./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.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 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:16:01,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:16:01,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:16:01,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:16:01,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:16:01,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:16:01,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:16:01,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:16:01,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:16:01,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:16:01,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:16:01,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:16:01,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:16:01,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:16:01,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:16:01,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:16:01,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:16:01,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:16:01,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:16:01,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:16:01,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:16:01,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:16:01,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:16:01,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:16:01,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:16:01,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:16:01,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:16:01,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:16:01,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:16:01,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:16:01,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:16:01,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:16:01,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:16:01,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:16:01,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:16:01,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:16:01,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:16:01,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:16:01,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:16:01,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:16:01,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:16:01,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:16:01,555 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:16:01,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:16:01,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:16:01,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:16:01,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:16:01,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:16:01,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:16:01,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:16:01,558 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:16:01,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:16:01,559 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:16:01,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:16:01,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:16:01,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:16:01,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:16:01,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:16:01,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:16:01,561 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:16:01,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:16:01,561 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:16:01,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:16:01,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:16:01,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:16:01,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:16:01,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:16:01,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:16:01,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:16:01,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:16:01,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:16:01,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:16:01,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:16:01,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:16:01,564 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:16:01,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:16:01,564 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:16:01,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:16:01,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:16:01,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:16:01,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:16:01,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:16:01,899 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:16:01,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-09-01 14:16:03,160 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:16:03,325 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:16:03,325 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-09-01 14:16:03,331 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e68c2d038/2130818e6e694213ab930543063036fa/FLAG521e7b8cb [2023-09-01 14:16:03,344 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e68c2d038/2130818e6e694213ab930543063036fa [2023-09-01 14:16:03,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:16:03,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:16:03,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:16:03,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:16:03,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:16:03,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91b5bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03, skipping insertion in model container [2023-09-01 14:16:03,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:16:03,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:16:03,521 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2023-09-01 14:16:03,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:16:03,532 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:16:03,553 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2023-09-01 14:16:03,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:16:03,560 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:16:03,561 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:16:03,567 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:16:03,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03 WrapperNode [2023-09-01 14:16:03,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:16:03,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:16:03,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:16:03,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:16:03,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,624 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-09-01 14:16:03,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:16:03,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:16:03,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:16:03,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:16:03,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:16:03,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:16:03,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:16:03,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:16:03,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (1/1) ... [2023-09-01 14:16:03,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:16:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:03,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:16:03,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:16:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:16:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:16:03,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:16:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:16:03,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:16:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:16:03,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:16:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 14:16:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 14:16:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:16:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:16:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:16:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:16:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:16:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:16:03,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:16:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:16:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:16:03,760 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:16:03,890 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:16:03,892 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:16:04,162 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:16:04,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:16:04,201 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 14:16:04,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:16:04 BoogieIcfgContainer [2023-09-01 14:16:04,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:16:04,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:16:04,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:16:04,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:16:04,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:16:03" (1/3) ... [2023-09-01 14:16:04,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3857e74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:16:04, skipping insertion in model container [2023-09-01 14:16:04,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:03" (2/3) ... [2023-09-01 14:16:04,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3857e74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:16:04, skipping insertion in model container [2023-09-01 14:16:04,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:16:04" (3/3) ... [2023-09-01 14:16:04,214 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-09-01 14:16:04,220 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:16:04,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:16:04,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:16:04,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:16:04,319 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 14:16:04,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-09-01 14:16:04,401 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-09-01 14:16:04,401 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:16:04,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 10/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-09-01 14:16:04,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-09-01 14:16:04,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-09-01 14:16:04,415 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:16:04,423 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-09-01 14:16:04,426 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-09-01 14:16:04,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-09-01 14:16:04,472 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-09-01 14:16:04,473 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:16:04,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 10/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-09-01 14:16:04,476 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-09-01 14:16:07,655 INFO L134 LiptonReduction]: Checked pairs total: 2598 [2023-09-01 14:16:07,655 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-09-01 14:16:07,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:16:07,675 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;@4c77707e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:16:07,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 14:16:07,682 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-09-01 14:16:07,682 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:16:07,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:07,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:07,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:07,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1971920350, now seen corresponding path program 1 times [2023-09-01 14:16:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076760268] [2023-09-01 14:16:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:08,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:08,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076760268] [2023-09-01 14:16:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076760268] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:08,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:08,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:16:08,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42302905] [2023-09-01 14:16:08,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:16:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:16:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:16:08,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 222 [2023-09-01 14:16:08,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:08,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:08,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 222 [2023-09-01 14:16:08,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:08,570 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-09-01 14:16:08,571 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2023-09-01 14:16:08,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5850 event pairs, 215 based on Foata normal form. 1/1054 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-09-01 14:16:08,588 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-09-01 14:16:08,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-09-01 14:16:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:16:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:16:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-09-01 14:16:08,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-09-01 14:16:08,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-09-01 14:16:08,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-09-01 14:16:08,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:08,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-09-01 14:16:08,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:08,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:08,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:08,627 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 372 transitions. [2023-09-01 14:16:08,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-09-01 14:16:08,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 14:16:08,635 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-09-01 14:16:08,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-09-01 14:16:08,640 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-09-01 14:16:08,641 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-09-01 14:16:08,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:08,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:08,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:08,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:16:08,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:08,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash 550150448, now seen corresponding path program 1 times [2023-09-01 14:16:08,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:08,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123099840] [2023-09-01 14:16:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:08,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123099840] [2023-09-01 14:16:08,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123099840] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:08,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:08,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:16:08,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788352728] [2023-09-01 14:16:08,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:08,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:16:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:16:08,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:16:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-09-01 14:16:08,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:08,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:08,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-09-01 14:16:08,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:09,346 INFO L130 PetriNetUnfolder]: 1929/2707 cut-off events. [2023-09-01 14:16:09,346 INFO L131 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2023-09-01 14:16:09,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 2707 events. 1929/2707 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12322 event pairs, 489 based on Foata normal form. 304/2995 useless extension candidates. Maximal degree in co-relation 2470. Up to 1349 conditions per place. [2023-09-01 14:16:09,360 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-09-01 14:16:09,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 82 transitions, 384 flow [2023-09-01 14:16:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:16:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:16:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-09-01 14:16:09,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243243243243243 [2023-09-01 14:16:09,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-09-01 14:16:09,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-09-01 14:16:09,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:09,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-09-01 14:16:09,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,370 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,370 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 582 transitions. [2023-09-01 14:16:09,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 82 transitions, 384 flow [2023-09-01 14:16:09,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 82 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:09,374 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 134 flow [2023-09-01 14:16:09,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-09-01 14:16:09,375 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-09-01 14:16:09,375 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 134 flow [2023-09-01 14:16:09,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:09,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:09,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:16:09,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:09,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash -634446788, now seen corresponding path program 2 times [2023-09-01 14:16:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808338566] [2023-09-01 14:16:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:09,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:09,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808338566] [2023-09-01 14:16:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808338566] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:09,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:09,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:16:09,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816800477] [2023-09-01 14:16:09,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:09,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:09,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:09,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:16:09,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:09,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:09,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:09,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:09,855 INFO L130 PetriNetUnfolder]: 1807/2582 cut-off events. [2023-09-01 14:16:09,855 INFO L131 PetriNetUnfolder]: For 2758/3083 co-relation queries the response was YES. [2023-09-01 14:16:09,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 2582 events. 1807/2582 cut-off events. For 2758/3083 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12128 event pairs, 489 based on Foata normal form. 400/2953 useless extension candidates. Maximal degree in co-relation 1682. Up to 1640 conditions per place. [2023-09-01 14:16:09,871 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-09-01 14:16:09,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 381 flow [2023-09-01 14:16:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-09-01 14:16:09,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-09-01 14:16:09,874 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-09-01 14:16:09,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-09-01 14:16:09,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:09,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-09-01 14:16:09,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,878 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 134 flow. Second operand 4 states and 470 transitions. [2023-09-01 14:16:09,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 381 flow [2023-09-01 14:16:09,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 374 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:09,885 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 160 flow [2023-09-01 14:16:09,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-09-01 14:16:09,887 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-09-01 14:16:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 160 flow [2023-09-01 14:16:09,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:09,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:09,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:16:09,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:09,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1967310179, now seen corresponding path program 1 times [2023-09-01 14:16:09,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801500318] [2023-09-01 14:16:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:09,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:10,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:10,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801500318] [2023-09-01 14:16:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801500318] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:10,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:16:10,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394457903] [2023-09-01 14:16:10,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:16:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:16:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:16:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-09-01 14:16:10,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:10,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:10,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-09-01 14:16:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:10,477 INFO L130 PetriNetUnfolder]: 2391/3500 cut-off events. [2023-09-01 14:16:10,477 INFO L131 PetriNetUnfolder]: For 6576/6968 co-relation queries the response was YES. [2023-09-01 14:16:10,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 3500 events. 2391/3500 cut-off events. For 6576/6968 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18396 event pairs, 729 based on Foata normal form. 569/4038 useless extension candidates. Maximal degree in co-relation 4402. Up to 1997 conditions per place. [2023-09-01 14:16:10,499 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 63 selfloop transitions, 5 changer transitions 18/88 dead transitions. [2023-09-01 14:16:10,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 88 transitions, 514 flow [2023-09-01 14:16:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:16:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:16:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-09-01 14:16:10,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216216216216216 [2023-09-01 14:16:10,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-09-01 14:16:10,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-09-01 14:16:10,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:10,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-09-01 14:16:10,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:10,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:10,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:10,508 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 160 flow. Second operand 5 states and 579 transitions. [2023-09-01 14:16:10,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 88 transitions, 514 flow [2023-09-01 14:16:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 509 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:10,517 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 200 flow [2023-09-01 14:16:10,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-09-01 14:16:10,519 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-09-01 14:16:10,519 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 200 flow [2023-09-01 14:16:10,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:10,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:10,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:16:10,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:10,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -630595977, now seen corresponding path program 2 times [2023-09-01 14:16:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687657439] [2023-09-01 14:16:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:10,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:10,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687657439] [2023-09-01 14:16:10,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687657439] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:10,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:10,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:16:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274832816] [2023-09-01 14:16:10,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:10,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:10,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:16:10,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:10,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:10,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:10,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:11,099 INFO L130 PetriNetUnfolder]: 2636/3791 cut-off events. [2023-09-01 14:16:11,100 INFO L131 PetriNetUnfolder]: For 12510/13050 co-relation queries the response was YES. [2023-09-01 14:16:11,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14035 conditions, 3791 events. 2636/3791 cut-off events. For 12510/13050 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19034 event pairs, 704 based on Foata normal form. 474/4113 useless extension candidates. Maximal degree in co-relation 8693. Up to 1833 conditions per place. [2023-09-01 14:16:11,128 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 63 selfloop transitions, 10 changer transitions 1/79 dead transitions. [2023-09-01 14:16:11,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 570 flow [2023-09-01 14:16:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-09-01 14:16:11,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-09-01 14:16:11,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-09-01 14:16:11,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-09-01 14:16:11,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:11,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-09-01 14:16:11,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,135 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,135 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 200 flow. Second operand 4 states and 470 transitions. [2023-09-01 14:16:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 570 flow [2023-09-01 14:16:11,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 549 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 14:16:11,149 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 321 flow [2023-09-01 14:16:11,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-09-01 14:16:11,150 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-09-01 14:16:11,150 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 321 flow [2023-09-01 14:16:11,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:11,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:16:11,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:11,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 373265492, now seen corresponding path program 3 times [2023-09-01 14:16:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191784704] [2023-09-01 14:16:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:11,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:11,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191784704] [2023-09-01 14:16:11,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191784704] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:11,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:11,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:16:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807471161] [2023-09-01 14:16:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:11,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:11,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:16:11,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:11,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:11,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:11,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:11,869 INFO L130 PetriNetUnfolder]: 3959/5512 cut-off events. [2023-09-01 14:16:11,869 INFO L131 PetriNetUnfolder]: For 27139/27835 co-relation queries the response was YES. [2023-09-01 14:16:11,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23963 conditions, 5512 events. 3959/5512 cut-off events. For 27139/27835 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27821 event pairs, 1419 based on Foata normal form. 655/6035 useless extension candidates. Maximal degree in co-relation 11708. Up to 3327 conditions per place. [2023-09-01 14:16:11,910 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 69 selfloop transitions, 19 changer transitions 5/97 dead transitions. [2023-09-01 14:16:11,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 845 flow [2023-09-01 14:16:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-09-01 14:16:11,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304054054054054 [2023-09-01 14:16:11,913 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-09-01 14:16:11,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-09-01 14:16:11,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:11,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-09-01 14:16:11,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,917 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 321 flow. Second operand 4 states and 471 transitions. [2023-09-01 14:16:11,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 845 flow [2023-09-01 14:16:11,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 97 transitions, 810 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:11,944 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 542 flow [2023-09-01 14:16:11,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-09-01 14:16:11,945 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-09-01 14:16:11,946 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 542 flow [2023-09-01 14:16:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:11,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:11,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:16:11,947 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:11,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:11,947 INFO L85 PathProgramCache]: Analyzing trace with hash 913151625, now seen corresponding path program 3 times [2023-09-01 14:16:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750698515] [2023-09-01 14:16:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:11,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:12,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:12,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750698515] [2023-09-01 14:16:12,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750698515] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:12,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:12,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:16:12,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126274955] [2023-09-01 14:16:12,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:12,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:16:12,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:12,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:12,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:12,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:12,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:12,667 INFO L130 PetriNetUnfolder]: 4069/5629 cut-off events. [2023-09-01 14:16:12,667 INFO L131 PetriNetUnfolder]: For 34585/35242 co-relation queries the response was YES. [2023-09-01 14:16:12,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26334 conditions, 5629 events. 4069/5629 cut-off events. For 34585/35242 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28061 event pairs, 1051 based on Foata normal form. 543/6085 useless extension candidates. Maximal degree in co-relation 17951. Up to 4642 conditions per place. [2023-09-01 14:16:12,714 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 70 selfloop transitions, 9 changer transitions 12/95 dead transitions. [2023-09-01 14:16:12,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 932 flow [2023-09-01 14:16:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-09-01 14:16:12,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247747747747747 [2023-09-01 14:16:12,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-09-01 14:16:12,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-09-01 14:16:12,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:12,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-09-01 14:16:12,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:12,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:12,720 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:12,720 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 542 flow. Second operand 4 states and 466 transitions. [2023-09-01 14:16:12,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 932 flow [2023-09-01 14:16:12,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 922 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:12,744 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 588 flow [2023-09-01 14:16:12,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=588, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-09-01 14:16:12,745 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-09-01 14:16:12,745 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 588 flow [2023-09-01 14:16:12,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:12,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:12,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:16:12,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:12,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -254193814, now seen corresponding path program 4 times [2023-09-01 14:16:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:12,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950959964] [2023-09-01 14:16:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:12,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:12,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950959964] [2023-09-01 14:16:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950959964] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:12,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:12,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:16:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601779777] [2023-09-01 14:16:12,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:16:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:16:12,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:16:12,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 222 [2023-09-01 14:16:12,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 588 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:12,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:12,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 222 [2023-09-01 14:16:12,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:13,598 INFO L130 PetriNetUnfolder]: 4191/5821 cut-off events. [2023-09-01 14:16:13,599 INFO L131 PetriNetUnfolder]: For 34875/35391 co-relation queries the response was YES. [2023-09-01 14:16:13,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 5821 events. 4191/5821 cut-off events. For 34875/35391 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29329 event pairs, 1433 based on Foata normal form. 467/6264 useless extension candidates. Maximal degree in co-relation 21531. Up to 4101 conditions per place. [2023-09-01 14:16:13,640 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 87 selfloop transitions, 16 changer transitions 21/126 dead transitions. [2023-09-01 14:16:13,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 126 transitions, 1224 flow [2023-09-01 14:16:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:16:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:16:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 679 transitions. [2023-09-01 14:16:13,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097597597597597 [2023-09-01 14:16:13,644 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 679 transitions. [2023-09-01 14:16:13,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 679 transitions. [2023-09-01 14:16:13,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:13,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 679 transitions. [2023-09-01 14:16:13,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 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) [2023-09-01 14:16:13,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:13,649 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:13,649 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 588 flow. Second operand 6 states and 679 transitions. [2023-09-01 14:16:13,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 126 transitions, 1224 flow [2023-09-01 14:16:13,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 126 transitions, 1176 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-09-01 14:16:13,674 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 691 flow [2023-09-01 14:16:13,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=691, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-09-01 14:16:13,677 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-09-01 14:16:13,677 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 691 flow [2023-09-01 14:16:13,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:13,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:13,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 14:16:13,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:13,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash 48622009, now seen corresponding path program 4 times [2023-09-01 14:16:13,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:13,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186799562] [2023-09-01 14:16:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:13,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:13,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:13,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186799562] [2023-09-01 14:16:13,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186799562] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:13,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:13,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:16:13,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046101224] [2023-09-01 14:16:13,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:13,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:16:13,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:13,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 691 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:13,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:13,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:13,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:14,602 INFO L130 PetriNetUnfolder]: 5266/7366 cut-off events. [2023-09-01 14:16:14,603 INFO L131 PetriNetUnfolder]: For 67702/70243 co-relation queries the response was YES. [2023-09-01 14:16:14,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35154 conditions, 7366 events. 5266/7366 cut-off events. For 67702/70243 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38692 event pairs, 1726 based on Foata normal form. 1773/8952 useless extension candidates. Maximal degree in co-relation 26456. Up to 4880 conditions per place. [2023-09-01 14:16:14,675 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 117 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-09-01 14:16:14,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 129 transitions, 1596 flow [2023-09-01 14:16:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-09-01 14:16:14,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2023-09-01 14:16:14,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-09-01 14:16:14,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-09-01 14:16:14,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:14,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-09-01 14:16:14,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:14,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:14,681 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:14,681 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 691 flow. Second operand 4 states and 464 transitions. [2023-09-01 14:16:14,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 129 transitions, 1596 flow [2023-09-01 14:16:14,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 129 transitions, 1533 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 14:16:14,705 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 809 flow [2023-09-01 14:16:14,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=809, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-09-01 14:16:14,706 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-09-01 14:16:14,706 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 809 flow [2023-09-01 14:16:14,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:14,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:14,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:14,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 14:16:14,707 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:14,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash -234274435, now seen corresponding path program 5 times [2023-09-01 14:16:14,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:14,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519013640] [2023-09-01 14:16:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:14,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:14,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519013640] [2023-09-01 14:16:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519013640] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:14,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:14,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:16:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713222047] [2023-09-01 14:16:14,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:16:14,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:14,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 809 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:14,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:14,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:14,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:15,442 INFO L130 PetriNetUnfolder]: 4779/6700 cut-off events. [2023-09-01 14:16:15,442 INFO L131 PetriNetUnfolder]: For 55435/57405 co-relation queries the response was YES. [2023-09-01 14:16:15,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36636 conditions, 6700 events. 4779/6700 cut-off events. For 55435/57405 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34177 event pairs, 1447 based on Foata normal form. 1495/8061 useless extension candidates. Maximal degree in co-relation 29093. Up to 4406 conditions per place. [2023-09-01 14:16:15,501 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 82 selfloop transitions, 15 changer transitions 12/115 dead transitions. [2023-09-01 14:16:15,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1347 flow [2023-09-01 14:16:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-09-01 14:16:15,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-09-01 14:16:15,504 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-09-01 14:16:15,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-09-01 14:16:15,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:15,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-09-01 14:16:15,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:15,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:15,507 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:15,507 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 809 flow. Second operand 4 states and 470 transitions. [2023-09-01 14:16:15,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1347 flow [2023-09-01 14:16:15,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 1328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:15,545 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 876 flow [2023-09-01 14:16:15,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=876, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-09-01 14:16:15,546 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-09-01 14:16:15,546 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 876 flow [2023-09-01 14:16:15,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:15,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:15,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 14:16:15,547 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:15,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1251327380, now seen corresponding path program 1 times [2023-09-01 14:16:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192898591] [2023-09-01 14:16:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:15,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:15,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192898591] [2023-09-01 14:16:15,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192898591] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:15,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:15,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:16:15,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996017517] [2023-09-01 14:16:15,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:15,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:16:15,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:15,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:16:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:16:15,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-09-01 14:16:15,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 876 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:15,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:15,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-09-01 14:16:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:16,235 INFO L130 PetriNetUnfolder]: 4201/5794 cut-off events. [2023-09-01 14:16:16,236 INFO L131 PetriNetUnfolder]: For 59445/60555 co-relation queries the response was YES. [2023-09-01 14:16:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32881 conditions, 5794 events. 4201/5794 cut-off events. For 59445/60555 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27820 event pairs, 1667 based on Foata normal form. 1024/6763 useless extension candidates. Maximal degree in co-relation 26313. Up to 4049 conditions per place. [2023-09-01 14:16:16,283 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 78 selfloop transitions, 13 changer transitions 18/112 dead transitions. [2023-09-01 14:16:16,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 1365 flow [2023-09-01 14:16:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:16:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:16:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-09-01 14:16:16,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2023-09-01 14:16:16,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-09-01 14:16:16,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-09-01 14:16:16,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:16,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-09-01 14:16:16,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,290 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,290 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 876 flow. Second operand 5 states and 560 transitions. [2023-09-01 14:16:16,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 1365 flow [2023-09-01 14:16:16,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 1304 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 14:16:16,336 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 874 flow [2023-09-01 14:16:16,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-09-01 14:16:16,337 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-09-01 14:16:16,337 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 874 flow [2023-09-01 14:16:16,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:16,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:16,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 14:16:16,338 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:16,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1898023995, now seen corresponding path program 1 times [2023-09-01 14:16:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:16,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816448248] [2023-09-01 14:16:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:16,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:16,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:16,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816448248] [2023-09-01 14:16:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816448248] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:16:16,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:16:16,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:16:16,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179234881] [2023-09-01 14:16:16,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:16,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:16:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:16:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:16:16,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-09-01 14:16:16,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 874 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:16,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-09-01 14:16:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:16,941 INFO L130 PetriNetUnfolder]: 4197/5653 cut-off events. [2023-09-01 14:16:16,941 INFO L131 PetriNetUnfolder]: For 59686/60734 co-relation queries the response was YES. [2023-09-01 14:16:16,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 5653 events. 4197/5653 cut-off events. For 59686/60734 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 25502 event pairs, 1565 based on Foata normal form. 1008/6589 useless extension candidates. Maximal degree in co-relation 30326. Up to 4391 conditions per place. [2023-09-01 14:16:16,985 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 83 selfloop transitions, 29 changer transitions 6/121 dead transitions. [2023-09-01 14:16:16,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 1562 flow [2023-09-01 14:16:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:16:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:16:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-09-01 14:16:16,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063063063063064 [2023-09-01 14:16:16,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-09-01 14:16:16,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-09-01 14:16:16,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:16,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-09-01 14:16:16,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:16,991 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 874 flow. Second operand 5 states and 562 transitions. [2023-09-01 14:16:16,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 1562 flow [2023-09-01 14:16:17,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 1428 flow, removed 52 selfloop flow, removed 4 redundant places. [2023-09-01 14:16:17,045 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 1079 flow [2023-09-01 14:16:17,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-09-01 14:16:17,046 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-09-01 14:16:17,046 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 1079 flow [2023-09-01 14:16:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:17,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:17,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 14:16:17,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:17,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 967516647, now seen corresponding path program 1 times [2023-09-01 14:16:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147446990] [2023-09-01 14:16:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:17,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:17,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147446990] [2023-09-01 14:16:17,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147446990] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497959440] [2023-09-01 14:16:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:17,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:17,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:17,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:16:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:16:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:17,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:17,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497959440] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:17,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:16:17,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-09-01 14:16:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280483547] [2023-09-01 14:16:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:16:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:16:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:16:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:16:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-09-01 14:16:17,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 1079 flow. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:17,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:17,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-09-01 14:16:17,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:18,163 INFO L130 PetriNetUnfolder]: 5554/7244 cut-off events. [2023-09-01 14:16:18,164 INFO L131 PetriNetUnfolder]: For 84222/86425 co-relation queries the response was YES. [2023-09-01 14:16:18,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 7244 events. 5554/7244 cut-off events. For 84222/86425 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31186 event pairs, 1070 based on Foata normal form. 1098/8191 useless extension candidates. Maximal degree in co-relation 36019. Up to 6002 conditions per place. [2023-09-01 14:16:18,228 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 116 selfloop transitions, 19 changer transitions 1/143 dead transitions. [2023-09-01 14:16:18,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 1973 flow [2023-09-01 14:16:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-09-01 14:16:18,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2023-09-01 14:16:18,230 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-09-01 14:16:18,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-09-01 14:16:18,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:18,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-09-01 14:16:18,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:18,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:18,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:18,234 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 1079 flow. Second operand 4 states and 460 transitions. [2023-09-01 14:16:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 1973 flow [2023-09-01 14:16:18,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 1871 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-09-01 14:16:18,276 INFO L231 Difference]: Finished difference. Result has 70 places, 93 transitions, 1158 flow [2023-09-01 14:16:18,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1158, PETRI_PLACES=70, PETRI_TRANSITIONS=93} [2023-09-01 14:16:18,277 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-09-01 14:16:18,277 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 93 transitions, 1158 flow [2023-09-01 14:16:18,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:18,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:18,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:18,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:16:18,483 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,SelfDestructingSolverStorable12 [2023-09-01 14:16:18,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:18,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1526123081, now seen corresponding path program 2 times [2023-09-01 14:16:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762791747] [2023-09-01 14:16:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:16:18,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762791747] [2023-09-01 14:16:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762791747] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907007277] [2023-09-01 14:16:18,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:16:18,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:18,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:18,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:18,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:16:18,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:16:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:16:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:16:18,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:16:18,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:16:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907007277] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:16:18,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:16:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 14:16:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655550215] [2023-09-01 14:16:18,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:16:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:16:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:16:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:16:18,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 222 [2023-09-01 14:16:18,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 93 transitions, 1158 flow. Second operand has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:18,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:18,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 222 [2023-09-01 14:16:18,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:19,898 INFO L130 PetriNetUnfolder]: 6710/8604 cut-off events. [2023-09-01 14:16:19,899 INFO L131 PetriNetUnfolder]: For 104664/105795 co-relation queries the response was YES. [2023-09-01 14:16:19,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 8604 events. 6710/8604 cut-off events. For 104664/105795 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35602 event pairs, 1400 based on Foata normal form. 1197/9756 useless extension candidates. Maximal degree in co-relation 41583. Up to 5421 conditions per place. [2023-09-01 14:16:19,971 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 135 selfloop transitions, 97 changer transitions 2/239 dead transitions. [2023-09-01 14:16:19,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 239 transitions, 3638 flow [2023-09-01 14:16:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:16:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:16:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 669 transitions. [2023-09-01 14:16:19,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022522522522522 [2023-09-01 14:16:19,974 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 669 transitions. [2023-09-01 14:16:19,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 669 transitions. [2023-09-01 14:16:19,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:19,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 669 transitions. [2023-09-01 14:16:19,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.5) internal successors, (669), 6 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:19,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:19,979 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:19,979 INFO L175 Difference]: Start difference. First operand has 70 places, 93 transitions, 1158 flow. Second operand 6 states and 669 transitions. [2023-09-01 14:16:19,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 239 transitions, 3638 flow [2023-09-01 14:16:20,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 3376 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-09-01 14:16:20,054 INFO L231 Difference]: Finished difference. Result has 77 places, 175 transitions, 2755 flow [2023-09-01 14:16:20,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2755, PETRI_PLACES=77, PETRI_TRANSITIONS=175} [2023-09-01 14:16:20,055 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-09-01 14:16:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 175 transitions, 2755 flow [2023-09-01 14:16:20,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:20,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:20,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:20,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:16:20,261 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,SelfDestructingSolverStorable13 [2023-09-01 14:16:20,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:20,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash 423727133, now seen corresponding path program 1 times [2023-09-01 14:16:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111118084] [2023-09-01 14:16:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111118084] [2023-09-01 14:16:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111118084] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396073888] [2023-09-01 14:16:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:20,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:20,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:20,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:20,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:16:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:16:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:20,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396073888] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:16:20,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:16:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-09-01 14:16:20,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612713297] [2023-09-01 14:16:20,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:16:20,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:16:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:16:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:16:20,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 222 [2023-09-01 14:16:20,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 175 transitions, 2755 flow. Second operand has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:20,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:20,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 222 [2023-09-01 14:16:20,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:22,150 INFO L130 PetriNetUnfolder]: 12306/16025 cut-off events. [2023-09-01 14:16:22,150 INFO L131 PetriNetUnfolder]: For 236807/241514 co-relation queries the response was YES. [2023-09-01 14:16:22,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110797 conditions, 16025 events. 12306/16025 cut-off events. For 236807/241514 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 76960 event pairs, 1296 based on Foata normal form. 3116/17982 useless extension candidates. Maximal degree in co-relation 98264. Up to 10285 conditions per place. [2023-09-01 14:16:22,280 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 162 selfloop transitions, 167 changer transitions 3/344 dead transitions. [2023-09-01 14:16:22,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 344 transitions, 5614 flow [2023-09-01 14:16:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:16:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:16:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-09-01 14:16:22,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574324324324325 [2023-09-01 14:16:22,282 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-09-01 14:16:22,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-09-01 14:16:22,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:22,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-09-01 14:16:22,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:22,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:22,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:22,286 INFO L175 Difference]: Start difference. First operand has 77 places, 175 transitions, 2755 flow. Second operand 4 states and 495 transitions. [2023-09-01 14:16:22,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 344 transitions, 5614 flow [2023-09-01 14:16:22,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 344 transitions, 5400 flow, removed 84 selfloop flow, removed 2 redundant places. [2023-09-01 14:16:22,433 INFO L231 Difference]: Finished difference. Result has 79 places, 307 transitions, 5508 flow [2023-09-01 14:16:22,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5508, PETRI_PLACES=79, PETRI_TRANSITIONS=307} [2023-09-01 14:16:22,434 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-09-01 14:16:22,434 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 307 transitions, 5508 flow [2023-09-01 14:16:22,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:22,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:22,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:22,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 14:16:22,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:22,637 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:22,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash 147049617, now seen corresponding path program 2 times [2023-09-01 14:16:22,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:22,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436072851] [2023-09-01 14:16:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:22,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436072851] [2023-09-01 14:16:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436072851] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:22,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448010284] [2023-09-01 14:16:22,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:16:22,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:22,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:22,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:16:22,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:16:22,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:16:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:16:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448010284] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:16:23,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:16:23,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-09-01 14:16:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933344055] [2023-09-01 14:16:23,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:16:23,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:16:23,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:23,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:16:23,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:16:23,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 222 [2023-09-01 14:16:23,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 307 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:23,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:23,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 222 [2023-09-01 14:16:23,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:26,533 INFO L130 PetriNetUnfolder]: 23620/30836 cut-off events. [2023-09-01 14:16:26,533 INFO L131 PetriNetUnfolder]: For 595698/603632 co-relation queries the response was YES. [2023-09-01 14:16:26,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239377 conditions, 30836 events. 23620/30836 cut-off events. For 595698/603632 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 162725 event pairs, 2059 based on Foata normal form. 4919/33922 useless extension candidates. Maximal degree in co-relation 212854. Up to 19599 conditions per place. [2023-09-01 14:16:26,787 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 181 selfloop transitions, 379 changer transitions 3/575 dead transitions. [2023-09-01 14:16:26,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 575 transitions, 10577 flow [2023-09-01 14:16:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:16:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:16:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-09-01 14:16:26,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2023-09-01 14:16:26,790 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-09-01 14:16:26,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-09-01 14:16:26,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:26,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-09-01 14:16:26,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:26,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:26,794 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:26,795 INFO L175 Difference]: Start difference. First operand has 79 places, 307 transitions, 5508 flow. Second operand 5 states and 624 transitions. [2023-09-01 14:16:26,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 575 transitions, 10577 flow [2023-09-01 14:16:27,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 575 transitions, 10383 flow, removed 97 selfloop flow, removed 0 redundant places. [2023-09-01 14:16:27,165 INFO L231 Difference]: Finished difference. Result has 85 places, 519 transitions, 10439 flow [2023-09-01 14:16:27,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10439, PETRI_PLACES=85, PETRI_TRANSITIONS=519} [2023-09-01 14:16:27,166 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-09-01 14:16:27,166 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 519 transitions, 10439 flow [2023-09-01 14:16:27,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:27,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:27,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:27,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 14:16:27,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:16:27,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:27,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash 263795595, now seen corresponding path program 3 times [2023-09-01 14:16:27,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:27,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551322327] [2023-09-01 14:16:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:27,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551322327] [2023-09-01 14:16:27,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551322327] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013708405] [2023-09-01 14:16:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:16:27,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:27,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:27,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:27,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:16:27,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:16:27,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:16:27,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:16:27,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:27,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013708405] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:16:27,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:16:27,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 14:16:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281499410] [2023-09-01 14:16:27,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:16:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:16:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:16:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:16:28,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-09-01 14:16:28,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 519 transitions, 10439 flow. Second operand has 14 states, 14 states have (on average 100.92857142857143) internal successors, (1413), 14 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:28,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:28,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-09-01 14:16:28,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:43,883 INFO L130 PetriNetUnfolder]: 73165/99419 cut-off events. [2023-09-01 14:16:43,884 INFO L131 PetriNetUnfolder]: For 1652660/1658110 co-relation queries the response was YES. [2023-09-01 14:16:44,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736479 conditions, 99419 events. 73165/99419 cut-off events. For 1652660/1658110 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 647629 event pairs, 2626 based on Foata normal form. 7292/106701 useless extension candidates. Maximal degree in co-relation 696923. Up to 41573 conditions per place. [2023-09-01 14:16:44,655 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 2496 selfloop transitions, 935 changer transitions 0/3434 dead transitions. [2023-09-01 14:16:44,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 3434 transitions, 69490 flow [2023-09-01 14:16:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 14:16:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 14:16:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5120 transitions. [2023-09-01 14:16:44,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907034694268737 [2023-09-01 14:16:44,668 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5120 transitions. [2023-09-01 14:16:44,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5120 transitions. [2023-09-01 14:16:44,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:44,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5120 transitions. [2023-09-01 14:16:44,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 108.93617021276596) internal successors, (5120), 47 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:44,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:44,699 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:44,700 INFO L175 Difference]: Start difference. First operand has 85 places, 519 transitions, 10439 flow. Second operand 47 states and 5120 transitions. [2023-09-01 14:16:44,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 3434 transitions, 69490 flow [2023-09-01 14:16:50,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 3434 transitions, 65338 flow, removed 2076 selfloop flow, removed 0 redundant places. [2023-09-01 14:16:50,798 INFO L231 Difference]: Finished difference. Result has 169 places, 1477 transitions, 31404 flow [2023-09-01 14:16:50,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=9821, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31404, PETRI_PLACES=169, PETRI_TRANSITIONS=1477} [2023-09-01 14:16:50,799 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2023-09-01 14:16:50,799 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 1477 transitions, 31404 flow [2023-09-01 14:16:50,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 100.92857142857143) internal successors, (1413), 14 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:50,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:50,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:50,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:16:51,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:16:51,005 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:16:51,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -560273567, now seen corresponding path program 4 times [2023-09-01 14:16:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:51,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995941389] [2023-09-01 14:16:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:16:51,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995941389] [2023-09-01 14:16:51,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995941389] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729005540] [2023-09-01 14:16:51,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:16:51,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:51,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:51,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:16:51,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:16:51,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:16:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:16:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:16:51,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:16:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729005540] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:16:51,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:16:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 14:16:51,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695291071] [2023-09-01 14:16:51,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:16:51,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:16:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:16:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:16:51,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-09-01 14:16:51,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 1477 transitions, 31404 flow. Second operand has 14 states, 14 states have (on average 99.28571428571429) internal successors, (1390), 14 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:16:51,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:16:51,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-09-01 14:16:51,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:05,823 INFO L130 PetriNetUnfolder]: 182421/252798 cut-off events. [2023-09-01 14:18:05,824 INFO L131 PetriNetUnfolder]: For 7924589/7928551 co-relation queries the response was YES. [2023-09-01 14:18:08,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2305237 conditions, 252798 events. 182421/252798 cut-off events. For 7924589/7928551 co-relation queries the response was YES. Maximal size of possible extension queue 9717. Compared 1890504 event pairs, 7429 based on Foata normal form. 8952/261746 useless extension candidates. Maximal degree in co-relation 2174794. Up to 91989 conditions per place. [2023-09-01 14:18:09,532 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 4077 selfloop transitions, 2849 changer transitions 108/7052 dead transitions. [2023-09-01 14:18:09,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 7052 transitions, 157459 flow [2023-09-01 14:18:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-09-01 14:18:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-09-01 14:18:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 8104 transitions. [2023-09-01 14:18:09,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48672672672672673 [2023-09-01 14:18:09,546 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 8104 transitions. [2023-09-01 14:18:09,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 8104 transitions. [2023-09-01 14:18:09,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:09,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 8104 transitions. [2023-09-01 14:18:09,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 108.05333333333333) internal successors, (8104), 75 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:09,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:09,584 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:09,585 INFO L175 Difference]: Start difference. First operand has 169 places, 1477 transitions, 31404 flow. Second operand 75 states and 8104 transitions. [2023-09-01 14:18:09,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 7052 transitions, 157459 flow Killed by 15