./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.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 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:28:36,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:28:36,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:28:36,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:28:36,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:28:36,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:28:36,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:28:36,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:28:36,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:28:36,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:28:36,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:28:36,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:28:36,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:28:36,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:28:36,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:28:36,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:28:36,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:28:36,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:28:36,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:28:36,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:28:36,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:28:36,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:28:36,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:28:36,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:28:36,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:28:36,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:28:36,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:28:36,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:28:36,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:28:36,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:28:36,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:28:36,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:28:36,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:28:36,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:28:36,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:28:36,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:28:36,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:28:36,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:28:36,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:28:36,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:28:36,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:28:36,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:28:36,887 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:28:36,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:28:36,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:28:36,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:28:36,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:28:36,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:28:36,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:28:36,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:28:36,890 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:28:36,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:28:36,891 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:28:36,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:28:36,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:28:36,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:28:36,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:28:36,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:28:36,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:28:36,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:28:36,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:28:36,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:28:36,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:28:36,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:28:36,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:28:36,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:28:36,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:28:36,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:28:36,895 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:28:36,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:28:36,895 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:28:36,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:28:37,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:28:37,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:28:37,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:28:37,183 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:28:37,183 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:28:37,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-31 00:28:38,181 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:28:38,378 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:28:38,379 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-31 00:28:38,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53f8cd7a/5098709e8041434da4c7c56ce917338a/FLAG1cbd076e2 [2023-08-31 00:28:38,415 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53f8cd7a/5098709e8041434da4c7c56ce917338a [2023-08-31 00:28:38,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:28:38,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:28:38,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:28:38,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:28:38,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:28:38,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49442248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38, skipping insertion in model container [2023-08-31 00:28:38,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:28:38,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:28:38,758 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_78-equ_racing.i[47038,47051] [2023-08-31 00:28:38,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:28:38,797 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:28:38,826 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_78-equ_racing.i[47038,47051] [2023-08-31 00:28:38,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:28:38,898 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:28:38,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38 WrapperNode [2023-08-31 00:28:38,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:28:38,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:28:38,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:28:38,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:28:38,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,962 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-31 00:28:38,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:28:38,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:28:38,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:28:38,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:28:38,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:38,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:39,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:39,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:28:39,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:28:39,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:28:39,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:28:39,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (1/1) ... [2023-08-31 00:28:39,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:28:39,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:28:39,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:28:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:28:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:28:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:28:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:28:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:28:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:28:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:28:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:28:39,057 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:28:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:28:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:28:39,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:28:39,058 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:28:39,201 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:28:39,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:28:39,394 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:28:39,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:28:39,400 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-31 00:28:39,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:28:39 BoogieIcfgContainer [2023-08-31 00:28:39,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:28:39,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:28:39,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:28:39,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:28:39,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:28:38" (1/3) ... [2023-08-31 00:28:39,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a651a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:28:39, skipping insertion in model container [2023-08-31 00:28:39,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:28:38" (2/3) ... [2023-08-31 00:28:39,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a651a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:28:39, skipping insertion in model container [2023-08-31 00:28:39,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:28:39" (3/3) ... [2023-08-31 00:28:39,407 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-08-31 00:28:39,412 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:28:39,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:28:39,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-31 00:28:39,418 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:28:39,461 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:28:39,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-08-31 00:28:39,557 INFO L130 PetriNetUnfolder]: 43/271 cut-off events. [2023-08-31 00:28:39,557 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:28:39,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-31 00:28:39,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-08-31 00:28:39,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-08-31 00:28:39,567 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:28:39,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-31 00:28:39,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-31 00:28:39,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-08-31 00:28:39,604 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2023-08-31 00:28:39,604 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:28:39,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-31 00:28:39,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-08-31 00:28:45,294 INFO L134 LiptonReduction]: Checked pairs total: 18412 [2023-08-31 00:28:45,295 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-31 00:28:45,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:28:45,309 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;@7ad7d2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:28:45,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 00:28:45,315 INFO L130 PetriNetUnfolder]: 7/29 cut-off events. [2023-08-31 00:28:45,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:28:45,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:45,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:28:45,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:28:45,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 733617857, now seen corresponding path program 1 times [2023-08-31 00:28:45,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:45,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399116241] [2023-08-31 00:28:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:45,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:45,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399116241] [2023-08-31 00:28:45,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399116241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:28:45,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:28:45,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:28:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892432790] [2023-08-31 00:28:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:28:45,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:28:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:28:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:28:45,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 367 [2023-08-31 00:28:45,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:45,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:45,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 367 [2023-08-31 00:28:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:45,808 INFO L130 PetriNetUnfolder]: 274/651 cut-off events. [2023-08-31 00:28:45,809 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:28:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3505 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-08-31 00:28:45,817 INFO L137 encePairwiseOnDemand]: 342/367 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-31 00:28:45,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 225 flow [2023-08-31 00:28:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:28:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:28:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-31 00:28:45,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367847411444142 [2023-08-31 00:28:45,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-31 00:28:45,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-31 00:28:45,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:45,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-31 00:28:45,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:45,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:45,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:45,855 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 133 flow. Second operand 3 states and 591 transitions. [2023-08-31 00:28:45,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 225 flow [2023-08-31 00:28:45,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:28:45,860 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 97 flow [2023-08-31 00:28:45,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-31 00:28:45,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-31 00:28:45,864 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 97 flow [2023-08-31 00:28:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:45,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:45,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:28:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:28:45,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:28:45,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1260636167, now seen corresponding path program 1 times [2023-08-31 00:28:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302616391] [2023-08-31 00:28:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:45,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:28:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:45,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:28:45,958 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:28:45,962 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-31 00:28:45,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-31 00:28:45,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-31 00:28:45,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-31 00:28:45,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:28:45,968 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:28:45,972 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:28:45,973 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:28:46,008 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:28:46,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-31 00:28:46,062 INFO L130 PetriNetUnfolder]: 72/424 cut-off events. [2023-08-31 00:28:46,062 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:28:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-31 00:28:46,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-31 00:28:46,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-31 00:28:46,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:28:46,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-31 00:28:46,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-31 00:28:46,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-31 00:28:46,105 INFO L130 PetriNetUnfolder]: 71/422 cut-off events. [2023-08-31 00:28:46,105 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:28:46,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-31 00:28:46,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-31 00:28:51,764 INFO L134 LiptonReduction]: Checked pairs total: 57220 [2023-08-31 00:28:51,765 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-31 00:28:51,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:28:51,767 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;@7ad7d2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:28:51,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:28:51,769 INFO L130 PetriNetUnfolder]: 6/21 cut-off events. [2023-08-31 00:28:51,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:28:51,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:51,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:28:51,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:28:51,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1234424057, now seen corresponding path program 1 times [2023-08-31 00:28:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360854899] [2023-08-31 00:28:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:51,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:51,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360854899] [2023-08-31 00:28:51,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360854899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:28:51,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:28:51,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:28:51,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787333438] [2023-08-31 00:28:51,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:28:51,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:28:51,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:28:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:28:51,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 466 [2023-08-31 00:28:51,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:51,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:51,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 466 [2023-08-31 00:28:51,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:52,658 INFO L130 PetriNetUnfolder]: 8903/13936 cut-off events. [2023-08-31 00:28:52,658 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-08-31 00:28:52,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26898 conditions, 13936 events. 8903/13936 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93141 event pairs, 6020 based on Foata normal form. 3325/15003 useless extension candidates. Maximal degree in co-relation 11579. Up to 12844 conditions per place. [2023-08-31 00:28:52,707 INFO L137 encePairwiseOnDemand]: 432/466 looper letters, 66 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-31 00:28:52,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 320 flow [2023-08-31 00:28:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:28:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:28:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-31 00:28:52,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379113018597997 [2023-08-31 00:28:52,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-31 00:28:52,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-31 00:28:52,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:52,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-31 00:28:52,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:52,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:52,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:52,715 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 3 states and 752 transitions. [2023-08-31 00:28:52,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 320 flow [2023-08-31 00:28:52,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:28:52,719 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 164 flow [2023-08-31 00:28:52,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-31 00:28:52,720 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-31 00:28:52,720 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 164 flow [2023-08-31 00:28:52,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:52,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:52,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:52,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:28:52,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:28:52,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash 705268624, now seen corresponding path program 1 times [2023-08-31 00:28:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:52,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523237089] [2023-08-31 00:28:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:52,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523237089] [2023-08-31 00:28:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523237089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:28:53,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:28:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:28:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936498971] [2023-08-31 00:28:53,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:28:53,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:28:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:28:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:28:53,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 466 [2023-08-31 00:28:53,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:53,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:53,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 466 [2023-08-31 00:28:53,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:54,161 INFO L130 PetriNetUnfolder]: 10882/17631 cut-off events. [2023-08-31 00:28:54,161 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-08-31 00:28:54,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35061 conditions, 17631 events. 10882/17631 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 128419 event pairs, 3228 based on Foata normal form. 0/15427 useless extension candidates. Maximal degree in co-relation 34953. Up to 10910 conditions per place. [2023-08-31 00:28:54,208 INFO L137 encePairwiseOnDemand]: 453/466 looper letters, 114 selfloop transitions, 13 changer transitions 8/150 dead transitions. [2023-08-31 00:28:54,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-08-31 00:28:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 00:28:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 00:28:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 961 transitions. [2023-08-31 00:28:54,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155579399141631 [2023-08-31 00:28:54,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 961 transitions. [2023-08-31 00:28:54,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 961 transitions. [2023-08-31 00:28:54,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:54,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 961 transitions. [2023-08-31 00:28:54,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.25) internal successors, (961), 4 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:54,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:54,218 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:54,219 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 164 flow. Second operand 4 states and 961 transitions. [2023-08-31 00:28:54,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-08-31 00:28:54,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:28:54,223 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 268 flow [2023-08-31 00:28:54,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-08-31 00:28:54,227 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-31 00:28:54,227 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 268 flow [2023-08-31 00:28:54,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:54,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:54,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:54,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:28:54,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:28:54,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2087176397, now seen corresponding path program 1 times [2023-08-31 00:28:54,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:54,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021843520] [2023-08-31 00:28:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:54,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:54,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021843520] [2023-08-31 00:28:54,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021843520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:28:54,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219687493] [2023-08-31 00:28:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:54,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:28:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:28:54,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:28:54,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:28:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:28:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:28:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:54,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:28:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219687493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:28:54,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:28:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:28:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218170793] [2023-08-31 00:28:54,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:28:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:28:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:28:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:28:55,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 466 [2023-08-31 00:28:55,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:55,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:55,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 466 [2023-08-31 00:28:55,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:55,182 INFO L130 PetriNetUnfolder]: 1325/2516 cut-off events. [2023-08-31 00:28:55,182 INFO L131 PetriNetUnfolder]: For 1094/1094 co-relation queries the response was YES. [2023-08-31 00:28:55,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6395 conditions, 2516 events. 1325/2516 cut-off events. For 1094/1094 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16013 event pairs, 34 based on Foata normal form. 296/2716 useless extension candidates. Maximal degree in co-relation 2424. Up to 1598 conditions per place. [2023-08-31 00:28:55,193 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 89 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-08-31 00:28:55,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 101 transitions, 514 flow [2023-08-31 00:28:55,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:28:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:28:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1146 transitions. [2023-08-31 00:28:55,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918454935622318 [2023-08-31 00:28:55,195 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1146 transitions. [2023-08-31 00:28:55,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1146 transitions. [2023-08-31 00:28:55,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:55,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1146 transitions. [2023-08-31 00:28:55,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.2) internal successors, (1146), 5 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:55,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:55,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:55,202 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 268 flow. Second operand 5 states and 1146 transitions. [2023-08-31 00:28:55,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 101 transitions, 514 flow [2023-08-31 00:28:55,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 101 transitions, 512 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 00:28:55,207 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2023-08-31 00:28:55,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-31 00:28:55,208 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-31 00:28:55,208 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2023-08-31 00:28:55,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:28:55,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:55,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:28:55,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:28:55,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:28:55,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:28:55,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:55,415 INFO L85 PathProgramCache]: Analyzing trace with hash -147922955, now seen corresponding path program 1 times [2023-08-31 00:28:55,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:55,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855656660] [2023-08-31 00:28:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:55,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:55,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:28:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:55,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:28:55,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:28:55,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:28:55,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:28:55,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-31 00:28:55,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:28:55,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:28:55,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:28:55,450 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-31 00:28:55,451 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:28:55,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:28:55,470 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:28:55,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 319 transitions, 668 flow [2023-08-31 00:28:55,519 INFO L130 PetriNetUnfolder]: 106/608 cut-off events. [2023-08-31 00:28:55,519 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:28:55,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 608 events. 106/608 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2559 event pairs, 1 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-08-31 00:28:55,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 319 transitions, 668 flow [2023-08-31 00:28:55,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 317 transitions, 664 flow [2023-08-31 00:28:55,528 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:28:55,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-31 00:28:55,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-31 00:28:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 317 transitions, 664 flow [2023-08-31 00:28:55,578 INFO L130 PetriNetUnfolder]: 105/606 cut-off events. [2023-08-31 00:28:55,579 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:28:55,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 606 events. 105/606 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2552 event pairs, 1 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 430. Up to 16 conditions per place. [2023-08-31 00:28:55,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 47880 [2023-08-31 00:29:00,227 INFO L134 LiptonReduction]: Checked pairs total: 102219 [2023-08-31 00:29:00,228 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-08-31 00:29:00,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:29:00,230 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;@7ad7d2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:29:00,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:29:00,231 INFO L130 PetriNetUnfolder]: 6/23 cut-off events. [2023-08-31 00:29:00,248 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:29:00,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:00,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:29:00,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:29:00,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1826810000, now seen corresponding path program 1 times [2023-08-31 00:29:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:00,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050769120] [2023-08-31 00:29:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:29:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050769120] [2023-08-31 00:29:00,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050769120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:29:00,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:29:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:29:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030840172] [2023-08-31 00:29:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:29:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:29:00,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:29:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:29:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:29:00,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 562 [2023-08-31 00:29:00,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:00,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:29:00,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 562 [2023-08-31 00:29:00,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:29:13,824 INFO L130 PetriNetUnfolder]: 187412/264945 cut-off events. [2023-08-31 00:29:13,824 INFO L131 PetriNetUnfolder]: For 3117/3117 co-relation queries the response was YES. [2023-08-31 00:29:14,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511892 conditions, 264945 events. 187412/264945 cut-off events. For 3117/3117 co-relation queries the response was YES. Maximal size of possible extension queue 7417. Compared 2100407 event pairs, 115799 based on Foata normal form. 66267/288059 useless extension candidates. Maximal degree in co-relation 25647. Up to 244876 conditions per place. [2023-08-31 00:29:15,213 INFO L137 encePairwiseOnDemand]: 518/562 looper letters, 82 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-31 00:29:15,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 406 flow [2023-08-31 00:29:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:29:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:29:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-31 00:29:15,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415183867141162 [2023-08-31 00:29:15,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-31 00:29:15,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-31 00:29:15,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:29:15,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-31 00:29:15,219 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) [2023-08-31 00:29:15,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:15,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:15,223 INFO L175 Difference]: Start difference. First operand has 87 places, 128 transitions, 286 flow. Second operand 3 states and 913 transitions. [2023-08-31 00:29:15,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 406 flow [2023-08-31 00:29:15,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:29:15,227 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2023-08-31 00:29:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-08-31 00:29:15,228 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-31 00:29:15,229 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2023-08-31 00:29:15,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:15,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:15,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:29:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 00:29:15,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:29:15,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1853768516, now seen corresponding path program 1 times [2023-08-31 00:29:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315919482] [2023-08-31 00:29:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:29:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315919482] [2023-08-31 00:29:15,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315919482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:29:15,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:29:15,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:29:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40746934] [2023-08-31 00:29:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:29:15,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:29:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:29:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:29:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:29:15,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 562 [2023-08-31 00:29:15,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:15,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:29:15,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 562 [2023-08-31 00:29:15,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:29:34,268 INFO L130 PetriNetUnfolder]: 259497/368253 cut-off events. [2023-08-31 00:29:34,269 INFO L131 PetriNetUnfolder]: For 14424/14424 co-relation queries the response was YES. [2023-08-31 00:29:34,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731261 conditions, 368253 events. 259497/368253 cut-off events. For 14424/14424 co-relation queries the response was YES. Maximal size of possible extension queue 11487. Compared 3044964 event pairs, 61747 based on Foata normal form. 0/323625 useless extension candidates. Maximal degree in co-relation 731147. Up to 223693 conditions per place. [2023-08-31 00:29:35,731 INFO L137 encePairwiseOnDemand]: 545/562 looper letters, 157 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2023-08-31 00:29:35,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 195 transitions, 828 flow [2023-08-31 00:29:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 00:29:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 00:29:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1175 transitions. [2023-08-31 00:29:35,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226868327402135 [2023-08-31 00:29:35,735 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1175 transitions. [2023-08-31 00:29:35,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1175 transitions. [2023-08-31 00:29:35,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:29:35,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1175 transitions. [2023-08-31 00:29:35,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.75) internal successors, (1175), 4 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:35,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:35,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:35,740 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 4 states and 1175 transitions. [2023-08-31 00:29:35,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 195 transitions, 828 flow [2023-08-31 00:29:35,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:29:35,746 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 358 flow [2023-08-31 00:29:35,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2023-08-31 00:29:35,746 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2023-08-31 00:29:35,747 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 358 flow [2023-08-31 00:29:35,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:35,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:35,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:29:35,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:29:35,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:29:35,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1382282695, now seen corresponding path program 1 times [2023-08-31 00:29:35,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:35,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998709251] [2023-08-31 00:29:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:35,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:29:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998709251] [2023-08-31 00:29:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998709251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:29:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160917281] [2023-08-31 00:29:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:35,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:29:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:29:35,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:29:35,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:29:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:29:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:29:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:36,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:29:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160917281] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:29:36,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:29:36,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:29:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213318147] [2023-08-31 00:29:36,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:29:36,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:29:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:29:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:29:36,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:29:36,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 562 [2023-08-31 00:29:36,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:36,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:29:36,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 562 [2023-08-31 00:29:36,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:29:38,883 INFO L130 PetriNetUnfolder]: 34569/53460 cut-off events. [2023-08-31 00:29:38,883 INFO L131 PetriNetUnfolder]: For 31009/31009 co-relation queries the response was YES. [2023-08-31 00:29:38,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137769 conditions, 53460 events. 34569/53460 cut-off events. For 31009/31009 co-relation queries the response was YES. Maximal size of possible extension queue 2171. Compared 422777 event pairs, 1098 based on Foata normal form. 4795/55809 useless extension candidates. Maximal degree in co-relation 38669. Up to 33981 conditions per place. [2023-08-31 00:29:39,132 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 165 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2023-08-31 00:29:39,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 183 transitions, 961 flow [2023-08-31 00:29:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:29:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:29:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1688 transitions. [2023-08-31 00:29:39,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005931198102017 [2023-08-31 00:29:39,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1688 transitions. [2023-08-31 00:29:39,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1688 transitions. [2023-08-31 00:29:39,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:29:39,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1688 transitions. [2023-08-31 00:29:39,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 281.3333333333333) internal successors, (1688), 6 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:39,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:39,146 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:39,146 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 358 flow. Second operand 6 states and 1688 transitions. [2023-08-31 00:29:39,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 183 transitions, 961 flow [2023-08-31 00:29:39,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 183 transitions, 955 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-31 00:29:39,164 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 273 flow [2023-08-31 00:29:39,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2023-08-31 00:29:39,165 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-31 00:29:39,165 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 273 flow [2023-08-31 00:29:39,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:39,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:39,166 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:29:39,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:29:39,370 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,SelfDestructingSolverStorable8 [2023-08-31 00:29:39,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:29:39,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash -943329716, now seen corresponding path program 1 times [2023-08-31 00:29:39,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:39,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027198394] [2023-08-31 00:29:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:39,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:29:39,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:29:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:29:39,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:29:39,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:29:39,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-31 00:29:39,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-31 00:29:39,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-31 00:29:39,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 00:29:39,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 00:29:39,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 00:29:39,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 00:29:39,407 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-31 00:29:39,408 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:29:39,408 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:29:39,429 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:29:39,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 378 transitions, 800 flow [2023-08-31 00:29:39,497 INFO L130 PetriNetUnfolder]: 152/856 cut-off events. [2023-08-31 00:29:39,498 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:29:39,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 856 events. 152/856 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3889 event pairs, 6 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-31 00:29:39,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 378 transitions, 800 flow [2023-08-31 00:29:39,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 376 transitions, 796 flow [2023-08-31 00:29:39,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:29:39,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 376 transitions, 796 flow [2023-08-31 00:29:39,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 376 transitions, 796 flow [2023-08-31 00:29:39,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 376 transitions, 796 flow [2023-08-31 00:29:39,578 INFO L130 PetriNetUnfolder]: 151/854 cut-off events. [2023-08-31 00:29:39,578 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:29:39,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 854 events. 151/854 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3888 event pairs, 6 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 626. Up to 32 conditions per place. [2023-08-31 00:29:39,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 77520 [2023-08-31 00:29:44,820 INFO L134 LiptonReduction]: Checked pairs total: 171843 [2023-08-31 00:29:44,820 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-31 00:29:44,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:29:44,822 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;@7ad7d2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:29:44,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:29:44,823 INFO L130 PetriNetUnfolder]: 6/23 cut-off events. [2023-08-31 00:29:44,823 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:29:44,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:44,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:29:44,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 00:29:44,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1771787102, now seen corresponding path program 1 times [2023-08-31 00:29:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:44,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051093022] [2023-08-31 00:29:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:44,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:29:44,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051093022] [2023-08-31 00:29:44,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051093022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:29:44,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:29:44,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:29:44,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393653613] [2023-08-31 00:29:44,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:29:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:29:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:29:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:29:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:29:44,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 671 [2023-08-31 00:29:44,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 162 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:44,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:29:44,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 671 [2023-08-31 00:29:44,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand