./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-5.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/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --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 21:53:48,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:53:48,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:53:48,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:53:48,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:53:48,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:53:48,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:53:48,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:53:48,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:53:48,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:53:48,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:53:48,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:53:48,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:53:48,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:53:48,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:53:48,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:53:48,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:53:48,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:53:48,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:53:48,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:53:48,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:53:48,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:53:48,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:53:48,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:53:48,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:53:48,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:53:48,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:53:48,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:53:48,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:53:48,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:53:48,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:53:48,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:53:48,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:53:48,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:53:48,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:53:48,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:53:48,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:53:48,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:53:48,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:53:48,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:53:48,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:53:48,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:53:48,450 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:53:48,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:53:48,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:53:48,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:53:48,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:53:48,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:53:48,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:53:48,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:53:48,453 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:53:48,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:53:48,454 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:53:48,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:53:48,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:53:48,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:53:48,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:53:48,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:53:48,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:53:48,455 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:53:48,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:53:48,456 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:53:48,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:53:48,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:53:48,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:53:48,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:53:48,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:53:48,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:53:48,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:53:48,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:53:48,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:53:48,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:53:48,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:53:48,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:53:48,462 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:53:48,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:53:48,462 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:53:48,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:53:48,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:53:48,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:53:48,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:53:48,694 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:53:48,695 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:53:48,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 21:53:49,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:53:49,751 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:53:49,752 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 21:53:49,757 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b811272b5/e7fe378854994031b4fc357b490b9ac6/FLAG8a572edd8 [2023-08-30 21:53:49,766 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b811272b5/e7fe378854994031b4fc357b490b9ac6 [2023-08-30 21:53:49,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:53:49,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:53:49,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:53:49,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:53:49,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:53:49,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:49,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450f1b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49, skipping insertion in model container [2023-08-30 21:53:49,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:49,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:53:49,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:53:49,904 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/unroll-5.wvr.c[2644,2657] [2023-08-30 21:53:49,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:53:49,915 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:53:49,928 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/unroll-5.wvr.c[2644,2657] [2023-08-30 21:53:49,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:53:49,940 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:53:49,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49 WrapperNode [2023-08-30 21:53:49,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:53:49,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:53:49,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:53:49,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:53:49,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:49,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:49,982 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 167 [2023-08-30 21:53:49,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:53:49,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:53:49,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:53:49,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:53:49,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:49,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:53:50,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:53:50,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:53:50,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:53:50,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (1/1) ... [2023-08-30 21:53:50,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:53:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:50,062 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 21:53:50,081 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 21:53:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:53:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:53:50,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:53:50,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:53:50,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:53:50,091 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 21:53:50,214 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:53:50,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:53:50,426 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:53:50,432 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:53:50,432 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:53:50,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:53:50 BoogieIcfgContainer [2023-08-30 21:53:50,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:53:50,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:53:50,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:53:50,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:53:50,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:53:49" (1/3) ... [2023-08-30 21:53:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e98ac9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:53:50, skipping insertion in model container [2023-08-30 21:53:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:53:49" (2/3) ... [2023-08-30 21:53:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e98ac9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:53:50, skipping insertion in model container [2023-08-30 21:53:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:53:50" (3/3) ... [2023-08-30 21:53:50,439 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-08-30 21:53:50,449 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:53:50,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:53:50,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:53:50,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:53:50,536 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:53:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 196 transitions, 408 flow [2023-08-30 21:53:50,629 INFO L130 PetriNetUnfolder]: 17/194 cut-off events. [2023-08-30 21:53:50,630 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:53:50,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 17/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 165 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-30 21:53:50,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 196 transitions, 408 flow [2023-08-30 21:53:50,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 186 transitions, 384 flow [2023-08-30 21:53:50,642 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:53:50,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 186 transitions, 384 flow [2023-08-30 21:53:50,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 186 transitions, 384 flow [2023-08-30 21:53:50,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 186 transitions, 384 flow [2023-08-30 21:53:50,671 INFO L130 PetriNetUnfolder]: 17/186 cut-off events. [2023-08-30 21:53:50,676 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:53:50,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 17/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 147 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-30 21:53:50,679 INFO L119 LiptonReduction]: Number of co-enabled transitions 3892 [2023-08-30 21:53:55,268 INFO L134 LiptonReduction]: Checked pairs total: 3908 [2023-08-30 21:53:55,268 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-30 21:53:55,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:53:55,284 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;@24bdb8ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:53:55,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:53:55,294 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 21:53:55,294 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:53:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:55,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:55,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:55,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1925462898, now seen corresponding path program 1 times [2023-08-30 21:53:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019493458] [2023-08-30 21:53:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:55,603 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 21:53:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019493458] [2023-08-30 21:53:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019493458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:55,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:53:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999454266] [2023-08-30 21:53:55,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:55,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:53:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:55,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:53:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:53:55,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-08-30 21:53:55,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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 21:53:55,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:55,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-08-30 21:53:55,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:55,728 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-30 21:53:55,728 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 21:53:55,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-30 21:53:55,732 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-30 21:53:55,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-30 21:53:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:53:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:53:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-30 21:53:55,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194053208137715 [2023-08-30 21:53:55,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-30 21:53:55,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-30 21:53:55,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:55,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-30 21:53:55,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 21:53:55,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 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 21:53:55,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 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 21:53:55,757 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 536 transitions. [2023-08-30 21:53:55,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-30 21:53:55,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:53:55,760 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-30 21:53:55,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-30 21:53:55,764 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 21:53:55,764 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-30 21:53:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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 21:53:55,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:55,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:55,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:53:55,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:55,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash 406205141, now seen corresponding path program 1 times [2023-08-30 21:53:55,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:55,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375971944] [2023-08-30 21:53:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:55,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:53:55,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:55,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375971944] [2023-08-30 21:53:55,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375971944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:55,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:55,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:53:55,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627117160] [2023-08-30 21:53:55,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:55,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:53:55,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:53:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:53:55,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 426 [2023-08-30 21:53:55,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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 21:53:55,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:55,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 426 [2023-08-30 21:53:55,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:56,035 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-08-30 21:53:56,036 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:53:56,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-30 21:53:56,039 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-30 21:53:56,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-30 21:53:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:53:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:53:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-30 21:53:56,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41705790297339596 [2023-08-30 21:53:56,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-30 21:53:56,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-30 21:53:56,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:56,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-30 21:53:56,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 21:53:56,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 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 21:53:56,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 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 21:53:56,047 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 533 transitions. [2023-08-30 21:53:56,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-30 21:53:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:53:56,048 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-30 21:53:56,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-30 21:53:56,049 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-30 21:53:56,049 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-30 21:53:56,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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 21:53:56,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:56,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:56,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:53:56,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:56,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash -91515540, now seen corresponding path program 1 times [2023-08-30 21:53:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:56,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993518854] [2023-08-30 21:53:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:56,210 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 21:53:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:56,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993518854] [2023-08-30 21:53:56,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993518854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:56,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:56,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:53:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221196672] [2023-08-30 21:53:56,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:56,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:53:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:53:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:53:56,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 426 [2023-08-30 21:53:56,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 21:53:56,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:56,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 426 [2023-08-30 21:53:56,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:56,357 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-08-30 21:53:56,358 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 21:53:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 576 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-08-30 21:53:56,359 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-08-30 21:53:56,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-08-30 21:53:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:53:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:53:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 861 transitions. [2023-08-30 21:53:56,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042253521126761 [2023-08-30 21:53:56,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 861 transitions. [2023-08-30 21:53:56,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 861 transitions. [2023-08-30 21:53:56,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:56,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 861 transitions. [2023-08-30 21:53:56,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.2) internal successors, (861), 5 states have internal predecessors, (861), 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 21:53:56,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 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 21:53:56,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 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 21:53:56,367 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 861 transitions. [2023-08-30 21:53:56,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-08-30 21:53:56,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:53:56,369 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-08-30 21:53:56,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-30 21:53:56,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-30 21:53:56,373 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-08-30 21:53:56,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 21:53:56,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:56,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:56,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:53:56,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:56,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 531655878, now seen corresponding path program 2 times [2023-08-30 21:53:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:56,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449150867] [2023-08-30 21:53:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:56,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:56,464 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 21:53:56,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449150867] [2023-08-30 21:53:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449150867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:56,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:53:56,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267575142] [2023-08-30 21:53:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:56,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:53:56,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:53:56,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:53:56,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 426 [2023-08-30 21:53:56,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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 21:53:56,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:56,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 426 [2023-08-30 21:53:56,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:56,556 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-08-30 21:53:56,556 INFO L131 PetriNetUnfolder]: For 123/135 co-relation queries the response was YES. [2023-08-30 21:53:56,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 123/135 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 524 event pairs, 24 based on Foata normal form. 7/164 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-08-30 21:53:56,559 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-08-30 21:53:56,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-08-30 21:53:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:53:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:53:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-08-30 21:53:56,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41784037558685444 [2023-08-30 21:53:56,562 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-08-30 21:53:56,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-08-30 21:53:56,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:56,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-08-30 21:53:56,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 21:53:56,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:56,567 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:56,567 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 712 transitions. [2023-08-30 21:53:56,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-08-30 21:53:56,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 21:53:56,570 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-08-30 21:53:56,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 21:53:56,572 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-08-30 21:53:56,572 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-08-30 21:53:56,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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 21:53:56,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:56,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:56,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:53:56,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:56,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash 51165837, now seen corresponding path program 1 times [2023-08-30 21:53:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:56,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362420970] [2023-08-30 21:53:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:56,660 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 21:53:56,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362420970] [2023-08-30 21:53:56,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362420970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:56,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:56,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:53:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338238801] [2023-08-30 21:53:56,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:56,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:53:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:53:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:53:56,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 426 [2023-08-30 21:53:56,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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 21:53:56,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:56,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 426 [2023-08-30 21:53:56,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:56,758 INFO L130 PetriNetUnfolder]: 82/167 cut-off events. [2023-08-30 21:53:56,758 INFO L131 PetriNetUnfolder]: For 226/246 co-relation queries the response was YES. [2023-08-30 21:53:56,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 167 events. 82/167 cut-off events. For 226/246 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 565 event pairs, 31 based on Foata normal form. 18/180 useless extension candidates. Maximal degree in co-relation 491. Up to 114 conditions per place. [2023-08-30 21:53:56,759 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 32 selfloop transitions, 4 changer transitions 2/40 dead transitions. [2023-08-30 21:53:56,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 254 flow [2023-08-30 21:53:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:53:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:53:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 694 transitions. [2023-08-30 21:53:56,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072769953051643 [2023-08-30 21:53:56,762 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 694 transitions. [2023-08-30 21:53:56,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 694 transitions. [2023-08-30 21:53:56,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:56,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 694 transitions. [2023-08-30 21:53:56,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 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 21:53:56,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:56,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:56,766 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 4 states and 694 transitions. [2023-08-30 21:53:56,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 254 flow [2023-08-30 21:53:56,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:53:56,770 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 139 flow [2023-08-30 21:53:56,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 21:53:56,772 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-30 21:53:56,772 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 139 flow [2023-08-30 21:53:56,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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 21:53:56,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:56,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:56,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:53:56,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:56,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash 151453329, now seen corresponding path program 2 times [2023-08-30 21:53:56,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:56,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21634020] [2023-08-30 21:53:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:53:56,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:56,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21634020] [2023-08-30 21:53:56,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21634020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:56,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655011605] [2023-08-30 21:53:56,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:53:56,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:56,868 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 21:53:56,871 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 21:53:57,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:53:57,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:53:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:57,076 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 21:53:57,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 21:53:57,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655011605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:57,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 21:53:57,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-08-30 21:53:57,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182674285] [2023-08-30 21:53:57,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:53:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:53:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:53:57,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 426 [2023-08-30 21:53:57,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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 21:53:57,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:57,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 426 [2023-08-30 21:53:57,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:57,196 INFO L130 PetriNetUnfolder]: 90/181 cut-off events. [2023-08-30 21:53:57,196 INFO L131 PetriNetUnfolder]: For 303/321 co-relation queries the response was YES. [2023-08-30 21:53:57,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 181 events. 90/181 cut-off events. For 303/321 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 602 event pairs, 27 based on Foata normal form. 20/196 useless extension candidates. Maximal degree in co-relation 643. Up to 126 conditions per place. [2023-08-30 21:53:57,197 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 30 selfloop transitions, 4 changer transitions 5/41 dead transitions. [2023-08-30 21:53:57,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 281 flow [2023-08-30 21:53:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:53:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:53:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 698 transitions. [2023-08-30 21:53:57,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096244131455399 [2023-08-30 21:53:57,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 698 transitions. [2023-08-30 21:53:57,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 698 transitions. [2023-08-30 21:53:57,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:57,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 698 transitions. [2023-08-30 21:53:57,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 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 21:53:57,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:57,203 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:57,203 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 139 flow. Second operand 4 states and 698 transitions. [2023-08-30 21:53:57,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 281 flow [2023-08-30 21:53:57,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 270 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 21:53:57,205 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 164 flow [2023-08-30 21:53:57,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-30 21:53:57,206 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-08-30 21:53:57,206 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 164 flow [2023-08-30 21:53:57,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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 21:53:57,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:57,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:57,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:53:57,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 21:53:57,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:57,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1653193011, now seen corresponding path program 3 times [2023-08-30 21:53:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:57,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072483605] [2023-08-30 21:53:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:53:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:57,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072483605] [2023-08-30 21:53:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072483605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863280296] [2023-08-30 21:53:57,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:53:57,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:57,483 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 21:53:57,485 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 21:53:57,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:53:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:53:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:57,656 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 21:53:57,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 21:53:57,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863280296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:57,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 21:53:57,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-08-30 21:53:57,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805923041] [2023-08-30 21:53:57,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:57,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:53:57,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:53:57,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:53:57,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 426 [2023-08-30 21:53:57,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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 21:53:57,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:57,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 426 [2023-08-30 21:53:57,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:57,740 INFO L130 PetriNetUnfolder]: 92/180 cut-off events. [2023-08-30 21:53:57,741 INFO L131 PetriNetUnfolder]: For 506/524 co-relation queries the response was YES. [2023-08-30 21:53:57,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 180 events. 92/180 cut-off events. For 506/524 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 604 event pairs, 35 based on Foata normal form. 20/194 useless extension candidates. Maximal degree in co-relation 672. Up to 126 conditions per place. [2023-08-30 21:53:57,742 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 29 selfloop transitions, 8 changer transitions 3/42 dead transitions. [2023-08-30 21:53:57,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 314 flow [2023-08-30 21:53:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:53:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:53:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-08-30 21:53:57,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078638497652582 [2023-08-30 21:53:57,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-08-30 21:53:57,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-08-30 21:53:57,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:57,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-08-30 21:53:57,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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 21:53:57,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:57,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 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 21:53:57,748 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 164 flow. Second operand 4 states and 695 transitions. [2023-08-30 21:53:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 314 flow [2023-08-30 21:53:57,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 301 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 21:53:57,750 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 200 flow [2023-08-30 21:53:57,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 21:53:57,750 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-30 21:53:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 200 flow [2023-08-30 21:53:57,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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 21:53:57,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:57,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:57,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:53:57,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 21:53:57,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:57,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:57,958 INFO L85 PathProgramCache]: Analyzing trace with hash 414711862, now seen corresponding path program 3 times [2023-08-30 21:53:57,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:57,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537395492] [2023-08-30 21:53:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:58,056 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 21:53:58,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:58,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537395492] [2023-08-30 21:53:58,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537395492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:58,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:58,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:53:58,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460448258] [2023-08-30 21:53:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:58,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:53:58,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:53:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:53:58,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 426 [2023-08-30 21:53:58,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 21:53:58,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:58,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 426 [2023-08-30 21:53:58,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:58,162 INFO L130 PetriNetUnfolder]: 108/207 cut-off events. [2023-08-30 21:53:58,162 INFO L131 PetriNetUnfolder]: For 562/562 co-relation queries the response was YES. [2023-08-30 21:53:58,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 207 events. 108/207 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 670 event pairs, 38 based on Foata normal form. 4/210 useless extension candidates. Maximal degree in co-relation 824. Up to 147 conditions per place. [2023-08-30 21:53:58,163 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 33 selfloop transitions, 10 changer transitions 4/47 dead transitions. [2023-08-30 21:53:58,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 388 flow [2023-08-30 21:53:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:53:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:53:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-08-30 21:53:58,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014084507042254 [2023-08-30 21:53:58,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-08-30 21:53:58,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-08-30 21:53:58,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:58,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-08-30 21:53:58,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 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 21:53:58,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 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 21:53:58,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 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 21:53:58,170 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 200 flow. Second operand 5 states and 855 transitions. [2023-08-30 21:53:58,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 388 flow [2023-08-30 21:53:58,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 364 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 21:53:58,172 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 255 flow [2023-08-30 21:53:58,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-30 21:53:58,173 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-08-30 21:53:58,173 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 255 flow [2023-08-30 21:53:58,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 21:53:58,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:58,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:58,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 21:53:58,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:58,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1611530206, now seen corresponding path program 4 times [2023-08-30 21:53:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512966461] [2023-08-30 21:53:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:58,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:58,237 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 21:53:58,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512966461] [2023-08-30 21:53:58,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512966461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:53:58,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:53:58,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:53:58,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544873515] [2023-08-30 21:53:58,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:53:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:53:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:53:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:53:58,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 426 [2023-08-30 21:53:58,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 21:53:58,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:58,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 426 [2023-08-30 21:53:58,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:58,351 INFO L130 PetriNetUnfolder]: 108/201 cut-off events. [2023-08-30 21:53:58,351 INFO L131 PetriNetUnfolder]: For 630/630 co-relation queries the response was YES. [2023-08-30 21:53:58,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 201 events. 108/201 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 31 based on Foata normal form. 4/204 useless extension candidates. Maximal degree in co-relation 858. Up to 138 conditions per place. [2023-08-30 21:53:58,352 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 31 selfloop transitions, 14 changer transitions 6/51 dead transitions. [2023-08-30 21:53:58,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 446 flow [2023-08-30 21:53:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:53:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:53:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 858 transitions. [2023-08-30 21:53:58,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-08-30 21:53:58,354 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 858 transitions. [2023-08-30 21:53:58,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 858 transitions. [2023-08-30 21:53:58,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:58,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 858 transitions. [2023-08-30 21:53:58,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 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 21:53:58,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 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 21:53:58,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 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 21:53:58,359 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 255 flow. Second operand 5 states and 858 transitions. [2023-08-30 21:53:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 446 flow [2023-08-30 21:53:58,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 435 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:53:58,361 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 322 flow [2023-08-30 21:53:58,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-30 21:53:58,362 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-08-30 21:53:58,362 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 322 flow [2023-08-30 21:53:58,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 21:53:58,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:58,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 21:53:58,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:58,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -541961488, now seen corresponding path program 1 times [2023-08-30 21:53:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291915295] [2023-08-30 21:53:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:53:58,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:58,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291915295] [2023-08-30 21:53:58,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291915295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:58,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070517296] [2023-08-30 21:53:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:58,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:58,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:53:58,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:53:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:58,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 21:53:58,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:58,766 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 11 treesize of output 7 [2023-08-30 21:53:58,811 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 21:53:58,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:53:58,887 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 14 treesize of output 16 [2023-08-30 21:53:58,990 INFO L321 Elim1Store]: treesize reduction 29, result has 64.2 percent of original size [2023-08-30 21:53:58,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 84 [2023-08-30 21:53:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:59,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:59,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:59,327 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 371 treesize of output 215 [2023-08-30 21:53:59,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:59,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 700 treesize of output 708 [2023-08-30 21:53:59,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:59,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 370 treesize of output 342 [2023-08-30 21:53:59,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:59,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 245 [2023-08-30 21:54:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070517296] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:06,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:06,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-30 21:54:06,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152604912] [2023-08-30 21:54:06,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:06,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:54:06,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:54:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=192, Unknown=4, NotChecked=0, Total=240 [2023-08-30 21:54:08,996 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 21:54:09,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 426 [2023-08-30 21:54:09,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 322 flow. Second operand has 16 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 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 21:54:09,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:09,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 426 [2023-08-30 21:54:09,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:10,758 INFO L130 PetriNetUnfolder]: 243/430 cut-off events. [2023-08-30 21:54:10,758 INFO L131 PetriNetUnfolder]: For 1418/1444 co-relation queries the response was YES. [2023-08-30 21:54:10,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 430 events. 243/430 cut-off events. For 1418/1444 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1657 event pairs, 16 based on Foata normal form. 36/460 useless extension candidates. Maximal degree in co-relation 1656. Up to 209 conditions per place. [2023-08-30 21:54:10,760 INFO L137 encePairwiseOnDemand]: 418/426 looper letters, 35 selfloop transitions, 20 changer transitions 64/122 dead transitions. [2023-08-30 21:54:10,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 122 transitions, 1087 flow [2023-08-30 21:54:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:54:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:54:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2380 transitions. [2023-08-30 21:54:10,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2793427230046948 [2023-08-30 21:54:10,766 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2380 transitions. [2023-08-30 21:54:10,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2380 transitions. [2023-08-30 21:54:10,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:10,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2380 transitions. [2023-08-30 21:54:10,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 119.0) internal successors, (2380), 20 states have internal predecessors, (2380), 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 21:54:10,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 426.0) internal successors, (8946), 21 states have internal predecessors, (8946), 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 21:54:10,784 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 426.0) internal successors, (8946), 21 states have internal predecessors, (8946), 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 21:54:10,785 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 322 flow. Second operand 20 states and 2380 transitions. [2023-08-30 21:54:10,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 122 transitions, 1087 flow [2023-08-30 21:54:10,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 999 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 21:54:10,789 INFO L231 Difference]: Finished difference. Result has 70 places, 40 transitions, 383 flow [2023-08-30 21:54:10,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=383, PETRI_PLACES=70, PETRI_TRANSITIONS=40} [2023-08-30 21:54:10,790 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-08-30 21:54:10,790 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 40 transitions, 383 flow [2023-08-30 21:54:10,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 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 21:54:10,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:10,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:10,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:10,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:10,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1708393027, now seen corresponding path program 2 times [2023-08-30 21:54:10,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:10,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952767918] [2023-08-30 21:54:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:10,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:11,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:11,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952767918] [2023-08-30 21:54:11,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952767918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:11,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090132364] [2023-08-30 21:54:11,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:54:11,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:11,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:11,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:11,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:54:12,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:54:12,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:54:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090132364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:12,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2023-08-30 21:54:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122574687] [2023-08-30 21:54:12,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:54:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:54:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:54:14,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 426 [2023-08-30 21:54:14,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 40 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 165.33333333333334) internal successors, (2480), 15 states have internal predecessors, (2480), 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 21:54:14,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:14,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 426 [2023-08-30 21:54:14,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:20,201 INFO L130 PetriNetUnfolder]: 230/398 cut-off events. [2023-08-30 21:54:20,201 INFO L131 PetriNetUnfolder]: For 2010/2010 co-relation queries the response was YES. [2023-08-30 21:54:20,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 conditions, 398 events. 230/398 cut-off events. For 2010/2010 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1390 event pairs, 11 based on Foata normal form. 62/460 useless extension candidates. Maximal degree in co-relation 2182. Up to 213 conditions per place. [2023-08-30 21:54:20,205 INFO L137 encePairwiseOnDemand]: 420/426 looper letters, 89 selfloop transitions, 52 changer transitions 0/141 dead transitions. [2023-08-30 21:54:20,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 141 transitions, 1397 flow [2023-08-30 21:54:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:54:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:54:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4037 transitions. [2023-08-30 21:54:20,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39485524256651017 [2023-08-30 21:54:20,212 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4037 transitions. [2023-08-30 21:54:20,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4037 transitions. [2023-08-30 21:54:20,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:20,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4037 transitions. [2023-08-30 21:54:20,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.20833333333334) internal successors, (4037), 24 states have internal predecessors, (4037), 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 21:54:20,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 426.0) internal successors, (10650), 25 states have internal predecessors, (10650), 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 21:54:20,228 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 426.0) internal successors, (10650), 25 states have internal predecessors, (10650), 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 21:54:20,228 INFO L175 Difference]: Start difference. First operand has 70 places, 40 transitions, 383 flow. Second operand 24 states and 4037 transitions. [2023-08-30 21:54:20,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 141 transitions, 1397 flow [2023-08-30 21:54:20,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 141 transitions, 1266 flow, removed 47 selfloop flow, removed 11 redundant places. [2023-08-30 21:54:20,233 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 889 flow [2023-08-30 21:54:20,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=889, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2023-08-30 21:54:20,234 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-08-30 21:54:20,234 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 889 flow [2023-08-30 21:54:20,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 165.33333333333334) internal successors, (2480), 15 states have internal predecessors, (2480), 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 21:54:20,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:20,235 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:20,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:20,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:20,441 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:20,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1666646071, now seen corresponding path program 3 times [2023-08-30 21:54:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:20,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347010747] [2023-08-30 21:54:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:20,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347010747] [2023-08-30 21:54:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347010747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715840446] [2023-08-30 21:54:23,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:54:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:23,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:23,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:54:23,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 21:54:23,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-30 21:54:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:23,625 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 11 treesize of output 7 [2023-08-30 21:54:23,664 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 11 treesize of output 7 [2023-08-30 21:54:23,704 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 21:54:23,739 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 21:54:24,016 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2023-08-30 21:54:24,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 62 [2023-08-30 21:54:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:24,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:25,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:25,512 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 2 case distinctions, treesize of input 1536 treesize of output 681 [2023-08-30 21:54:26,314 INFO L321 Elim1Store]: treesize reduction 5, result has 98.8 percent of original size [2023-08-30 21:54:26,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 1678 treesize of output 1809 [2023-08-30 21:54:27,725 INFO L321 Elim1Store]: treesize reduction 8, result has 98.1 percent of original size [2023-08-30 21:54:27,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 1326 treesize of output 1278 [2023-08-30 21:54:29,533 INFO L321 Elim1Store]: treesize reduction 8, result has 98.1 percent of original size [2023-08-30 21:54:29,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 525 treesize of output 741 [2023-08-30 21:54:49,708 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:54:50,533 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:55:05,911 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:55:17,434 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-08-30 21:55:23,101 WARN L222 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 625 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 21:55:51,474 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:55:55,809 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:56:06,038 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:56:17,505 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:56:21,886 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:56:23,701 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:56:27,988 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:57:15,626 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:57:17,135 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:57:18,651 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:57:33,552 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:57:39,720 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:57:41,058 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:57:51,557 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:58:03,285 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:58:38,746 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:58:50,887 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:58:55,736 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:59:07,915 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:59:20,100 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 21:59:24,671 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:59:26,484 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-30 21:59:53,683 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:59:55,655 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Killed by 15