./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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 ../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:03:21,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:03:21,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:03:21,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:03:21,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:03:21,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:03:21,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:03:21,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:03:21,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:03:21,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:03:21,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:03:21,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:03:21,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:03:21,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:03:21,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:03:21,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:03:21,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:03:21,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:03:21,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:03:21,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:03:21,701 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:03:21,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:03:21,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:03:21,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:03:21,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:03:21,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:03:21,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:03:21,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:03:21,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:03:21,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:03:21,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:03:21,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:03:21,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:03:21,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:03:21,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:03:21,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:03:21,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:03:21,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:03:21,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:03:21,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:03:21,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:03:21,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:03:21,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:03:21,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:03:21,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:03:21,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:03:21,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:03:21,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:03:21,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:03:21,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:03:21,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:03:21,738 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:03:21,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:03:21,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:03:21,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:03:21,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:03:21,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:03:21,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:03:21,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:03:21,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:03:21,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:03:21,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:03:21,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:03:21,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:03:21,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:03:21,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:03:21,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:03:21,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:03:21,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:03:21,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:03:21,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:03:21,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:03:21,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:03:21,742 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:03:21,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:03:21,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:03:21,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2022-07-12 10:03:21,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:03:22,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:03:22,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:03:22,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:03:22,019 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:03:22,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-07-12 10:03:22,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cbd32a3/ce23cc9747e047549de23ba00104f260/FLAGed809da1a [2022-07-12 10:03:22,450 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:03:22,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-07-12 10:03:22,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cbd32a3/ce23cc9747e047549de23ba00104f260/FLAGed809da1a [2022-07-12 10:03:22,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cbd32a3/ce23cc9747e047549de23ba00104f260 [2022-07-12 10:03:22,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:03:22,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:03:22,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:03:22,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:03:22,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:03:22,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:22,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da7121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22, skipping insertion in model container [2022-07-12 10:03:22,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:22,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:03:22,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:03:23,151 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-07-12 10:03:23,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:03:23,171 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:03:23,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-07-12 10:03:23,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:03:23,279 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:03:23,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23 WrapperNode [2022-07-12 10:03:23,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:03:23,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:03:23,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:03:23,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:03:23,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,353 INFO L137 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 125 [2022-07-12 10:03:23,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:03:23,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:03:23,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:03:23,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:03:23,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:03:23,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:03:23,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:03:23,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:03:23,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (1/1) ... [2022-07-12 10:03:23,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:03:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:03:23,411 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) [2022-07-12 10:03:23,413 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 [2022-07-12 10:03:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:03:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-12 10:03:23,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-12 10:03:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:03:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:03:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:03:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:03:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:03:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:03:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:03:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:03:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:03:23,440 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:03:23,552 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:03:23,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:03:23,768 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:03:23,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:03:23,850 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:03:23,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:23 BoogieIcfgContainer [2022-07-12 10:03:23,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:03:23,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:03:23,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:03:23,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:03:23,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:03:22" (1/3) ... [2022-07-12 10:03:23,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73209cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:03:23, skipping insertion in model container [2022-07-12 10:03:23,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:23" (2/3) ... [2022-07-12 10:03:23,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73209cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:03:23, skipping insertion in model container [2022-07-12 10:03:23,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:23" (3/3) ... [2022-07-12 10:03:23,873 INFO L111 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2022-07-12 10:03:23,885 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:03:23,894 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:03:23,895 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:03:23,895 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:03:23,951 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:23,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2022-07-12 10:03:24,021 INFO L129 PetriNetUnfolder]: 6/90 cut-off events. [2022-07-12 10:03:24,021 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:24,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 6/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-12 10:03:24,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2022-07-12 10:03:24,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 166 flow [2022-07-12 10:03:24,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:24,046 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6147fc06, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73df9c76 [2022-07-12 10:03:24,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:03:24,055 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-07-12 10:03:24,055 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:24,056 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:24,056 INFO L200 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] [2022-07-12 10:03:24,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:03:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash 125568587, now seen corresponding path program 1 times [2022-07-12 10:03:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:24,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880250389] [2022-07-12 10:03:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:24,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880250389] [2022-07-12 10:03:24,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880250389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:24,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:24,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:03:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767798594] [2022-07-12 10:03:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:24,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:03:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:03:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:03:24,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 80 [2022-07-12 10:03:24,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-07-12 10:03:24,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:24,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 80 [2022-07-12 10:03:24,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:24,450 INFO L129 PetriNetUnfolder]: 61/211 cut-off events. [2022-07-12 10:03:24,451 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:03:24,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 211 events. 61/211 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 574 event pairs, 17 based on Foata normal form. 102/296 useless extension candidates. Maximal degree in co-relation 321. Up to 100 conditions per place. [2022-07-12 10:03:24,455 INFO L132 encePairwiseOnDemand]: 72/80 looper letters, 20 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2022-07-12 10:03:24,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 190 flow [2022-07-12 10:03:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:03:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:03:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-07-12 10:03:24,469 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8208333333333333 [2022-07-12 10:03:24,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-07-12 10:03:24,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-07-12 10:03:24,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:24,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-07-12 10:03:24,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2022-07-12 10:03:24,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2022-07-12 10:03:24,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2022-07-12 10:03:24,483 INFO L186 Difference]: Start difference. First operand has 80 places, 79 transitions, 166 flow. Second operand 3 states and 197 transitions. [2022-07-12 10:03:24,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 190 flow [2022-07-12 10:03:24,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:24,490 INFO L242 Difference]: Finished difference. Result has 72 places, 66 transitions, 147 flow [2022-07-12 10:03:24,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2022-07-12 10:03:24,495 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, -8 predicate places. [2022-07-12 10:03:24,495 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 147 flow [2022-07-12 10:03:24,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-07-12 10:03:24,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:24,496 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-07-12 10:03:24,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:03:24,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:03:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1533918423, now seen corresponding path program 1 times [2022-07-12 10:03:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:24,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749292050] [2022-07-12 10:03:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:24,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:24,524 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:24,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:24,597 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:24,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:03:24,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:03:24,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-12 10:03:24,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:03:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:03:24,601 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:03:24,604 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:24,604 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:03:24,659 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:24,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 122 transitions, 268 flow [2022-07-12 10:03:24,680 INFO L129 PetriNetUnfolder]: 8/131 cut-off events. [2022-07-12 10:03:24,680 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:03:24,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 131 events. 8/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 140. Up to 6 conditions per place. [2022-07-12 10:03:24,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 122 transitions, 268 flow [2022-07-12 10:03:24,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 107 transitions, 229 flow [2022-07-12 10:03:24,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:24,691 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6147fc06, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73df9c76 [2022-07-12 10:03:24,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:03:24,696 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-07-12 10:03:24,698 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:24,699 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:24,699 INFO L200 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] [2022-07-12 10:03:24,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:03:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2007188311, now seen corresponding path program 1 times [2022-07-12 10:03:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125593958] [2022-07-12 10:03:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125593958] [2022-07-12 10:03:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125593958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:24,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:24,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:03:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283887425] [2022-07-12 10:03:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:03:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:03:24,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:03:24,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 122 [2022-07-12 10:03:24,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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) [2022-07-12 10:03:24,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:24,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 122 [2022-07-12 10:03:24,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:25,326 INFO L129 PetriNetUnfolder]: 1665/3238 cut-off events. [2022-07-12 10:03:25,327 INFO L130 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2022-07-12 10:03:25,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6006 conditions, 3238 events. 1665/3238 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20522 event pairs, 672 based on Foata normal form. 1436/4484 useless extension candidates. Maximal degree in co-relation 5975. Up to 2444 conditions per place. [2022-07-12 10:03:25,366 INFO L132 encePairwiseOnDemand]: 113/122 looper letters, 39 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2022-07-12 10:03:25,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 312 flow [2022-07-12 10:03:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:03:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:03:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2022-07-12 10:03:25,373 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7568306010928961 [2022-07-12 10:03:25,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2022-07-12 10:03:25,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2022-07-12 10:03:25,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:25,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2022-07-12 10:03:25,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2022-07-12 10:03:25,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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) [2022-07-12 10:03:25,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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) [2022-07-12 10:03:25,382 INFO L186 Difference]: Start difference. First operand has 109 places, 107 transitions, 229 flow. Second operand 3 states and 277 transitions. [2022-07-12 10:03:25,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 312 flow [2022-07-12 10:03:25,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 309 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:25,386 INFO L242 Difference]: Finished difference. Result has 101 places, 96 transitions, 219 flow [2022-07-12 10:03:25,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2022-07-12 10:03:25,387 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -8 predicate places. [2022-07-12 10:03:25,387 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 219 flow [2022-07-12 10:03:25,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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) [2022-07-12 10:03:25,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:25,388 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:25,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:03:25,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:03:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1650657833, now seen corresponding path program 1 times [2022-07-12 10:03:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:25,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578919128] [2022-07-12 10:03:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:25,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:25,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578919128] [2022-07-12 10:03:25,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578919128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:25,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:25,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:03:25,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28875613] [2022-07-12 10:03:25,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:25,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:03:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:25,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:03:25,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:03:25,527 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 122 [2022-07-12 10:03:25,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 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) [2022-07-12 10:03:25,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:25,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 122 [2022-07-12 10:03:25,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:26,267 INFO L129 PetriNetUnfolder]: 2348/4410 cut-off events. [2022-07-12 10:03:26,267 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-12 10:03:26,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8672 conditions, 4410 events. 2348/4410 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 28839 event pairs, 690 based on Foata normal form. 42/4428 useless extension candidates. Maximal degree in co-relation 8639. Up to 2752 conditions per place. [2022-07-12 10:03:26,321 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 85 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2022-07-12 10:03:26,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 162 transitions, 586 flow [2022-07-12 10:03:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:03:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:03:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-12 10:03:26,324 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7201405152224825 [2022-07-12 10:03:26,324 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-12 10:03:26,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-12 10:03:26,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:26,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-12 10:03:26,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 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) [2022-07-12 10:03:26,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 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) [2022-07-12 10:03:26,331 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 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) [2022-07-12 10:03:26,331 INFO L186 Difference]: Start difference. First operand has 101 places, 96 transitions, 219 flow. Second operand 7 states and 615 transitions. [2022-07-12 10:03:26,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 162 transitions, 586 flow [2022-07-12 10:03:26,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 162 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:26,339 INFO L242 Difference]: Finished difference. Result has 110 places, 110 transitions, 335 flow [2022-07-12 10:03:26,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=110, PETRI_TRANSITIONS=110} [2022-07-12 10:03:26,342 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2022-07-12 10:03:26,342 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 110 transitions, 335 flow [2022-07-12 10:03:26,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 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) [2022-07-12 10:03:26,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:26,343 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 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] [2022-07-12 10:03:26,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:03:26,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:03:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 657906234, now seen corresponding path program 1 times [2022-07-12 10:03:26,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:26,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144818530] [2022-07-12 10:03:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:26,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:26,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:26,390 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:26,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:03:26,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:03:26,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-12 10:03:26,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:03:26,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:03:26,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:03:26,391 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:03:26,392 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:26,392 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:03:26,434 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:26,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 165 places, 164 transitions, 370 flow [2022-07-12 10:03:26,457 INFO L129 PetriNetUnfolder]: 10/172 cut-off events. [2022-07-12 10:03:26,457 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:03:26,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 172 events. 10/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 414 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2022-07-12 10:03:26,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 164 transitions, 370 flow [2022-07-12 10:03:26,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 135 transitions, 294 flow [2022-07-12 10:03:26,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:26,463 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6147fc06, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73df9c76 [2022-07-12 10:03:26,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:03:26,467 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2022-07-12 10:03:26,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:26,467 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:26,468 INFO L200 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] [2022-07-12 10:03:26,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:03:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash 967602458, now seen corresponding path program 1 times [2022-07-12 10:03:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:26,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127949567] [2022-07-12 10:03:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:26,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127949567] [2022-07-12 10:03:26,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127949567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:26,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:26,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:03:26,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483804482] [2022-07-12 10:03:26,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:03:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:03:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:03:26,501 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 164 [2022-07-12 10:03:26,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 135 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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) [2022-07-12 10:03:26,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:26,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 164 [2022-07-12 10:03:26,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:32,718 INFO L129 PetriNetUnfolder]: 32840/53020 cut-off events. [2022-07-12 10:03:32,719 INFO L130 PetriNetUnfolder]: For 5209/5209 co-relation queries the response was YES. [2022-07-12 10:03:33,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101267 conditions, 53020 events. 32840/53020 cut-off events. For 5209/5209 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 441001 event pairs, 16590 based on Foata normal form. 18958/69584 useless extension candidates. Maximal degree in co-relation 101235. Up to 44217 conditions per place. [2022-07-12 10:03:33,324 INFO L132 encePairwiseOnDemand]: 154/164 looper letters, 55 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2022-07-12 10:03:33,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 136 transitions, 426 flow [2022-07-12 10:03:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:03:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:03:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2022-07-12 10:03:33,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7195121951219512 [2022-07-12 10:03:33,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2022-07-12 10:03:33,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2022-07-12 10:03:33,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:33,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2022-07-12 10:03:33,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2022-07-12 10:03:33,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 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) [2022-07-12 10:03:33,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 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) [2022-07-12 10:03:33,329 INFO L186 Difference]: Start difference. First operand has 138 places, 135 transitions, 294 flow. Second operand 3 states and 354 transitions. [2022-07-12 10:03:33,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 136 transitions, 426 flow [2022-07-12 10:03:33,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 136 transitions, 417 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:33,335 INFO L242 Difference]: Finished difference. Result has 130 places, 125 transitions, 287 flow [2022-07-12 10:03:33,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2022-07-12 10:03:33,336 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, -8 predicate places. [2022-07-12 10:03:33,336 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 287 flow [2022-07-12 10:03:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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) [2022-07-12 10:03:33,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:33,337 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:03:33,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:03:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1745396355, now seen corresponding path program 1 times [2022-07-12 10:03:33,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:33,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658992331] [2022-07-12 10:03:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:33,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:33,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:33,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658992331] [2022-07-12 10:03:33,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658992331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:33,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:33,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:03:33,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460591822] [2022-07-12 10:03:33,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:33,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:03:33,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:03:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:03:33,417 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 164 [2022-07-12 10:03:33,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 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) [2022-07-12 10:03:33,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:33,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 164 [2022-07-12 10:03:33,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:40,404 INFO L129 PetriNetUnfolder]: 49463/78236 cut-off events. [2022-07-12 10:03:40,404 INFO L130 PetriNetUnfolder]: For 10424/10424 co-relation queries the response was YES. [2022-07-12 10:03:40,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156806 conditions, 78236 events. 49463/78236 cut-off events. For 10424/10424 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 660636 event pairs, 18896 based on Foata normal form. 549/78708 useless extension candidates. Maximal degree in co-relation 156772. Up to 53003 conditions per place. [2022-07-12 10:03:41,407 INFO L132 encePairwiseOnDemand]: 150/164 looper letters, 138 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2022-07-12 10:03:41,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 240 transitions, 914 flow [2022-07-12 10:03:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:03:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:03:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 818 transitions. [2022-07-12 10:03:41,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7125435540069687 [2022-07-12 10:03:41,411 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 818 transitions. [2022-07-12 10:03:41,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 818 transitions. [2022-07-12 10:03:41,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:41,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 818 transitions. [2022-07-12 10:03:41,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.85714285714286) internal successors, (818), 7 states have internal predecessors, (818), 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) [2022-07-12 10:03:41,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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) [2022-07-12 10:03:41,417 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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) [2022-07-12 10:03:41,418 INFO L186 Difference]: Start difference. First operand has 130 places, 125 transitions, 287 flow. Second operand 7 states and 818 transitions. [2022-07-12 10:03:41,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 240 transitions, 914 flow [2022-07-12 10:03:41,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 240 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:41,428 INFO L242 Difference]: Finished difference. Result has 139 places, 148 transitions, 478 flow [2022-07-12 10:03:41,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=478, PETRI_PLACES=139, PETRI_TRANSITIONS=148} [2022-07-12 10:03:41,430 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 1 predicate places. [2022-07-12 10:03:41,433 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 148 transitions, 478 flow [2022-07-12 10:03:41,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 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) [2022-07-12 10:03:41,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:41,434 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:41,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:03:41,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:03:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:41,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1775861579, now seen corresponding path program 1 times [2022-07-12 10:03:41,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:41,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950456829] [2022-07-12 10:03:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:41,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950456829] [2022-07-12 10:03:41,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950456829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:41,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:41,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:03:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72613753] [2022-07-12 10:03:41,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:41,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:03:41,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:03:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:03:41,531 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 164 [2022-07-12 10:03:41,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 148 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 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) [2022-07-12 10:03:41,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:41,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 164 [2022-07-12 10:03:41,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:51,837 INFO L129 PetriNetUnfolder]: 67933/105578 cut-off events. [2022-07-12 10:03:51,837 INFO L130 PetriNetUnfolder]: For 62524/62524 co-relation queries the response was YES. [2022-07-12 10:03:52,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259239 conditions, 105578 events. 67933/105578 cut-off events. For 62524/62524 co-relation queries the response was YES. Maximal size of possible extension queue 2910. Compared 906835 event pairs, 18659 based on Foata normal form. 915/106355 useless extension candidates. Maximal degree in co-relation 259200. Up to 57697 conditions per place. [2022-07-12 10:03:53,210 INFO L132 encePairwiseOnDemand]: 147/164 looper letters, 233 selfloop transitions, 56 changer transitions 0/363 dead transitions. [2022-07-12 10:03:53,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 363 transitions, 1752 flow [2022-07-12 10:03:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:03:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:03:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1303 transitions. [2022-07-12 10:03:53,215 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7222838137472284 [2022-07-12 10:03:53,216 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1303 transitions. [2022-07-12 10:03:53,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1303 transitions. [2022-07-12 10:03:53,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:53,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1303 transitions. [2022-07-12 10:03:53,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.45454545454545) internal successors, (1303), 11 states have internal predecessors, (1303), 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) [2022-07-12 10:03:53,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 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) [2022-07-12 10:03:53,223 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 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) [2022-07-12 10:03:53,223 INFO L186 Difference]: Start difference. First operand has 139 places, 148 transitions, 478 flow. Second operand 11 states and 1303 transitions. [2022-07-12 10:03:53,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 363 transitions, 1752 flow [2022-07-12 10:03:53,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 363 transitions, 1734 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:53,311 INFO L242 Difference]: Finished difference. Result has 152 places, 177 transitions, 825 flow [2022-07-12 10:03:53,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=825, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2022-07-12 10:03:53,312 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 14 predicate places. [2022-07-12 10:03:53,312 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 825 flow [2022-07-12 10:03:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 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) [2022-07-12 10:03:53,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:53,313 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:53,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:03:53,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:03:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1928957350, now seen corresponding path program 1 times [2022-07-12 10:03:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:53,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766932865] [2022-07-12 10:03:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:03:53,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:53,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766932865] [2022-07-12 10:03:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766932865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:53,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:53,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:03:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097952521] [2022-07-12 10:03:53,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:53,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:03:53,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:03:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:03:53,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 164 [2022-07-12 10:03:53,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 825 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2022-07-12 10:03:53,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:53,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 164 [2022-07-12 10:03:53,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand