] [2023-08-31 00:11:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:09,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:11:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:11:09,422 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 00:11:09,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:11:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:11:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:11:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:11:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:09,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100992492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:11:09,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:11:09,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:11:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196951214] [2023-08-31 00:11:09,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:11:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:11:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:11:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:11:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:11:09,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 354 [2023-08-31 00:11:09,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 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 00:11:09,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:11:09,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 354 [2023-08-31 00:11:09,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:11:18,948 INFO L130 PetriNetUnfolder]: 123712/165886 cut-off events. [2023-08-31 00:11:18,948 INFO L131 PetriNetUnfolder]: For 14617/14617 co-relation queries the response was YES. [2023-08-31 00:11:19,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345087 conditions, 165886 events. 123712/165886 cut-off events. For 14617/14617 co-relation queries the response was YES. Maximal size of possible extension queue 4107. Compared 1146813 event pairs, 8332 based on Foata normal form. 738/166622 useless extension candidates. Maximal degree in co-relation 305761. Up to 105949 conditions per place. [2023-08-31 00:11:19,700 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 120 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2023-08-31 00:11:19,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 580 flow [2023-08-31 00:11:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:11:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:11:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1125 transitions. [2023-08-31 00:11:19,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296610169491526 [2023-08-31 00:11:19,703 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1125 transitions. [2023-08-31 00:11:19,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1125 transitions. [2023-08-31 00:11:19,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:11:19,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1125 transitions. [2023-08-31 00:11:19,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.5) internal successors, (1125), 6 states have internal predecessors, (1125), 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 00:11:19,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 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 00:11:19,710 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 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 00:11:19,710 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1125 transitions. [2023-08-31 00:11:19,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 580 flow [2023-08-31 00:11:19,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:11:19,719 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-31 00:11:19,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-31 00:11:19,720 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-31 00:11:19,720 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-31 00:11:19,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 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 00:11:19,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:19,721 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:11:19,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 00:11:19,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:11:19,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:19,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2088589946, now seen corresponding path program 1 times [2023-08-31 00:11:19,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:19,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663924803] [2023-08-31 00:11:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:19,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:11:19,945 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:11:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:11:19,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:11:19,972 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:11:19,973 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:11:19,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:11:19,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:11:19,973 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:11:19,975 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:11:19,975 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:11:20,001 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 00:11:20,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 538 flow [2023-08-31 00:11:20,090 INFO L130 PetriNetUnfolder]: 158/898 cut-off events. [2023-08-31 00:11:20,091 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:11:20,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 898 events. 158/898 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3848 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 620. Up to 80 conditions per place. [2023-08-31 00:11:20,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 239 transitions, 538 flow [2023-08-31 00:11:20,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 239 transitions, 538 flow [2023-08-31 00:11:20,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:11:20,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 239 transitions, 538 flow [2023-08-31 00:11:20,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 239 transitions, 538 flow [2023-08-31 00:11:20,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 538 flow [2023-08-31 00:11:20,169 INFO L130 PetriNetUnfolder]: 158/898 cut-off events. [2023-08-31 00:11:20,169 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:11:20,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 898 events. 158/898 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3848 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 620. Up to 80 conditions per place. [2023-08-31 00:11:20,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 31920 [2023-08-31 00:11:23,242 INFO L134 LiptonReduction]: Checked pairs total: 89067 [2023-08-31 00:11:23,242 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-31 00:11:23,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:11:23,244 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;@6eac70a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:11:23,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:11:23,246 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-31 00:11:23,246 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:11:23,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:23,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:11:23,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:23,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 58547274, now seen corresponding path program 1 times [2023-08-31 00:11:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:23,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562206161] [2023-08-31 00:11:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:23,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:11:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562206161] [2023-08-31 00:11:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562206161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:11:23,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:11:23,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:11:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787273802] [2023-08-31 00:11:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:11:23,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:11:23,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:11:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:11:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:11:23,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 398 [2023-08-31 00:11:23,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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 00:11:23,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:11:23,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 398 [2023-08-31 00:11:23,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand