./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/weaver/popl20-prod-cons3.wvr.c -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 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:22:02,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:22:02,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:22:02,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:22:02,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:22:02,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:22:02,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:22:02,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:22:02,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:22:02,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:22:02,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:22:02,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:22:02,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:22:02,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:22:02,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:22:02,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:22:02,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:22:02,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:22:02,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:22:02,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:22:02,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:22:02,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:22:02,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:22:02,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:22:02,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:22:02,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:22:02,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:22:02,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:22:02,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:22:02,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:22:02,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:22:02,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:22:02,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:22:02,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:22:02,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:22:02,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:22:02,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:22:02,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:22:02,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:22:02,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:22:02,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:22:02,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:22:02,957 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:22:02,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:22:02,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:22:02,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:22:02,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:22:02,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:22:02,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:22:02,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:22:02,961 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:22:02,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:22:02,962 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:22:02,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:22:02,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:22:02,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:22:02,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:22:02,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:22:02,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:22:02,963 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:22:02,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:22:02,963 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:22:02,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:22:02,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:22:02,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:22:02,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:22:02,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:22:02,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:22:02,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:22:02,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:22:02,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:22:02,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:22:02,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:22:02,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:22:02,966 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:22:02,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:22:02,966 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:22:02,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:22:03,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:22:03,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:22:03,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:22:03,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:22:03,274 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:22:03,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-30 21:22:04,510 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:22:04,725 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:22:04,726 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-30 21:22:04,730 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81e5a19e/5b8c18f283c640918092ceb9b15721af/FLAG0354f4547 [2023-08-30 21:22:04,741 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81e5a19e/5b8c18f283c640918092ceb9b15721af [2023-08-30 21:22:04,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:22:04,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:22:04,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:22:04,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:22:04,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:22:04,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:22:04" (1/1) ... [2023-08-30 21:22:04,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d8e55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:04, skipping insertion in model container [2023-08-30 21:22:04,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:22:04" (1/1) ... [2023-08-30 21:22:04,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:22:04,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:22:04,911 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2023-08-30 21:22:04,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:22:04,933 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:22:04,984 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2023-08-30 21:22:04,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:22:04,994 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:22:04,994 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:22:05,000 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:22:05,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05 WrapperNode [2023-08-30 21:22:05,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:22:05,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:22:05,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:22:05,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:22:05,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,040 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 274 [2023-08-30 21:22:05,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:22:05,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:22:05,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:22:05,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:22:05,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,066 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:22:05,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:22:05,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:22:05,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:22:05,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (1/1) ... [2023-08-30 21:22:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:22:05,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:05,110 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 21:22:05,136 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 21:22:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:22:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:22:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:22:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:22:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:22:05,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:22:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:22:05,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:22:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:22:05,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:22:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 21:22:05,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 21:22:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:22:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:22:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:22:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:22:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:22:05,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:22:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:22:05,156 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 21:22:05,312 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:22:05,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:22:05,675 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:22:05,801 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:22:05,801 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 21:22:05,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:22:05 BoogieIcfgContainer [2023-08-30 21:22:05,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:22:05,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:22:05,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:22:05,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:22:05,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:22:04" (1/3) ... [2023-08-30 21:22:05,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1a6ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:22:05, skipping insertion in model container [2023-08-30 21:22:05,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:05" (2/3) ... [2023-08-30 21:22:05,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1a6ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:22:05, skipping insertion in model container [2023-08-30 21:22:05,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:22:05" (3/3) ... [2023-08-30 21:22:05,810 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2023-08-30 21:22:05,816 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:22:05,824 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:22:05,824 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:22:05,824 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:22:05,953 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 21:22:06,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 227 transitions, 486 flow [2023-08-30 21:22:06,144 INFO L130 PetriNetUnfolder]: 18/223 cut-off events. [2023-08-30 21:22:06,144 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:22:06,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 223 events. 18/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 191. Up to 3 conditions per place. [2023-08-30 21:22:06,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 227 transitions, 486 flow [2023-08-30 21:22:06,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 211 transitions, 446 flow [2023-08-30 21:22:06,164 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:22:06,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 211 transitions, 446 flow [2023-08-30 21:22:06,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 211 transitions, 446 flow [2023-08-30 21:22:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 211 transitions, 446 flow [2023-08-30 21:22:06,243 INFO L130 PetriNetUnfolder]: 18/211 cut-off events. [2023-08-30 21:22:06,244 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:22:06,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 211 events. 18/211 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 126 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 191. Up to 3 conditions per place. [2023-08-30 21:22:06,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 2284 [2023-08-30 21:22:13,957 INFO L134 LiptonReduction]: Checked pairs total: 4694 [2023-08-30 21:22:13,958 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-08-30 21:22:13,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:22:13,974 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73bf445e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:22:13,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 21:22:13,980 INFO L130 PetriNetUnfolder]: 5/35 cut-off events. [2023-08-30 21:22:13,981 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:22:13,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:13,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:13,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:13,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -685861163, now seen corresponding path program 1 times [2023-08-30 21:22:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076259777] [2023-08-30 21:22:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:14,455 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 21:22:14,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:14,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076259777] [2023-08-30 21:22:14,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076259777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:14,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:14,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:22:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802490117] [2023-08-30 21:22:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:14,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:14,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 438 [2023-08-30 21:22:14,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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 21:22:14,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:14,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 438 [2023-08-30 21:22:14,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:14,893 INFO L130 PetriNetUnfolder]: 1835/2622 cut-off events. [2023-08-30 21:22:14,893 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2023-08-30 21:22:14,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 2622 events. 1835/2622 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11831 event pairs, 180 based on Foata normal form. 0/2183 useless extension candidates. Maximal degree in co-relation 4539. Up to 845 conditions per place. [2023-08-30 21:22:14,910 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 76 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-30 21:22:14,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 83 transitions, 373 flow [2023-08-30 21:22:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:22:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:22:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1063 transitions. [2023-08-30 21:22:14,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853881278538813 [2023-08-30 21:22:14,926 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1063 transitions. [2023-08-30 21:22:14,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1063 transitions. [2023-08-30 21:22:14,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:14,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1063 transitions. [2023-08-30 21:22:14,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.6) internal successors, (1063), 5 states have internal predecessors, (1063), 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 21:22:14,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 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 21:22:14,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 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 21:22:14,945 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 96 flow. Second operand 5 states and 1063 transitions. [2023-08-30 21:22:14,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 83 transitions, 373 flow [2023-08-30 21:22:14,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 340 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 21:22:14,952 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 108 flow [2023-08-30 21:22:14,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-30 21:22:14,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-08-30 21:22:14,957 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 108 flow [2023-08-30 21:22:14,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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 21:22:14,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:14,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:14,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:22:14,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:14,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 528431825, now seen corresponding path program 2 times [2023-08-30 21:22:14,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:14,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564222311] [2023-08-30 21:22:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:14,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:15,074 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 21:22:15,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564222311] [2023-08-30 21:22:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564222311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:15,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:22:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926288949] [2023-08-30 21:22:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:15,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:15,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 438 [2023-08-30 21:22:15,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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 21:22:15,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:15,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 438 [2023-08-30 21:22:15,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:15,429 INFO L130 PetriNetUnfolder]: 1949/2762 cut-off events. [2023-08-30 21:22:15,429 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-08-30 21:22:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6091 conditions, 2762 events. 1949/2762 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 12734 event pairs, 198 based on Foata normal form. 0/2393 useless extension candidates. Maximal degree in co-relation 3849. Up to 1095 conditions per place. [2023-08-30 21:22:15,446 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 65 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2023-08-30 21:22:15,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 346 flow [2023-08-30 21:22:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:22:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:22:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1052 transitions. [2023-08-30 21:22:15,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480365296803653 [2023-08-30 21:22:15,450 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1052 transitions. [2023-08-30 21:22:15,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1052 transitions. [2023-08-30 21:22:15,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:15,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1052 transitions. [2023-08-30 21:22:15,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.4) internal successors, (1052), 5 states have internal predecessors, (1052), 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 21:22:15,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 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 21:22:15,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 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 21:22:15,458 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 108 flow. Second operand 5 states and 1052 transitions. [2023-08-30 21:22:15,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 346 flow [2023-08-30 21:22:15,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:22:15,462 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 149 flow [2023-08-30 21:22:15,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-30 21:22:15,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-30 21:22:15,474 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 149 flow [2023-08-30 21:22:15,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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 21:22:15,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:15,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:15,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:22:15,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:15,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1985387241, now seen corresponding path program 3 times [2023-08-30 21:22:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:15,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265848703] [2023-08-30 21:22:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:15,787 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 21:22:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:15,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265848703] [2023-08-30 21:22:15,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265848703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:15,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:22:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201375471] [2023-08-30 21:22:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:22:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:22:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:22:15,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 438 [2023-08-30 21:22:15,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 149 flow. Second operand has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 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 21:22:15,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:15,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 438 [2023-08-30 21:22:15,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:16,492 INFO L130 PetriNetUnfolder]: 4931/6722 cut-off events. [2023-08-30 21:22:16,493 INFO L131 PetriNetUnfolder]: For 3310/3310 co-relation queries the response was YES. [2023-08-30 21:22:16,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16349 conditions, 6722 events. 4931/6722 cut-off events. For 3310/3310 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32310 event pairs, 338 based on Foata normal form. 164/6161 useless extension candidates. Maximal degree in co-relation 8964. Up to 2244 conditions per place. [2023-08-30 21:22:16,519 INFO L137 encePairwiseOnDemand]: 431/438 looper letters, 86 selfloop transitions, 7 changer transitions 21/115 dead transitions. [2023-08-30 21:22:16,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 115 transitions, 600 flow [2023-08-30 21:22:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:22:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:22:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1447 transitions. [2023-08-30 21:22:16,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719504240052185 [2023-08-30 21:22:16,524 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1447 transitions. [2023-08-30 21:22:16,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1447 transitions. [2023-08-30 21:22:16,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:16,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1447 transitions. [2023-08-30 21:22:16,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 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 21:22:16,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 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 21:22:16,534 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 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 21:22:16,534 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 149 flow. Second operand 7 states and 1447 transitions. [2023-08-30 21:22:16,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 115 transitions, 600 flow [2023-08-30 21:22:16,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 115 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:22:16,544 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 156 flow [2023-08-30 21:22:16,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-08-30 21:22:16,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-08-30 21:22:16,545 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 156 flow [2023-08-30 21:22:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 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 21:22:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:16,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:16,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:22:16,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:16,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash 529060162, now seen corresponding path program 1 times [2023-08-30 21:22:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:16,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83677338] [2023-08-30 21:22:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:16,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:16,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83677338] [2023-08-30 21:22:16,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83677338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:16,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:16,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:22:16,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603066274] [2023-08-30 21:22:16,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:16,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:22:16,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:16,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:22:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:22:16,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 438 [2023-08-30 21:22:16,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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 21:22:16,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:16,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 438 [2023-08-30 21:22:16,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:17,063 INFO L130 PetriNetUnfolder]: 1897/2812 cut-off events. [2023-08-30 21:22:17,064 INFO L131 PetriNetUnfolder]: For 3281/3281 co-relation queries the response was YES. [2023-08-30 21:22:17,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7253 conditions, 2812 events. 1897/2812 cut-off events. For 3281/3281 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12993 event pairs, 492 based on Foata normal form. 54/2554 useless extension candidates. Maximal degree in co-relation 2968. Up to 2139 conditions per place. [2023-08-30 21:22:17,081 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 45 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-30 21:22:17,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 272 flow [2023-08-30 21:22:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:22:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:22:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-30 21:22:17,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832572298325723 [2023-08-30 21:22:17,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-30 21:22:17,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-30 21:22:17,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:17,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-30 21:22:17,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 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 21:22:17,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 21:22:17,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 21:22:17,093 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 156 flow. Second operand 3 states and 635 transitions. [2023-08-30 21:22:17,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 272 flow [2023-08-30 21:22:17,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 244 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-30 21:22:17,099 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 130 flow [2023-08-30 21:22:17,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-30 21:22:17,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 21:22:17,102 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 130 flow [2023-08-30 21:22:17,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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 21:22:17,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:17,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:17,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:22:17,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:17,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1604329013, now seen corresponding path program 1 times [2023-08-30 21:22:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043657631] [2023-08-30 21:22:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043657631] [2023-08-30 21:22:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043657631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:17,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:22:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310108367] [2023-08-30 21:22:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:17,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:17,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 438 [2023-08-30 21:22:17,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 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 21:22:17,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:17,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 438 [2023-08-30 21:22:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:17,631 INFO L130 PetriNetUnfolder]: 2162/3195 cut-off events. [2023-08-30 21:22:17,632 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2023-08-30 21:22:17,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 3195 events. 2162/3195 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15056 event pairs, 1534 based on Foata normal form. 44/2841 useless extension candidates. Maximal degree in co-relation 3779. Up to 2560 conditions per place. [2023-08-30 21:22:17,656 INFO L137 encePairwiseOnDemand]: 434/438 looper letters, 34 selfloop transitions, 2 changer transitions 17/58 dead transitions. [2023-08-30 21:22:17,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 281 flow [2023-08-30 21:22:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 820 transitions. [2023-08-30 21:22:17,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680365296803653 [2023-08-30 21:22:17,659 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 820 transitions. [2023-08-30 21:22:17,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 820 transitions. [2023-08-30 21:22:17,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:17,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 820 transitions. [2023-08-30 21:22:17,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 21:22:17,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 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 21:22:17,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 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 21:22:17,665 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 130 flow. Second operand 4 states and 820 transitions. [2023-08-30 21:22:17,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 281 flow [2023-08-30 21:22:17,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:22:17,670 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 142 flow [2023-08-30 21:22:17,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-30 21:22:17,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-08-30 21:22:17,673 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 142 flow [2023-08-30 21:22:17,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 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 21:22:17,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:17,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:22:17,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:17,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash 716362356, now seen corresponding path program 1 times [2023-08-30 21:22:17,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:17,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598028260] [2023-08-30 21:22:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:17,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:17,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:17,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598028260] [2023-08-30 21:22:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598028260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:17,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:17,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:22:17,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974086877] [2023-08-30 21:22:17,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:17,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:22:17,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:22:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:22:17,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 438 [2023-08-30 21:22:17,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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 21:22:17,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:17,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 438 [2023-08-30 21:22:17,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:18,140 INFO L130 PetriNetUnfolder]: 1464/2239 cut-off events. [2023-08-30 21:22:18,141 INFO L131 PetriNetUnfolder]: For 1464/1464 co-relation queries the response was YES. [2023-08-30 21:22:18,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5761 conditions, 2239 events. 1464/2239 cut-off events. For 1464/1464 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9852 event pairs, 683 based on Foata normal form. 34/2073 useless extension candidates. Maximal degree in co-relation 5738. Up to 1902 conditions per place. [2023-08-30 21:22:18,151 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 45 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-08-30 21:22:18,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 278 flow [2023-08-30 21:22:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:22:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:22:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-30 21:22:18,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885844748858447 [2023-08-30 21:22:18,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-30 21:22:18,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-30 21:22:18,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:18,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-30 21:22:18,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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 21:22:18,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 21:22:18,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 21:22:18,158 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 142 flow. Second operand 3 states and 642 transitions. [2023-08-30 21:22:18,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 278 flow [2023-08-30 21:22:18,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 272 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:22:18,161 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 148 flow [2023-08-30 21:22:18,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-08-30 21:22:18,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-08-30 21:22:18,162 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 148 flow [2023-08-30 21:22:18,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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 21:22:18,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:18,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:18,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:22:18,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:18,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2092257775, now seen corresponding path program 1 times [2023-08-30 21:22:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:18,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115760485] [2023-08-30 21:22:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:22:18,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115760485] [2023-08-30 21:22:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115760485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:18,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:18,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:22:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45743275] [2023-08-30 21:22:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:18,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:18,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 438 [2023-08-30 21:22:18,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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 21:22:18,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:18,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 438 [2023-08-30 21:22:18,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:18,586 INFO L130 PetriNetUnfolder]: 1572/2450 cut-off events. [2023-08-30 21:22:18,587 INFO L131 PetriNetUnfolder]: For 1768/1768 co-relation queries the response was YES. [2023-08-30 21:22:18,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 2450 events. 1572/2450 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10885 event pairs, 1205 based on Foata normal form. 22/2270 useless extension candidates. Maximal degree in co-relation 6152. Up to 2077 conditions per place. [2023-08-30 21:22:18,598 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 36 selfloop transitions, 2 changer transitions 18/61 dead transitions. [2023-08-30 21:22:18,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 313 flow [2023-08-30 21:22:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:22:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:22:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2023-08-30 21:22:18,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625570776255708 [2023-08-30 21:22:18,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2023-08-30 21:22:18,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2023-08-30 21:22:18,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:18,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2023-08-30 21:22:18,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 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 21:22:18,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 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 21:22:18,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 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 21:22:18,609 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 148 flow. Second operand 5 states and 1013 transitions. [2023-08-30 21:22:18,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 313 flow [2023-08-30 21:22:18,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:22:18,613 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 162 flow [2023-08-30 21:22:18,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-30 21:22:18,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2023-08-30 21:22:18,614 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 162 flow [2023-08-30 21:22:18,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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 21:22:18,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:18,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:22:18,616 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:22:18,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash -645640744, now seen corresponding path program 1 times [2023-08-30 21:22:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587158005] [2023-08-30 21:22:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:20,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587158005] [2023-08-30 21:22:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587158005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839774589] [2023-08-30 21:22:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:20,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:22:20,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:22:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 21:22:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:22:21,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:22:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:22:21,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:22:21,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:22:21,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-08-30 21:22:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:21,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:22,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:22:22,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1987 treesize of output 1799 [2023-08-30 21:22:22,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:22:22,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 350 [2023-08-30 21:22:22,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:22:22,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 303 [2023-08-30 21:22:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839774589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:22:39,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:22:39,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2023-08-30 21:22:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146003597] [2023-08-30 21:22:39,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:22:39,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 21:22:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 21:22:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1881, Unknown=5, NotChecked=0, Total=2070 [2023-08-30 21:22:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 438 [2023-08-30 21:22:41,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 162 flow. Second operand has 46 states, 46 states have (on average 118.0) internal successors, (5428), 46 states have internal predecessors, (5428), 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 21:22:41,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:41,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 438 [2023-08-30 21:22:41,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:51,488 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:23:05,839 WARN L222 SmtUtils]: Spent 8.99s on a formula simplification. DAG size of input: 117 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:23:40,349 WARN L222 SmtUtils]: Spent 12.91s on a formula simplification. DAG size of input: 115 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:23:58,721 WARN L222 SmtUtils]: Spent 12.43s on a formula simplification. DAG size of input: 91 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:24:01,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:24:15,851 WARN L222 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 104 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:24:27,409 WARN L222 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 82 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:24:35,363 WARN L222 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 119 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:24:44,133 WARN L222 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 108 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:25:08,871 WARN L222 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 97 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:25:20,442 WARN L222 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 110 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:25:31,314 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 66 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:25:44,194 WARN L222 SmtUtils]: Spent 10.99s on a formula simplification. DAG size of input: 117 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:25:54,892 WARN L222 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 106 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:26:01,907 WARN L222 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 99 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:26:42,323 WARN L222 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 101 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:26:52,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:05,285 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:27:08,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:20,152 INFO L130 PetriNetUnfolder]: 27151/38729 cut-off events. [2023-08-30 21:27:20,152 INFO L131 PetriNetUnfolder]: For 29726/29726 co-relation queries the response was YES. [2023-08-30 21:27:20,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108249 conditions, 38729 events. 27151/38729 cut-off events. For 29726/29726 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 234312 event pairs, 534 based on Foata normal form. 759/36999 useless extension candidates. Maximal degree in co-relation 108226. Up to 6309 conditions per place. [2023-08-30 21:27:20,403 INFO L137 encePairwiseOnDemand]: 411/438 looper letters, 1692 selfloop transitions, 947 changer transitions 311/2950 dead transitions. [2023-08-30 21:27:20,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 2950 transitions, 15251 flow [2023-08-30 21:27:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2023-08-30 21:27:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2023-08-30 21:27:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 37229 transitions. [2023-08-30 21:27:20,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871544489695175 [2023-08-30 21:27:20,619 INFO L72 ComplementDD]: Start complementDD. Operand 296 states and 37229 transitions. [2023-08-30 21:27:20,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 296 states and 37229 transitions. [2023-08-30 21:27:20,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:27:20,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 296 states and 37229 transitions. [2023-08-30 21:27:20,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 297 states, 296 states have (on average 125.77364864864865) internal successors, (37229), 296 states have internal predecessors, (37229), 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 21:27:20,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 297 states, 297 states have (on average 438.0) internal successors, (130086), 297 states have internal predecessors, (130086), 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 21:27:20,905 INFO L81 ComplementDD]: Finished complementDD. Result has 297 states, 297 states have (on average 438.0) internal successors, (130086), 297 states have internal predecessors, (130086), 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 21:27:20,905 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 162 flow. Second operand 296 states and 37229 transitions. [2023-08-30 21:27:20,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 2950 transitions, 15251 flow [2023-08-30 21:27:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2950 transitions, 15231 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 21:27:21,000 INFO L231 Difference]: Finished difference. Result has 440 places, 1209 transitions, 7577 flow [2023-08-30 21:27:21,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=296, PETRI_FLOW=7577, PETRI_PLACES=440, PETRI_TRANSITIONS=1209} [2023-08-30 21:27:21,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2023-08-30 21:27:21,004 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1209 transitions, 7577 flow [2023-08-30 21:27:21,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 118.0) internal successors, (5428), 46 states have internal predecessors, (5428), 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 21:27:21,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:27:21,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:27:21,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:27:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:27:21,214 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 21:27:21,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:27:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1127794134, now seen corresponding path program 2 times [2023-08-30 21:27:21,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:27:21,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089654180] [2023-08-30 21:27:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:27:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:27:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:27:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:27:23,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:27:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089654180] [2023-08-30 21:27:23,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089654180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:27:23,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974881981] [2023-08-30 21:27:23,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:27:23,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:27:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:27:23,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:27:23,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:27:23,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:27:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:27:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 21:27:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:27:24,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:27:24,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:27:24,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:27:24,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:27:24,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:27:24,910 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 21:27:24,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-08-30 21:27:24,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 21:27:24,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-30 21:27:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:27:25,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:27:25,371 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_358 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_358) c_~queue2~0.base) (+ c_~queue2~0.offset (* c_~front2~0 4))) c_~d2~0) (+ (* c_~W~0 2) 1))) is different from false [2023-08-30 21:27:26,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:27:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-08-30 21:27:26,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:27:26,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2229 treesize of output 2177 [2023-08-30 21:27:26,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:27:26,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2085 treesize of output 1733 [2023-08-30 21:27:26,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:27:26,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1653 treesize of output 1517 [2023-08-30 21:27:26,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:27:26,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1298 treesize of output 1270 [2023-08-30 21:27:26,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 230 [2023-08-30 21:35:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:35:13,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974881981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:35:13,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:35:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 49 [2023-08-30 21:35:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644973447] [2023-08-30 21:35:13,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:35:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-30 21:35:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:35:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-30 21:35:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2140, Unknown=8, NotChecked=94, Total=2450 [2023-08-30 21:35:13,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 438 [2023-08-30 21:35:13,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1209 transitions, 7577 flow. Second operand has 50 states, 50 states have (on average 110.84) internal successors, (5542), 50 states have internal predecessors, (5542), 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 21:35:13,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:35:13,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 438 [2023-08-30 21:35:13,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15