./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/03_incdec.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/pthread-ext/03_incdec.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 c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --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 [2023-08-30 22:52:23,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:52:23,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:52:23,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:52:23,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:52:23,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:52:23,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:52:23,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:52:23,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:52:23,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:52:23,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:52:23,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:52:23,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:52:23,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:52:23,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:52:23,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:52:23,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:52:23,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:52:23,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:52:23,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:52:23,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:52:23,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:52:23,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:52:23,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:52:23,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:52:23,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:52:23,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:52:23,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:52:23,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:52:23,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:52:23,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:52:23,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:52:23,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:52:23,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:52:23,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:52:23,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:52:23,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:52:23,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:52:23,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:52:23,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:52:23,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:52:23,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:52:23,959 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:52:23,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:52:23,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:52:23,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:52:23,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:52:23,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:52:23,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:52:23,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:52:23,962 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:52:23,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:52:23,962 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:52:23,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:52:23,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:52:23,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:52:23,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:52:23,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:52:23,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:52:23,964 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:52:23,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:52:23,964 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:52:23,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:52:23,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:52:23,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:52:23,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:52:23,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:52:23,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:52:23,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:52:23,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:52:23,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:52:23,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:52:23,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:52:23,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:52:23,967 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:52:23,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:52:23,967 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:52:23,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:52:24,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:52:24,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:52:24,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:52:24,318 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:52:24,319 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:52:24,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-30 22:52:25,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:52:25,781 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:52:25,782 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-30 22:52:25,791 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7ab15ed7/04011dab8da14e60a4056e9e8f9fa10a/FLAG7530c3238 [2023-08-30 22:52:25,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7ab15ed7/04011dab8da14e60a4056e9e8f9fa10a [2023-08-30 22:52:25,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:52:25,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:52:25,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:52:25,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:52:25,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:52:25,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:52:25" (1/1) ... [2023-08-30 22:52:25,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290c5403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:25, skipping insertion in model container [2023-08-30 22:52:25,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:52:25" (1/1) ... [2023-08-30 22:52:25,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:52:25,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:52:26,093 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30534,30547] [2023-08-30 22:52:26,108 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30928,30941] [2023-08-30 22:52:26,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:52:26,128 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:52:26,180 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30534,30547] [2023-08-30 22:52:26,187 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30928,30941] [2023-08-30 22:52:26,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:52:26,228 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:52:26,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26 WrapperNode [2023-08-30 22:52:26,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:52:26,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:52:26,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:52:26,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:52:26,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,294 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 134 [2023-08-30 22:52:26,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:52:26,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:52:26,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:52:26,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:52:26,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,337 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:52:26,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:52:26,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:52:26,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:52:26,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (1/1) ... [2023-08-30 22:52:26,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:52:26,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:52:26,382 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) [2023-08-30 22:52:26,408 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 [2023-08-30 22:52:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:52:26,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:52:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:52:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:52:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:52:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:52:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:52:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:52:26,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:52:26,424 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:52:26,591 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:52:26,593 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:52:26,777 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:52:26,901 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:52:26,901 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 22:52:26,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:26 BoogieIcfgContainer [2023-08-30 22:52:26,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:52:26,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:52:26,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:52:26,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:52:26,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:52:25" (1/3) ... [2023-08-30 22:52:26,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bf04c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:52:26, skipping insertion in model container [2023-08-30 22:52:26,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:26" (2/3) ... [2023-08-30 22:52:26,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bf04c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:52:26, skipping insertion in model container [2023-08-30 22:52:26,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:26" (3/3) ... [2023-08-30 22:52:26,908 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-08-30 22:52:26,913 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:52:26,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:52:26,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 22:52:26,921 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:52:26,964 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:26,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 167 flow [2023-08-30 22:52:27,023 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2023-08-30 22:52:27,024 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:27,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-08-30 22:52:27,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 81 transitions, 167 flow [2023-08-30 22:52:27,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 81 transitions, 167 flow [2023-08-30 22:52:27,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:27,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 167 flow [2023-08-30 22:52:27,050 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 167 flow [2023-08-30 22:52:27,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 167 flow [2023-08-30 22:52:27,080 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2023-08-30 22:52:27,081 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:27,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-08-30 22:52:27,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 1378 [2023-08-30 22:52:31,648 INFO L134 LiptonReduction]: Checked pairs total: 1359 [2023-08-30 22:52:31,648 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-30 22:52:31,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:31,679 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;@6612974, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:31,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:52:31,684 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 22:52:31,684 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:31,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:31,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:52:31,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:52:31,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 17159279, now seen corresponding path program 1 times [2023-08-30 22:52:31,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:31,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025398027] [2023-08-30 22:52:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:31,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:31,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025398027] [2023-08-30 22:52:31,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025398027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:31,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:52:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067882869] [2023-08-30 22:52:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:52:31,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:52:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:52:31,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 186 [2023-08-30 22:52:31,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 23 flow. Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 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) [2023-08-30 22:52:31,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:31,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 186 [2023-08-30 22:52:31,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:31,925 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 22:52:31,925 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:31,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 22:52:31,927 INFO L137 encePairwiseOnDemand]: 183/186 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-30 22:52:31,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 22:52:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:52:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:52:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2023-08-30 22:52:31,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2023-08-30 22:52:31,941 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 136 transitions. [2023-08-30 22:52:31,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 136 transitions. [2023-08-30 22:52:31,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:31,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 136 transitions. [2023-08-30 22:52:31,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 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) [2023-08-30 22:52:31,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-08-30 22:52:31,953 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-08-30 22:52:31,954 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 23 flow. Second operand 2 states and 136 transitions. [2023-08-30 22:52:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 22:52:31,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:31,958 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-30 22:52:31,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-30 22:52:31,963 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-08-30 22:52:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-30 22:52:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 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) [2023-08-30 22:52:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:31,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:52:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:52:31,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:52:31,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -689861676, now seen corresponding path program 1 times [2023-08-30 22:52:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184136612] [2023-08-30 22:52:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:31,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:32,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:32,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:32,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:32,038 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:52:32,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:52:32,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:52:32,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:52:32,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:52:32,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:52:32,040 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:52:32,042 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:52:32,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:52:32,065 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:32,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 135 transitions, 282 flow [2023-08-30 22:52:32,095 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2023-08-30 22:52:32,096 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:52:32,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-08-30 22:52:32,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 135 transitions, 282 flow [2023-08-30 22:52:32,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 135 transitions, 282 flow [2023-08-30 22:52:32,099 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:32,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 135 transitions, 282 flow [2023-08-30 22:52:32,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 135 transitions, 282 flow [2023-08-30 22:52:32,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 135 transitions, 282 flow [2023-08-30 22:52:32,128 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2023-08-30 22:52:32,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:52:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-08-30 22:52:32,137 INFO L119 LiptonReduction]: Number of co-enabled transitions 8480 [2023-08-30 22:52:34,386 INFO L134 LiptonReduction]: Checked pairs total: 31412 [2023-08-30 22:52:34,386 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-30 22:52:34,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:34,389 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;@6612974, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:34,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 22:52:34,395 INFO L130 PetriNetUnfolder]: 3/43 cut-off events. [2023-08-30 22:52:34,395 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:52:34,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:34,395 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:52:34,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:52:34,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash 896775523, now seen corresponding path program 1 times [2023-08-30 22:52:34,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:34,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606393621] [2023-08-30 22:52:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:34,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:34,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:34,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:34,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 22:52:34,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 22:52:34,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 22:52:34,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 22:52:34,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 22:52:34,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 22:52:34,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 22:52:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:52:34,430 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 22:52:34,430 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:52:34,431 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:52:34,459 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 399 flow [2023-08-30 22:52:34,506 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-08-30 22:52:34,506 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:52:34,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 223 events. 19/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 789 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-30 22:52:34,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 399 flow [2023-08-30 22:52:34,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 189 transitions, 399 flow [2023-08-30 22:52:34,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:34,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 189 transitions, 399 flow [2023-08-30 22:52:34,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 189 transitions, 399 flow [2023-08-30 22:52:34,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 399 flow [2023-08-30 22:52:34,536 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-08-30 22:52:34,537 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:52:34,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 223 events. 19/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 789 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-30 22:52:34,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 21306 [2023-08-30 22:52:37,583 INFO L134 LiptonReduction]: Checked pairs total: 84912 [2023-08-30 22:52:37,584 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-30 22:52:37,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:37,586 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;@6612974, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:37,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 22:52:37,591 INFO L130 PetriNetUnfolder]: 5/50 cut-off events. [2023-08-30 22:52:37,591 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 22:52:37,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:37,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:37,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:52:37,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash 172841002, now seen corresponding path program 1 times [2023-08-30 22:52:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:37,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294200033] [2023-08-30 22:52:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:37,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:37,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294200033] [2023-08-30 22:52:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294200033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:37,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:37,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001228463] [2023-08-30 22:52:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:38,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 339 [2023-08-30 22:52:38,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 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) [2023-08-30 22:52:38,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:38,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 339 [2023-08-30 22:52:38,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:41,024 INFO L130 PetriNetUnfolder]: 21127/32305 cut-off events. [2023-08-30 22:52:41,024 INFO L131 PetriNetUnfolder]: For 1330/1330 co-relation queries the response was YES. [2023-08-30 22:52:41,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62893 conditions, 32305 events. 21127/32305 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 1899. Compared 251827 event pairs, 6773 based on Foata normal form. 550/30212 useless extension candidates. Maximal degree in co-relation 23795. Up to 13463 conditions per place. [2023-08-30 22:52:41,235 INFO L137 encePairwiseOnDemand]: 316/339 looper letters, 156 selfloop transitions, 14 changer transitions 0/192 dead transitions. [2023-08-30 22:52:41,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 192 transitions, 783 flow [2023-08-30 22:52:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 933 transitions. [2023-08-30 22:52:41,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870206489675514 [2023-08-30 22:52:41,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 933 transitions. [2023-08-30 22:52:41,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 933 transitions. [2023-08-30 22:52:41,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:41,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 933 transitions. [2023-08-30 22:52:41,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 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) [2023-08-30 22:52:41,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 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) [2023-08-30 22:52:41,251 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 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) [2023-08-30 22:52:41,251 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 203 flow. Second operand 6 states and 933 transitions. [2023-08-30 22:52:41,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 192 transitions, 783 flow [2023-08-30 22:52:41,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 192 transitions, 769 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:41,257 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 296 flow [2023-08-30 22:52:41,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2023-08-30 22:52:41,258 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2023-08-30 22:52:41,259 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 296 flow [2023-08-30 22:52:41,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 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) [2023-08-30 22:52:41,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:41,259 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:52:41,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:52:41,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:52:41,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1731754208, now seen corresponding path program 1 times [2023-08-30 22:52:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:41,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406829423] [2023-08-30 22:52:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:41,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:41,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:41,283 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:41,283 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 22:52:41,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-30 22:52:41,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-30 22:52:41,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-30 22:52:41,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-30 22:52:41,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-30 22:52:41,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-30 22:52:41,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-30 22:52:41,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-30 22:52:41,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:52:41,285 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:52:41,286 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:52:41,286 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:52:41,318 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:41,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 243 transitions, 518 flow [2023-08-30 22:52:41,353 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-08-30 22:52:41,353 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:52:41,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 289 events. 25/289 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1114 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-08-30 22:52:41,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 243 transitions, 518 flow [2023-08-30 22:52:41,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 243 transitions, 518 flow [2023-08-30 22:52:41,359 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:41,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 243 transitions, 518 flow [2023-08-30 22:52:41,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 243 transitions, 518 flow [2023-08-30 22:52:41,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 243 transitions, 518 flow [2023-08-30 22:52:41,388 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-08-30 22:52:41,388 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:52:41,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 289 events. 25/289 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1114 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-08-30 22:52:41,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 39856 [2023-08-30 22:52:45,448 INFO L134 LiptonReduction]: Checked pairs total: 161119 [2023-08-30 22:52:45,449 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-30 22:52:45,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:45,451 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;@6612974, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:45,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 22:52:45,455 INFO L130 PetriNetUnfolder]: 5/50 cut-off events. [2023-08-30 22:52:45,456 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 22:52:45,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:45,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:45,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-08-30 22:52:45,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash 523117123, now seen corresponding path program 1 times [2023-08-30 22:52:45,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361807323] [2023-08-30 22:52:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:45,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361807323] [2023-08-30 22:52:45,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361807323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:45,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771653649] [2023-08-30 22:52:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:45,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 432 [2023-08-30 22:52:45,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 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) [2023-08-30 22:52:45,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:45,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 432 [2023-08-30 22:52:45,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:39,150 INFO L130 PetriNetUnfolder]: 614509/844867 cut-off events. [2023-08-30 22:53:39,151 INFO L131 PetriNetUnfolder]: For 47824/47824 co-relation queries the response was YES. [2023-08-30 22:53:41,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651566 conditions, 844867 events. 614509/844867 cut-off events. For 47824/47824 co-relation queries the response was YES. Maximal size of possible extension queue 35127. Compared 7353824 event pairs, 226467 based on Foata normal form. 32726/776595 useless extension candidates. Maximal degree in co-relation 274659. Up to 389759 conditions per place. [2023-08-30 22:53:44,890 INFO L137 encePairwiseOnDemand]: 401/432 looper letters, 219 selfloop transitions, 18 changer transitions 0/267 dead transitions. [2023-08-30 22:53:44,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 267 transitions, 1114 flow [2023-08-30 22:53:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:53:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:53:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1215 transitions. [2023-08-30 22:53:44,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-30 22:53:44,894 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1215 transitions. [2023-08-30 22:53:44,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1215 transitions. [2023-08-30 22:53:44,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:44,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1215 transitions. [2023-08-30 22:53:44,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.5) internal successors, (1215), 6 states have internal predecessors, (1215), 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) [2023-08-30 22:53:44,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 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) [2023-08-30 22:53:44,903 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 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) [2023-08-30 22:53:44,903 INFO L175 Difference]: Start difference. First operand has 110 places, 120 transitions, 272 flow. Second operand 6 states and 1215 transitions. [2023-08-30 22:53:44,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 267 transitions, 1114 flow [2023-08-30 22:53:45,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 267 transitions, 1078 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-08-30 22:53:45,010 INFO L231 Difference]: Finished difference. Result has 113 places, 126 transitions, 398 flow [2023-08-30 22:53:45,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=113, PETRI_TRANSITIONS=126} [2023-08-30 22:53:45,013 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 3 predicate places. [2023-08-30 22:53:45,013 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 126 transitions, 398 flow [2023-08-30 22:53:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 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) [2023-08-30 22:53:45,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:45,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:45,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:53:45,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-08-30 22:53:45,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1920470189, now seen corresponding path program 1 times [2023-08-30 22:53:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464425911] [2023-08-30 22:53:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:45,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:45,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464425911] [2023-08-30 22:53:45,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464425911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:53:45,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:53:45,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:53:45,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437209382] [2023-08-30 22:53:45,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:53:45,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:53:45,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:53:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:53:45,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 432 [2023-08-30 22:53:45,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 126 transitions, 398 flow. Second operand has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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) [2023-08-30 22:53:45,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:45,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 432 [2023-08-30 22:53:45,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:55:19,651 INFO L130 PetriNetUnfolder]: 867965/1208760 cut-off events. [2023-08-30 22:55:19,652 INFO L131 PetriNetUnfolder]: For 418667/442175 co-relation queries the response was YES. [2023-08-30 22:55:23,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669782 conditions, 1208760 events. 867965/1208760 cut-off events. For 418667/442175 co-relation queries the response was YES. Maximal size of possible extension queue 51465. Compared 11265909 event pairs, 336865 based on Foata normal form. 17630/1145759 useless extension candidates. Maximal degree in co-relation 1816783. Up to 569958 conditions per place. [2023-08-30 22:55:28,682 INFO L137 encePairwiseOnDemand]: 418/432 looper letters, 233 selfloop transitions, 28 changer transitions 0/293 dead transitions. [2023-08-30 22:55:28,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 293 transitions, 1445 flow [2023-08-30 22:55:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:55:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:55:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1174 transitions. [2023-08-30 22:55:28,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529320987654321 [2023-08-30 22:55:28,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1174 transitions. [2023-08-30 22:55:28,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1174 transitions. [2023-08-30 22:55:28,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:55:28,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1174 transitions. [2023-08-30 22:55:28,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.66666666666666) internal successors, (1174), 6 states have internal predecessors, (1174), 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) [2023-08-30 22:55:28,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 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) [2023-08-30 22:55:28,722 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 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) [2023-08-30 22:55:28,722 INFO L175 Difference]: Start difference. First operand has 113 places, 126 transitions, 398 flow. Second operand 6 states and 1174 transitions. [2023-08-30 22:55:28,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 293 transitions, 1445 flow [2023-08-30 22:55:39,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 293 transitions, 1445 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:55:39,746 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 603 flow [2023-08-30 22:55:39,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2023-08-30 22:55:39,747 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2023-08-30 22:55:39,747 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 603 flow [2023-08-30 22:55:39,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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) [2023-08-30 22:55:39,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:55:39,748 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 22:55:39,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:55:39,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-08-30 22:55:39,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:55:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2014054127, now seen corresponding path program 1 times [2023-08-30 22:55:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:55:39,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431916313] [2023-08-30 22:55:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:55:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:55:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:55:39,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:55:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:55:39,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:55:39,806 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:55:39,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 22:55:39,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2023-08-30 22:55:39,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2023-08-30 22:55:39,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 11 remaining) [2023-08-30 22:55:39,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2023-08-30 22:55:39,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 11 remaining) [2023-08-30 22:55:39,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2023-08-30 22:55:39,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2023-08-30 22:55:39,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2023-08-30 22:55:39,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2023-08-30 22:55:39,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2023-08-30 22:55:39,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:55:39,809 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:55:39,809 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:55:39,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 22:55:39,872 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:55:39,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 297 transitions, 639 flow [2023-08-30 22:55:39,946 INFO L130 PetriNetUnfolder]: 31/355 cut-off events. [2023-08-30 22:55:39,946 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:55:39,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 355 events. 31/355 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1415 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 302. Up to 12 conditions per place. [2023-08-30 22:55:39,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 297 transitions, 639 flow [2023-08-30 22:55:39,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 297 transitions, 639 flow [2023-08-30 22:55:39,954 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:55:39,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 297 transitions, 639 flow [2023-08-30 22:55:39,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 297 transitions, 639 flow [2023-08-30 22:55:39,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 297 transitions, 639 flow [2023-08-30 22:55:40,001 INFO L130 PetriNetUnfolder]: 31/355 cut-off events. [2023-08-30 22:55:40,002 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:55:40,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 355 events. 31/355 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1415 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 302. Up to 12 conditions per place. [2023-08-30 22:55:40,025 INFO L119 LiptonReduction]: Number of co-enabled transitions 64130 [2023-08-30 22:55:45,361 INFO L134 LiptonReduction]: Checked pairs total: 272528 [2023-08-30 22:55:45,362 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-08-30 22:55:45,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:55:45,369 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;@6612974, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:55:45,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-30 22:55:45,373 INFO L130 PetriNetUnfolder]: 5/50 cut-off events. [2023-08-30 22:55:45,373 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 22:55:45,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:55:45,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:55:45,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2023-08-30 22:55:45,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:55:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1898731216, now seen corresponding path program 1 times [2023-08-30 22:55:45,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:55:45,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707144125] [2023-08-30 22:55:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:55:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:55:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:55:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:55:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:55:45,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707144125] [2023-08-30 22:55:45,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707144125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:55:45,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:55:45,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:55:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137418008] [2023-08-30 22:55:45,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:55:45,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:55:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:55:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:55:45,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:55:45,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 532 [2023-08-30 22:55:45,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 151 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 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) [2023-08-30 22:55:45,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:55:45,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 532 [2023-08-30 22:55:45,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand