./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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_74-tricky_address1_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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:09:36,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:09:36,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:09:36,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:09:36,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:09:36,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:09:36,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:09:36,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:09:36,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:09:36,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:09:36,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:09:36,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:09:36,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:09:36,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:09:36,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:09:36,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:09:36,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:09:37,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:09:37,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:09:37,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:09:37,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:09:37,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:09:37,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:09:37,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:09:37,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:09:37,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:09:37,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:09:37,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:09:37,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:09:37,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:09:37,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:09:37,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:09:37,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:09:37,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:09:37,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:09:37,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:09:37,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:09:37,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:09:37,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:09:37,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:09:37,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:09:37,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:09:37,058 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:09:37,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:09:37,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:09:37,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:09:37,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:09:37,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:09:37,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:09:37,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:09:37,061 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:09:37,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:09:37,062 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:09:37,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:09:37,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:09:37,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:09:37,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:09:37,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:09:37,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:09:37,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:09:37,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:09:37,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:09:37,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:09:37,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:09:37,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:09:37,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:09:37,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:09:37,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:09:37,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:09:37,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:09:37,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:09:37,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:09:37,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:09:37,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:09:37,066 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:09:37,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:09:37,067 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:09:37,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:09:37,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:09:37,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:09:37,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:09:37,393 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:09:37,393 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:09:37,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-09-01 11:09:38,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:09:38,863 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:09:38,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-09-01 11:09:38,879 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f944222b/39bc21d50d7b48bfac0e5bef16e3d5c1/FLAG4ad4bac2d [2023-09-01 11:09:38,890 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f944222b/39bc21d50d7b48bfac0e5bef16e3d5c1 [2023-09-01 11:09:38,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:09:38,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:09:38,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:09:38,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:09:38,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:09:38,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:09:38" (1/1) ... [2023-09-01 11:09:38,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56df49e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:38, skipping insertion in model container [2023-09-01 11:09:38,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:09:38" (1/1) ... [2023-09-01 11:09:38,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:09:38,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:09:39,319 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_74-tricky_address1_racefree.i[41323,41336] [2023-09-01 11:09:39,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:09:39,374 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:09:39,408 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_74-tricky_address1_racefree.i[41323,41336] [2023-09-01 11:09:39,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:09:39,499 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:09:39,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39 WrapperNode [2023-09-01 11:09:39,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:09:39,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:09:39,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:09:39,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:09:39,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,573 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-09-01 11:09:39,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:09:39,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:09:39,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:09:39,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:09:39,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,624 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:09:39,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:09:39,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:09:39,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:09:39,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (1/1) ... [2023-09-01 11:09:39,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:09:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:39,669 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) [2023-09-01 11:09:39,673 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 [2023-09-01 11:09:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:09:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:09:39,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:09:39,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:09:39,702 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:09:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:09:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:09:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:09:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:09:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:09:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:09:39,705 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:09:39,891 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:09:39,892 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:09:40,112 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:09:40,119 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:09:40,121 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 11:09:40,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:09:40 BoogieIcfgContainer [2023-09-01 11:09:40,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:09:40,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:09:40,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:09:40,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:09:40,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:09:38" (1/3) ... [2023-09-01 11:09:40,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263db7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:09:40, skipping insertion in model container [2023-09-01 11:09:40,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:39" (2/3) ... [2023-09-01 11:09:40,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263db7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:09:40, skipping insertion in model container [2023-09-01 11:09:40,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:09:40" (3/3) ... [2023-09-01 11:09:40,130 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-09-01 11:09:40,152 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:09:40,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:09:40,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 11:09:40,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:09:40,217 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:09:40,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 388 flow [2023-09-01 11:09:40,309 INFO L130 PetriNetUnfolder]: 45/260 cut-off events. [2023-09-01 11:09:40,310 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 11:09:40,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 260 events. 45/260 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 817 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-09-01 11:09:40,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 388 flow [2023-09-01 11:09:40,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:40,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:40,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:40,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:40,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:40,388 INFO L130 PetriNetUnfolder]: 44/255 cut-off events. [2023-09-01 11:09:40,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:40,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 255 events. 44/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 776 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-09-01 11:09:40,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 10336 [2023-09-01 11:09:42,855 INFO L134 LiptonReduction]: Checked pairs total: 15158 [2023-09-01 11:09:42,856 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-09-01 11:09:42,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:42,881 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;@4cddf907, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:42,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:42,889 INFO L130 PetriNetUnfolder]: 7/31 cut-off events. [2023-09-01 11:09:42,889 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:42,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:42,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:09:42,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:42,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash -164803575, now seen corresponding path program 1 times [2023-09-01 11:09:42,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919549194] [2023-09-01 11:09:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:43,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:43,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919549194] [2023-09-01 11:09:43,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919549194] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:43,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:43,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:43,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842642318] [2023-09-01 11:09:43,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:43,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:43,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 341 [2023-09-01 11:09:43,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 65 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-09-01 11:09:43,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:43,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 341 [2023-09-01 11:09:43,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:43,353 INFO L130 PetriNetUnfolder]: 301/651 cut-off events. [2023-09-01 11:09:43,354 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:43,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3189 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-09-01 11:09:43,358 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 20 selfloop transitions, 2 changer transitions 19/46 dead transitions. [2023-09-01 11:09:43,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-09-01 11:09:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:09:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:09:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-09-01 11:09:43,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512218963831867 [2023-09-01 11:09:43,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-09-01 11:09:43,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-09-01 11:09:43,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:43,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-09-01 11:09:43,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2023-09-01 11:09:43,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2023-09-01 11:09:43,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2023-09-01 11:09:43,396 INFO L175 Difference]: Start difference. First operand has 45 places, 65 transitions, 135 flow. Second operand 3 states and 524 transitions. [2023-09-01 11:09:43,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-09-01 11:09:43,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:09:43,400 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 69 flow [2023-09-01 11:09:43,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-09-01 11:09:43,407 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-09-01 11:09:43,407 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 69 flow [2023-09-01 11:09:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-09-01 11:09:43,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:43,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:43,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:09:43,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:43,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash 716448256, now seen corresponding path program 1 times [2023-09-01 11:09:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:43,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348238508] [2023-09-01 11:09:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:43,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:43,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348238508] [2023-09-01 11:09:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348238508] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335373714] [2023-09-01 11:09:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:43,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:43,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:43,557 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) [2023-09-01 11:09:43,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:09:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:09:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:43,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:43,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335373714] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:43,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:43,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:09:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480299278] [2023-09-01 11:09:43,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:09:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:09:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:09:43,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 341 [2023-09-01 11:09:43,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 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) [2023-09-01 11:09:43,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:43,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 341 [2023-09-01 11:09:43,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:43,808 INFO L130 PetriNetUnfolder]: 47/128 cut-off events. [2023-09-01 11:09:43,808 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:43,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 47/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 108 conditions per place. [2023-09-01 11:09:43,809 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-09-01 11:09:43,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-09-01 11:09:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:09:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:09:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-09-01 11:09:43,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46529814271749753 [2023-09-01 11:09:43,825 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-09-01 11:09:43,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-09-01 11:09:43,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:43,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-09-01 11:09:43,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:43,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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) [2023-09-01 11:09:43,845 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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) [2023-09-01 11:09:43,845 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 69 flow. Second operand 6 states and 952 transitions. [2023-09-01 11:09:43,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-09-01 11:09:43,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:43,847 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-09-01 11:09:43,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-09-01 11:09:43,848 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-09-01 11:09:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-09-01 11:09:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 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) [2023-09-01 11:09:43,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:43,849 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:43,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:09:44,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:44,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:44,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1278120393, now seen corresponding path program 2 times [2023-09-01 11:09:44,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:44,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515142097] [2023-09-01 11:09:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:44,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:44,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515142097] [2023-09-01 11:09:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515142097] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:44,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142712567] [2023-09-01 11:09:44,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:09:44,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:44,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:44,173 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) [2023-09-01 11:09:44,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:09:44,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:09:44,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:09:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:09:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:44,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142712567] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:44,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:44,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:09:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724333745] [2023-09-01 11:09:44,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:09:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:09:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:09:44,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 341 [2023-09-01 11:09:44,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 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) [2023-09-01 11:09:44,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:44,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 341 [2023-09-01 11:09:44,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:44,454 INFO L130 PetriNetUnfolder]: 47/134 cut-off events. [2023-09-01 11:09:44,455 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 11:09:44,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 47/134 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 234. Up to 108 conditions per place. [2023-09-01 11:09:44,456 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-09-01 11:09:44,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-09-01 11:09:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:09:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:09:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1885 transitions. [2023-09-01 11:09:44,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46065493646138805 [2023-09-01 11:09:44,461 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1885 transitions. [2023-09-01 11:09:44,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1885 transitions. [2023-09-01 11:09:44,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:44,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1885 transitions. [2023-09-01 11:09:44,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.08333333333334) internal successors, (1885), 12 states have internal predecessors, (1885), 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) [2023-09-01 11:09:44,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 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) [2023-09-01 11:09:44,484 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 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) [2023-09-01 11:09:44,484 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1885 transitions. [2023-09-01 11:09:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-09-01 11:09:44,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:44,488 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-09-01 11:09:44,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-09-01 11:09:44,489 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-09-01 11:09:44,490 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-09-01 11:09:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 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) [2023-09-01 11:09:44,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:44,491 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:44,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:09:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:09:44,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:44,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash 766826089, now seen corresponding path program 3 times [2023-09-01 11:09:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:44,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988579488] [2023-09-01 11:09:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:44,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:44,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:09:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:44,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:09:44,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:09:44,786 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:09:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:09:44,788 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:09:44,790 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:09:44,790 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:09:44,790 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:09:44,829 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:09:44,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-09-01 11:09:44,879 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-09-01 11:09:44,880 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 11:09:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-09-01 11:09:44,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 260 transitions, 538 flow [2023-09-01 11:09:44,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 260 transitions, 538 flow [2023-09-01 11:09:44,889 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:44,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 260 transitions, 538 flow [2023-09-01 11:09:44,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 260 transitions, 538 flow [2023-09-01 11:09:44,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-09-01 11:09:44,955 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-09-01 11:09:44,956 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 11:09:44,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-09-01 11:09:44,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 31416 [2023-09-01 11:09:47,818 INFO L134 LiptonReduction]: Checked pairs total: 55124 [2023-09-01 11:09:47,819 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 11:09:47,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:47,822 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;@4cddf907, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:47,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:47,829 INFO L130 PetriNetUnfolder]: 38/115 cut-off events. [2023-09-01 11:09:47,829 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:09:47,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:47,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:47,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:47,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1123911026, now seen corresponding path program 1 times [2023-09-01 11:09:47,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:47,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064502267] [2023-09-01 11:09:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:47,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:47,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:47,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064502267] [2023-09-01 11:09:47,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064502267] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:47,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:47,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208438264] [2023-09-01 11:09:47,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:47,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:47,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 478 [2023-09-01 11:09:47,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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) [2023-09-01 11:09:47,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:47,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 478 [2023-09-01 11:09:47,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:49,033 INFO L130 PetriNetUnfolder]: 9872/15757 cut-off events. [2023-09-01 11:09:49,033 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 11:09:49,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30205 conditions, 15757 events. 9872/15757 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 104377 event pairs, 9112 based on Foata normal form. 2730/16056 useless extension candidates. Maximal degree in co-relation 12164. Up to 14349 conditions per place. [2023-09-01 11:09:49,076 INFO L137 encePairwiseOnDemand]: 444/478 looper letters, 36 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-09-01 11:09:49,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-09-01 11:09:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:09:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:09:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-09-01 11:09:49,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50139470013947 [2023-09-01 11:09:49,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-09-01 11:09:49,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-09-01 11:09:49,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:49,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-09-01 11:09:49,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 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) [2023-09-01 11:09:49,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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) [2023-09-01 11:09:49,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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) [2023-09-01 11:09:49,085 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 719 transitions. [2023-09-01 11:09:49,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-09-01 11:09:49,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:09:49,090 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-09-01 11:09:49,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-09-01 11:09:49,092 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-09-01 11:09:49,092 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-09-01 11:09:49,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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) [2023-09-01 11:09:49,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:49,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:49,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:09:49,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:49,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash -207077384, now seen corresponding path program 1 times [2023-09-01 11:09:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:49,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886341999] [2023-09-01 11:09:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:49,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:49,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886341999] [2023-09-01 11:09:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886341999] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280320489] [2023-09-01 11:09:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:49,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:49,149 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) [2023-09-01 11:09:49,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:09:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:09:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:49,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280320489] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:49,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:49,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:09:49,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127973183] [2023-09-01 11:09:49,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:49,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:09:49,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:09:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:09:49,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-09-01 11:09:49,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 210.71428571428572) internal successors, (1475), 7 states have internal predecessors, (1475), 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) [2023-09-01 11:09:49,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:49,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-09-01 11:09:49,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:49,561 INFO L130 PetriNetUnfolder]: 1738/2923 cut-off events. [2023-09-01 11:09:49,561 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-09-01 11:09:49,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 2923 events. 1738/2923 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16152 event pairs, 1617 based on Foata normal form. 0/2391 useless extension candidates. Maximal degree in co-relation 5636. Up to 2647 conditions per place. [2023-09-01 11:09:49,571 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-09-01 11:09:49,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 210 flow [2023-09-01 11:09:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:09:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:09:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1298 transitions. [2023-09-01 11:09:49,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525801952580195 [2023-09-01 11:09:49,575 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1298 transitions. [2023-09-01 11:09:49,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1298 transitions. [2023-09-01 11:09:49,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:49,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1298 transitions. [2023-09-01 11:09:49,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 216.33333333333334) internal successors, (1298), 6 states have internal predecessors, (1298), 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) [2023-09-01 11:09:49,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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) [2023-09-01 11:09:49,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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) [2023-09-01 11:09:49,582 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1298 transitions. [2023-09-01 11:09:49,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 210 flow [2023-09-01 11:09:49,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:49,584 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-09-01 11:09:49,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-09-01 11:09:49,585 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-09-01 11:09:49,585 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-09-01 11:09:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 210.71428571428572) internal successors, (1475), 7 states have internal predecessors, (1475), 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) [2023-09-01 11:09:49,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:49,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:09:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:49,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:49,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1964701426, now seen corresponding path program 2 times [2023-09-01 11:09:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:49,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107956065] [2023-09-01 11:09:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107956065] [2023-09-01 11:09:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107956065] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457414498] [2023-09-01 11:09:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:09:49,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:49,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:09:49,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:09:49,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:09:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:09:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:09:49,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:49,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457414498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:50,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:50,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:09:50,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384073065] [2023-09-01 11:09:50,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:50,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:09:50,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:09:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:09:50,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-09-01 11:09:50,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 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) [2023-09-01 11:09:50,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:50,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-09-01 11:09:50,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:50,321 INFO L130 PetriNetUnfolder]: 1738/2929 cut-off events. [2023-09-01 11:09:50,322 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 11:09:50,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 2929 events. 1738/2929 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16191 event pairs, 1617 based on Foata normal form. 6/2404 useless extension candidates. Maximal degree in co-relation 5621. Up to 2647 conditions per place. [2023-09-01 11:09:50,337 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-09-01 11:09:50,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 276 flow [2023-09-01 11:09:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:09:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:09:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2561 transitions. [2023-09-01 11:09:50,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464783821478382 [2023-09-01 11:09:50,347 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2561 transitions. [2023-09-01 11:09:50,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2561 transitions. [2023-09-01 11:09:50,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:50,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2561 transitions. [2023-09-01 11:09:50,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.41666666666666) internal successors, (2561), 12 states have internal predecessors, (2561), 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) [2023-09-01 11:09:50,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 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) [2023-09-01 11:09:50,361 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 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) [2023-09-01 11:09:50,362 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2561 transitions. [2023-09-01 11:09:50,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 276 flow [2023-09-01 11:09:50,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 262 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:50,365 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-09-01 11:09:50,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-09-01 11:09:50,366 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-09-01 11:09:50,366 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-09-01 11:09:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 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) [2023-09-01 11:09:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:50,368 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:50,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:09:50,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:50,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:50,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash -193054414, now seen corresponding path program 3 times [2023-09-01 11:09:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:50,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666611603] [2023-09-01 11:09:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:50,595 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:09:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:50,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:09:50,620 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:09:50,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:09:50,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:09:50,621 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:09:50,621 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:09:50,622 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:09:50,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:09:50,647 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:09:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-09-01 11:09:50,725 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-09-01 11:09:50,725 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 11:09:50,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-09-01 11:09:50,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 330 transitions, 690 flow [2023-09-01 11:09:50,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 330 transitions, 690 flow [2023-09-01 11:09:50,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:50,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 330 transitions, 690 flow [2023-09-01 11:09:50,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 330 transitions, 690 flow [2023-09-01 11:09:50,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-09-01 11:09:50,811 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-09-01 11:09:50,811 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 11:09:50,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-09-01 11:09:50,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 61608 [2023-09-01 11:09:54,185 INFO L134 LiptonReduction]: Checked pairs total: 109900 [2023-09-01 11:09:54,186 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-09-01 11:09:54,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:54,188 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cddf907, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:54,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:54,198 INFO L130 PetriNetUnfolder]: 65/186 cut-off events. [2023-09-01 11:09:54,198 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:09:54,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:54,199 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:54,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:54,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1033079782, now seen corresponding path program 1 times [2023-09-01 11:09:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736629956] [2023-09-01 11:09:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:09:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:54,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736629956] [2023-09-01 11:09:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736629956] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823953135] [2023-09-01 11:09:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:54,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 601 [2023-09-01 11:09:54,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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) [2023-09-01 11:09:54,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:54,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 601 [2023-09-01 11:09:54,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:14,539 INFO L130 PetriNetUnfolder]: 252661/348965 cut-off events. [2023-09-01 11:10:14,539 INFO L131 PetriNetUnfolder]: For 3589/3589 co-relation queries the response was YES. [2023-09-01 11:10:15,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8440. Compared 2625001 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-09-01 11:10:15,643 INFO L137 encePairwiseOnDemand]: 556/601 looper letters, 53 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-09-01 11:10:15,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-09-01 11:10:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:10:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:10:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-09-01 11:10:15,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063782584581253 [2023-09-01 11:10:15,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-09-01 11:10:15,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-09-01 11:10:15,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:15,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-09-01 11:10:15,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 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) [2023-09-01 11:10:15,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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) [2023-09-01 11:10:15,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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) [2023-09-01 11:10:15,653 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 913 transitions. [2023-09-01 11:10:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-09-01 11:10:15,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:10:15,659 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-09-01 11:10:15,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-09-01 11:10:15,660 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-09-01 11:10:15,660 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-09-01 11:10:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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) [2023-09-01 11:10:15,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:15,661 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:10:15,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:15,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1353270178, now seen corresponding path program 1 times [2023-09-01 11:10:15,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233924682] [2023-09-01 11:10:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:15,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233924682] [2023-09-01 11:10:15,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233924682] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:15,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527797272] [2023-09-01 11:10:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:15,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:15,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:15,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:10:15,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:10:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:10:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:15,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527797272] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:15,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:15,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:10:15,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789427565] [2023-09-01 11:10:15,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:10:15,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:15,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:10:15,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:10:15,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 601 [2023-09-01 11:10:15,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 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) [2023-09-01 11:10:15,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:15,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 601 [2023-09-01 11:10:15,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:18,992 INFO L130 PetriNetUnfolder]: 46210/64953 cut-off events. [2023-09-01 11:10:18,993 INFO L131 PetriNetUnfolder]: For 1816/1816 co-relation queries the response was YES. [2023-09-01 11:10:19,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127740 conditions, 64953 events. 46210/64953 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431889 event pairs, 43965 based on Foata normal form. 0/53862 useless extension candidates. Maximal degree in co-relation 127726. Up to 61443 conditions per place. [2023-09-01 11:10:19,226 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-09-01 11:10:19,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 291 flow [2023-09-01 11:10:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:10:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:10:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1645 transitions. [2023-09-01 11:10:19,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561841375485302 [2023-09-01 11:10:19,230 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1645 transitions. [2023-09-01 11:10:19,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1645 transitions. [2023-09-01 11:10:19,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:19,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1645 transitions. [2023-09-01 11:10:19,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.1666666666667) internal successors, (1645), 6 states have internal predecessors, (1645), 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) [2023-09-01 11:10:19,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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) [2023-09-01 11:10:19,239 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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) [2023-09-01 11:10:19,239 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1645 transitions. [2023-09-01 11:10:19,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 291 flow [2023-09-01 11:10:19,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 281 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:19,242 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-09-01 11:10:19,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-09-01 11:10:19,243 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-09-01 11:10:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-09-01 11:10:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 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) [2023-09-01 11:10:19,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:19,244 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:19,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:10:19,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 11:10:19,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:19,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash 756541926, now seen corresponding path program 2 times [2023-09-01 11:10:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:19,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066540964] [2023-09-01 11:10:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:19,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066540964] [2023-09-01 11:10:19,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066540964] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469760312] [2023-09-01 11:10:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:10:19,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:19,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:10:19,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:10:19,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:10:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:10:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:10:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:19,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469760312] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:19,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:10:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119585681] [2023-09-01 11:10:19,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:10:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:10:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:10:19,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 601 [2023-09-01 11:10:19,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 265.46153846153845) internal successors, (3451), 13 states have internal predecessors, (3451), 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) [2023-09-01 11:10:19,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:19,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 601 [2023-09-01 11:10:19,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:23,446 INFO L130 PetriNetUnfolder]: 46210/64959 cut-off events. [2023-09-01 11:10:23,446 INFO L131 PetriNetUnfolder]: For 822/822 co-relation queries the response was YES. [2023-09-01 11:10:23,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127353 conditions, 64959 events. 46210/64959 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431856 event pairs, 43965 based on Foata normal form. 6/53875 useless extension candidates. Maximal degree in co-relation 127293. Up to 61443 conditions per place. [2023-09-01 11:10:23,718 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-09-01 11:10:23,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 353 flow [2023-09-01 11:10:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:10:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:10:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3238 transitions. [2023-09-01 11:10:23,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489739323349972 [2023-09-01 11:10:23,725 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3238 transitions. [2023-09-01 11:10:23,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3238 transitions. [2023-09-01 11:10:23,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:23,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3238 transitions. [2023-09-01 11:10:23,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 269.8333333333333) internal successors, (3238), 12 states have internal predecessors, (3238), 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) [2023-09-01 11:10:23,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 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) [2023-09-01 11:10:23,742 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 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) [2023-09-01 11:10:23,742 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3238 transitions. [2023-09-01 11:10:23,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 353 flow [2023-09-01 11:10:23,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:23,745 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-09-01 11:10:23,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-09-01 11:10:23,745 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-09-01 11:10:23,745 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-09-01 11:10:23,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 265.46153846153845) internal successors, (3451), 13 states have internal predecessors, (3451), 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) [2023-09-01 11:10:23,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:23,747 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:23,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:10:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:23,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:23,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1545885414, now seen corresponding path program 3 times [2023-09-01 11:10:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937215639] [2023-09-01 11:10:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:23,979 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:10:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:23,999 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:10:23,999 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:10:24,000 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:10:24,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:10:24,000 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:10:24,001 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:10:24,001 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:10:24,001 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:10:24,032 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:10:24,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:24,144 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-09-01 11:10:24,145 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 11:10:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-09-01 11:10:24,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:24,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:24,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:24,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:24,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:24,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:24,279 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-09-01 11:10:24,280 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 11:10:24,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-09-01 11:10:24,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 101456 [2023-09-01 11:10:27,972 INFO L134 LiptonReduction]: Checked pairs total: 181238 [2023-09-01 11:10:27,972 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-09-01 11:10:27,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:27,974 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;@4cddf907, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:27,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:27,989 INFO L130 PetriNetUnfolder]: 88/256 cut-off events. [2023-09-01 11:10:27,990 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:10:27,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:27,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:27,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:27,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash -154404429, now seen corresponding path program 1 times [2023-09-01 11:10:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:27,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213728080] [2023-09-01 11:10:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 11:10:28,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213728080] [2023-09-01 11:10:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213728080] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042469944] [2023-09-01 11:10:28,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:28,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:28,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 724 [2023-09-01 11:10:28,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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) [2023-09-01 11:10:28,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:28,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 724 [2023-09-01 11:10:28,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand