./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.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_22-deref_read_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --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 00:14:37,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:14:37,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:14:37,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:14:37,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:14:37,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:14:37,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:14:37,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:14:37,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:14:37,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:14:37,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:14:37,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:14:37,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:14:37,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:14:37,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:14:37,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:14:37,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:14:37,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:14:37,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:14:37,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:14:37,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:14:37,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:14:37,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:14:37,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:14:37,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:14:37,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:14:37,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:14:37,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:14:37,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:14:37,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:14:37,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:14:37,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:14:37,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:14:37,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:14:37,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:14:37,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:14:37,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:14:37,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:14:37,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:14:37,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:14:37,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:14:37,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:14:37,981 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:14:37,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:14:37,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:14:37,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:14:37,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:14:37,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:14:37,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:14:37,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:14:37,984 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:14:37,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:14:37,985 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:14:37,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:14:37,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:14:37,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:14:37,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:14:37,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:14:37,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:14:37,986 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:14:37,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:14:37,986 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:14:37,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:14:37,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:14:37,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:14:37,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:14:37,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:14:37,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:14:37,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:14:37,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:14:37,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:14:37,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:14:37,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:14:37,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:14:37,988 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:14:37,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:14:37,988 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:14:37,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:14:38,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:14:38,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:14:38,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:14:38,226 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:14:38,226 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:14:38,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-31 00:14:39,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:14:39,384 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:14:39,385 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-31 00:14:39,398 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f6c1a4f/c75b2f3d817b480f94ee37fb8692b35b/FLAG7f760fba4 [2023-08-31 00:14:39,406 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f6c1a4f/c75b2f3d817b480f94ee37fb8692b35b [2023-08-31 00:14:39,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:14:39,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:14:39,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:14:39,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:14:39,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:14:39,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c2269a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39, skipping insertion in model container [2023-08-31 00:14:39,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:14:39,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:14:39,683 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_22-deref_read_racefree.i[30176,30189] [2023-08-31 00:14:39,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:14:39,706 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:14:39,735 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_22-deref_read_racefree.i[30176,30189] [2023-08-31 00:14:39,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:14:39,820 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:14:39,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39 WrapperNode [2023-08-31 00:14:39,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:14:39,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:14:39,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:14:39,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:14:39,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,870 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-08-31 00:14:39,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:14:39,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:14:39,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:14:39,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:14:39,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,887 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:14:39,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:14:39,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:14:39,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:14:39,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (1/1) ... [2023-08-31 00:14:39,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:14:39,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:39,926 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 00:14:39,935 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 00:14:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:14:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:14:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:14:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:14:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:14:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:14:39,956 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:14:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:14:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:14:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:14:39,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:14:39,957 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 00:14:40,088 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:14:40,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:14:40,225 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:14:40,229 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:14:40,229 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-31 00:14:40,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:14:40 BoogieIcfgContainer [2023-08-31 00:14:40,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:14:40,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:14:40,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:14:40,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:14:40,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:14:39" (1/3) ... [2023-08-31 00:14:40,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf9737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:14:40, skipping insertion in model container [2023-08-31 00:14:40,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:39" (2/3) ... [2023-08-31 00:14:40,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf9737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:14:40, skipping insertion in model container [2023-08-31 00:14:40,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:14:40" (3/3) ... [2023-08-31 00:14:40,236 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-08-31 00:14:40,241 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:14:40,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:14:40,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:14:40,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:14:40,305 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 00:14:40,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-31 00:14:40,374 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-08-31 00:14:40,375 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:40,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-31 00:14:40,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-08-31 00:14:40,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-08-31 00:14:40,384 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:40,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-31 00:14:40,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-31 00:14:40,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-31 00:14:40,415 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-08-31 00:14:40,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-31 00:14:40,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-08-31 00:14:42,491 INFO L134 LiptonReduction]: Checked pairs total: 4764 [2023-08-31 00:14:42,492 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-31 00:14:42,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:42,505 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;@3a4c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:42,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:14:42,508 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-31 00:14:42,508 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:42,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:42,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:14:42,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:42,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash 11987027, now seen corresponding path program 1 times [2023-08-31 00:14:42,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722644160] [2023-08-31 00:14:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:42,688 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 00:14:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:42,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722644160] [2023-08-31 00:14:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722644160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:42,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:42,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:14:42,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511119805] [2023-08-31 00:14:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:42,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:42,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:42,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2023-08-31 00:14:42,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 00:14:42,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:42,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2023-08-31 00:14:42,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:42,803 INFO L130 PetriNetUnfolder]: 72/176 cut-off events. [2023-08-31 00:14:42,804 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 176 events. 72/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 562 event pairs, 56 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2023-08-31 00:14:42,807 INFO L137 encePairwiseOnDemand]: 173/184 looper letters, 24 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-08-31 00:14:42,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 127 flow [2023-08-31 00:14:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-31 00:14:42,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2023-08-31 00:14:42,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-31 00:14:42,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-31 00:14:42,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:42,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-31 00:14:42,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 00:14:42,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 00:14:42,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 00:14:42,849 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 296 transitions. [2023-08-31 00:14:42,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 127 flow [2023-08-31 00:14:42,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:42,852 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-08-31 00:14:42,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-31 00:14:42,856 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-31 00:14:42,856 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-08-31 00:14:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 00:14:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:14:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:14:42,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:42,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1370191057, now seen corresponding path program 1 times [2023-08-31 00:14:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185146146] [2023-08-31 00:14:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:42,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:42,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:42,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:42,930 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:14:42,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:14:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:14:42,943 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:14:42,945 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:42,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:14:42,955 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 00:14:42,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-31 00:14:42,972 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-08-31 00:14:42,975 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:14:42,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-08-31 00:14:42,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-08-31 00:14:42,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-08-31 00:14:42,980 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:42,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-31 00:14:42,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-31 00:14:42,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-31 00:14:43,002 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-08-31 00:14:43,003 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:14:43,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-08-31 00:14:43,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-08-31 00:14:45,056 INFO L134 LiptonReduction]: Checked pairs total: 13795 [2023-08-31 00:14:45,056 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-31 00:14:45,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:45,058 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;@3a4c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:45,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:14:45,060 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-31 00:14:45,060 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:45,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:45,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:14:45,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:45,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash 20270096, now seen corresponding path program 1 times [2023-08-31 00:14:45,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518797580] [2023-08-31 00:14:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:45,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:45,101 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 00:14:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518797580] [2023-08-31 00:14:45,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518797580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:45,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:45,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:14:45,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986590871] [2023-08-31 00:14:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:45,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:45,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:45,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 236 [2023-08-31 00:14:45,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 00:14:45,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:45,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 236 [2023-08-31 00:14:45,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:45,303 INFO L130 PetriNetUnfolder]: 1441/2556 cut-off events. [2023-08-31 00:14:45,303 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 00:14:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 2556 events. 1441/2556 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 14565 event pairs, 640 based on Foata normal form. 360/2676 useless extension candidates. Maximal degree in co-relation 472. Up to 2332 conditions per place. [2023-08-31 00:14:45,310 INFO L137 encePairwiseOnDemand]: 219/236 looper letters, 34 selfloop transitions, 2 changer transitions 3/46 dead transitions. [2023-08-31 00:14:45,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 182 flow [2023-08-31 00:14:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-31 00:14:45,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508474576271186 [2023-08-31 00:14:45,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-31 00:14:45,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-31 00:14:45,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:45,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-31 00:14:45,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 00:14:45,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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 00:14:45,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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 00:14:45,318 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 3 states and 390 transitions. [2023-08-31 00:14:45,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 182 flow [2023-08-31 00:14:45,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:45,320 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 86 flow [2023-08-31 00:14:45,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-08-31 00:14:45,321 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-31 00:14:45,321 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 86 flow [2023-08-31 00:14:45,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 00:14:45,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:45,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:45,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:14:45,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:45,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash -273928485, now seen corresponding path program 1 times [2023-08-31 00:14:45,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:45,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914707313] [2023-08-31 00:14:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:45,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:45,388 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 00:14:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:45,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914707313] [2023-08-31 00:14:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914707313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:14:45,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058114883] [2023-08-31 00:14:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:45,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:14:45,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:45,392 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 00:14:45,416 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 00:14:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:14:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:14:45,507 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 00:14:45,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:14:45,521 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 00:14:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058114883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:14:45,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:14:45,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:14:45,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763323150] [2023-08-31 00:14:45,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:14:45,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:14:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:14:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:14:45,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 236 [2023-08-31 00:14:45,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 111.28571428571429) internal successors, (779), 7 states have internal predecessors, (779), 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 00:14:45,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:45,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 236 [2023-08-31 00:14:45,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:45,685 INFO L130 PetriNetUnfolder]: 421/856 cut-off events. [2023-08-31 00:14:45,685 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:14:45,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 856 events. 421/856 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4401 event pairs, 0 based on Foata normal form. 100/956 useless extension candidates. Maximal degree in co-relation 182. Up to 502 conditions per place. [2023-08-31 00:14:45,688 INFO L137 encePairwiseOnDemand]: 233/236 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-31 00:14:45,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-08-31 00:14:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:14:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:14:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 598 transitions. [2023-08-31 00:14:45,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067796610169492 [2023-08-31 00:14:45,691 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 598 transitions. [2023-08-31 00:14:45,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 598 transitions. [2023-08-31 00:14:45,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:45,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 598 transitions. [2023-08-31 00:14:45,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.6) internal successors, (598), 5 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 00:14:45,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 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 00:14:45,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 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 00:14:45,697 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 86 flow. Second operand 5 states and 598 transitions. [2023-08-31 00:14:45,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-08-31 00:14:45,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:14:45,700 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-31 00:14:45,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, 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 00:14:45,702 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-31 00:14:45,702 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-31 00:14:45,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.28571428571429) internal successors, (779), 7 states have internal predecessors, (779), 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 00:14:45,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:45,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:14:45,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 00:14:45,906 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 00:14:45,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:45,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash -804893670, now seen corresponding path program 1 times [2023-08-31 00:14:45,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:45,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875268822] [2023-08-31 00:14:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:45,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:45,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:45,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:45,949 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:45,950 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:14:45,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:14:45,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:14:45,950 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:14:45,951 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:45,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:14:45,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 00:14:45,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-08-31 00:14:45,989 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-08-31 00:14:45,989 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 00:14:45,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-31 00:14:45,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 166 transitions, 353 flow [2023-08-31 00:14:45,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 166 transitions, 353 flow [2023-08-31 00:14:45,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:45,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 166 transitions, 353 flow [2023-08-31 00:14:45,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 166 transitions, 353 flow [2023-08-31 00:14:45,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-08-31 00:14:46,009 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-08-31 00:14:46,010 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 00:14:46,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-31 00:14:46,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-08-31 00:14:48,296 INFO L134 LiptonReduction]: Checked pairs total: 31714 [2023-08-31 00:14:48,296 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-31 00:14:48,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:48,298 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;@3a4c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:48,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:14:48,299 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-31 00:14:48,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:48,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:48,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:14:48,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:48,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash 30179040, now seen corresponding path program 1 times [2023-08-31 00:14:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:48,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789668846] [2023-08-31 00:14:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:48,332 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 00:14:48,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789668846] [2023-08-31 00:14:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789668846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:48,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:48,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:14:48,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386540346] [2023-08-31 00:14:48,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:48,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:48,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:48,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:48,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 289 [2023-08-31 00:14:48,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 67 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 00:14:48,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:48,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 289 [2023-08-31 00:14:48,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:50,126 INFO L130 PetriNetUnfolder]: 20233/30021 cut-off events. [2023-08-31 00:14:50,126 INFO L131 PetriNetUnfolder]: For 597/597 co-relation queries the response was YES. [2023-08-31 00:14:50,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58876 conditions, 30021 events. 20233/30021 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 198030 event pairs, 19318 based on Foata normal form. 5058/33014 useless extension candidates. Maximal degree in co-relation 22879. Up to 28406 conditions per place. [2023-08-31 00:14:50,225 INFO L137 encePairwiseOnDemand]: 266/289 looper letters, 42 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-08-31 00:14:50,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 229 flow [2023-08-31 00:14:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-31 00:14:50,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559400230680508 [2023-08-31 00:14:50,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-31 00:14:50,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-31 00:14:50,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:50,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-31 00:14:50,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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 00:14:50,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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 00:14:50,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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 00:14:50,230 INFO L175 Difference]: Start difference. First operand has 54 places, 67 transitions, 155 flow. Second operand 3 states and 482 transitions. [2023-08-31 00:14:50,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 229 flow [2023-08-31 00:14:50,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 223 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:50,233 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 115 flow [2023-08-31 00:14:50,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-31 00:14:50,235 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-31 00:14:50,235 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 115 flow [2023-08-31 00:14:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 00:14:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:14:50,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:50,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:50,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1655288508, now seen corresponding path program 1 times [2023-08-31 00:14:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15920769] [2023-08-31 00:14:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:50,278 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 00:14:50,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:50,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15920769] [2023-08-31 00:14:50,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15920769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:14:50,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849529129] [2023-08-31 00:14:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:50,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:14:50,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:50,281 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 00:14:50,283 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 00:14:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:14:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:14:50,356 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 00:14:50,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:14:50,366 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 00:14:50,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849529129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:14:50,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:14:50,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:14:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995289453] [2023-08-31 00:14:50,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:14:50,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:14:50,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:14:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:14:50,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 289 [2023-08-31 00:14:50,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 137.28571428571428) internal successors, (961), 7 states have internal predecessors, (961), 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 00:14:50,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:50,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 289 [2023-08-31 00:14:50,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:51,098 INFO L130 PetriNetUnfolder]: 6205/10135 cut-off events. [2023-08-31 00:14:51,099 INFO L131 PetriNetUnfolder]: For 1008/1008 co-relation queries the response was YES. [2023-08-31 00:14:51,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21104 conditions, 10135 events. 6205/10135 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 67601 event pairs, 0 based on Foata normal form. 909/11043 useless extension candidates. Maximal degree in co-relation 2406. Up to 5958 conditions per place. [2023-08-31 00:14:51,129 INFO L137 encePairwiseOnDemand]: 286/289 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-31 00:14:51,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2023-08-31 00:14:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:14:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:14:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-08-31 00:14:51,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184544405997693 [2023-08-31 00:14:51,131 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-08-31 00:14:51,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-08-31 00:14:51,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:51,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-08-31 00:14:51,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 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 00:14:51,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 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 00:14:51,137 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 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 00:14:51,137 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 115 flow. Second operand 6 states and 899 transitions. [2023-08-31 00:14:51,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2023-08-31 00:14:51,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:14:51,139 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-31 00:14:51,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, 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 00:14:51,141 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-31 00:14:51,143 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-31 00:14:51,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.28571428571428) internal successors, (961), 7 states have internal predecessors, (961), 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 00:14:51,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:51,144 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:14:51,150 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 00:14:51,348 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 00:14:51,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:51,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1022284815, now seen corresponding path program 1 times [2023-08-31 00:14:51,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:51,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738239305] [2023-08-31 00:14:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:51,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:51,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:51,386 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:51,386 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:14:51,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:14:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:14:51,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:14:51,388 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:51,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:14:51,407 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 00:14:51,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-08-31 00:14:51,427 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-08-31 00:14:51,427 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 00:14:51,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-08-31 00:14:51,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 199 transitions, 430 flow [2023-08-31 00:14:51,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 199 transitions, 430 flow [2023-08-31 00:14:51,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:51,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 199 transitions, 430 flow [2023-08-31 00:14:51,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 199 transitions, 430 flow [2023-08-31 00:14:51,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-08-31 00:14:51,448 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-08-31 00:14:51,448 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 00:14:51,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-08-31 00:14:51,458 INFO L119 LiptonReduction]: Number of co-enabled transitions 22144 [2023-08-31 00:14:53,808 INFO L134 LiptonReduction]: Checked pairs total: 56439 [2023-08-31 00:14:53,808 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-08-31 00:14:53,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:53,810 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;@3a4c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:53,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:14:53,811 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-31 00:14:53,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:53,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:53,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:14:53,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:53,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 41725736, now seen corresponding path program 1 times [2023-08-31 00:14:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:53,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700678871] [2023-08-31 00:14:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:53,846 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 00:14:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:53,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700678871] [2023-08-31 00:14:53,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700678871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:53,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:14:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311152128] [2023-08-31 00:14:53,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:53,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:53,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:53,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 342 [2023-08-31 00:14:53,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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 00:14:53,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:53,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 342 [2023-08-31 00:14:53,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:15:24,731 INFO L130 PetriNetUnfolder]: 452675/587947 cut-off events. [2023-08-31 00:15:24,732 INFO L131 PetriNetUnfolder]: For 13849/13849 co-relation queries the response was YES. [2023-08-31 00:15:25,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179668 conditions, 587947 events. 452675/587947 cut-off events. For 13849/13849 co-relation queries the response was YES. Maximal size of possible extension queue 10218. Compared 3861958 event pairs, 439492 based on Foata normal form. 61092/618582 useless extension candidates. Maximal degree in co-relation 94282. Up to 584426 conditions per place. [2023-08-31 00:15:26,890 INFO L137 encePairwiseOnDemand]: 313/342 looper letters, 58 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2023-08-31 00:15:26,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 298 flow [2023-08-31 00:15:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:15:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:15:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-08-31 00:15:26,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2023-08-31 00:15:26,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-08-31 00:15:26,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-08-31 00:15:26,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:15:26,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-08-31 00:15:26,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 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 00:15:26,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 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 00:15:26,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 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 00:15:26,897 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 202 flow. Second operand 3 states and 582 transitions. [2023-08-31 00:15:26,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 298 flow [2023-08-31 00:15:26,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 286 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-31 00:15:26,908 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 144 flow [2023-08-31 00:15:26,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-31 00:15:26,910 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-31 00:15:26,910 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 144 flow [2023-08-31 00:15:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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 00:15:26,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:15:26,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:15:26,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:15:26,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:15:26,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:15:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -848622150, now seen corresponding path program 1 times [2023-08-31 00:15:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:15:26,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580881077] [2023-08-31 00:15:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:15:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:15:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:15:26,940 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 00:15:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:15:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580881077] [2023-08-31 00:15:26,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580881077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:15:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538794320] [2023-08-31 00:15:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:15:26,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:15:26,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:15:26,944 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 00:15:26,945 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 00:15:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:15:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:15:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:15:27,018 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 00:15:27,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:15:27,039 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 00:15:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538794320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:15:27,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:15:27,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:15:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434122378] [2023-08-31 00:15:27,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:15:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:15:27,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:15:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:15:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:15:27,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 342 [2023-08-31 00:15:27,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 00:15:27,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:15:27,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 342 [2023-08-31 00:15:27,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:15:45,463 INFO L130 PetriNetUnfolder]: 286856/375791 cut-off events. [2023-08-31 00:15:45,463 INFO L131 PetriNetUnfolder]: For 15970/15970 co-relation queries the response was YES. [2023-08-31 00:15:46,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779670 conditions, 375791 events. 286856/375791 cut-off events. For 15970/15970 co-relation queries the response was YES. Maximal size of possible extension queue 7018. Compared 2501396 event pairs, 12100 based on Foata normal form. 1330/377120 useless extension candidates. Maximal degree in co-relation 79638. Up to 246357 conditions per place. [2023-08-31 00:15:47,052 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 146 selfloop transitions, 6 changer transitions 0/159 dead transitions. [2023-08-31 00:15:47,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 656 flow [2023-08-31 00:15:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:15:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:15:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1121 transitions. [2023-08-31 00:15:47,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2023-08-31 00:15:47,055 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1121 transitions. [2023-08-31 00:15:47,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1121 transitions. [2023-08-31 00:15:47,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:15:47,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1121 transitions. [2023-08-31 00:15:47,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.83333333333334) internal successors, (1121), 6 states have internal predecessors, (1121), 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 00:15:47,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 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 00:15:47,060 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 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 00:15:47,060 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 144 flow. Second operand 6 states and 1121 transitions. [2023-08-31 00:15:47,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 656 flow [2023-08-31 00:15:47,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:15:47,063 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-31 00:15:47,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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 00:15:47,064 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2023-08-31 00:15:47,064 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-31 00:15:47,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 00:15:47,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:15:47,064 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:15:47,071 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 00:15:47,268 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 00:15:47,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:15:47,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:15:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1232132437, now seen corresponding path program 1 times [2023-08-31 00:15:47,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:15:47,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543400611] [2023-08-31 00:15:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:15:47,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:15:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:15:47,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:15:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:15:47,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:15:47,305 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:15:47,305 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:15:47,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:15:47,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:15:47,305 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:15:47,306 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:15:47,306 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:15:47,324 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 00:15:47,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 509 flow [2023-08-31 00:15:47,352 INFO L130 PetriNetUnfolder]: 54/407 cut-off events. [2023-08-31 00:15:47,353 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 00:15:47,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 407 events. 54/407 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1325 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 351. Up to 12 conditions per place. [2023-08-31 00:15:47,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 232 transitions, 509 flow [2023-08-31 00:15:47,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 232 transitions, 509 flow [2023-08-31 00:15:47,356 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:15:47,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 232 transitions, 509 flow [2023-08-31 00:15:47,357 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 232 transitions, 509 flow [2023-08-31 00:15:47,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 509 flow [2023-08-31 00:15:47,381 INFO L130 PetriNetUnfolder]: 54/407 cut-off events. [2023-08-31 00:15:47,382 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 00:15:47,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 407 events. 54/407 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1325 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 351. Up to 12 conditions per place. [2023-08-31 00:15:47,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 32960 [2023-08-31 00:15:49,841 INFO L134 LiptonReduction]: Checked pairs total: 74358 [2023-08-31 00:15:49,841 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-08-31 00:15:49,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:15:49,842 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;@3a4c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:15:49,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:15:49,843 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-31 00:15:49,843 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:15:49,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:15:49,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:15:49,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:15:49,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:15:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 54896516, now seen corresponding path program 1 times [2023-08-31 00:15:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:15:49,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070518515] [2023-08-31 00:15:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:15:49,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:15:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:15:49,860 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 00:15:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:15:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070518515] [2023-08-31 00:15:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070518515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:15:49,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:15:49,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:15:49,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894927964] [2023-08-31 00:15:49,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:15:49,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:15:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:15:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:15:49,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:15:49,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 395 [2023-08-31 00:15:49,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 00:15:49,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:15:49,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 395 [2023-08-31 00:15:49,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand