./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-C-DAC/pthread-demo-datarace-2.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 8dedc3ea8e96f333d418860556906c8618bbf50be75cff10b45de6d34fe23444 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:09:26,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:09:26,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:09:26,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:09:26,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:09:26,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:09:26,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:09:26,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:09:26,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:09:26,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:09:26,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:09:26,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:09:26,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:09:26,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:09:26,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:09:26,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:09:26,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:09:26,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:09:26,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:09:26,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:09:26,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:09:26,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:09:26,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:09:26,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:09:26,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:09:26,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:09:26,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:09:26,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:09:26,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:09:26,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:09:26,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:09:26,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:09:26,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:09:26,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:09:26,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:09:26,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:09:26,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:09:26,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:09:26,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:09:26,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:09:26,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:09:26,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:09:26,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:09:26,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:09:26,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:09:26,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:09:26,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:09:26,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:09:26,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:09:26,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:09:26,750 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:09:26,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:09:26,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:09:26,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:09:26,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:09:26,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:09:26,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:09:26,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:09:26,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:09:26,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:09:26,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:09:26,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:09:26,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:09:26,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:09:26,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:09:26,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:09:26,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:09:26,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:09:26,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:09:26,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:09:26,754 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dedc3ea8e96f333d418860556906c8618bbf50be75cff10b45de6d34fe23444 [2021-12-21 15:09:26,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:09:26,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:09:26,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:09:26,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:09:26,955 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:09:26,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-2.i [2021-12-21 15:09:27,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ffc47cff/fb32c291061247f39d03ea0bb1f0c100/FLAG460d53966 [2021-12-21 15:09:27,416 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:09:27,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-2.i [2021-12-21 15:09:27,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ffc47cff/fb32c291061247f39d03ea0bb1f0c100/FLAG460d53966 [2021-12-21 15:09:27,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ffc47cff/fb32c291061247f39d03ea0bb1f0c100 [2021-12-21 15:09:27,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:09:27,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:09:27,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:09:27,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:09:27,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:09:27,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:09:27" (1/1) ... [2021-12-21 15:09:27,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c960266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:27, skipping insertion in model container [2021-12-21 15:09:27,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:09:27" (1/1) ... [2021-12-21 15:09:27,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:09:27,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:09:27,947 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-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-12-21 15:09:28,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:09:28,179 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:09:28,186 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-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-12-21 15:09:28,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:09:28,251 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:09:28,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28 WrapperNode [2021-12-21 15:09:28,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:09:28,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:09:28,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:09:28,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:09:28,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,303 INFO L137 Inliner]: procedures = 363, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2021-12-21 15:09:28,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:09:28,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:09:28,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:09:28,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:09:28,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:09:28,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:09:28,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:09:28,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:09:28,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (1/1) ... [2021-12-21 15:09:28,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:09:28,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:28,371 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) [2021-12-21 15:09:28,383 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 [2021-12-21 15:09:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:09:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:09:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:09:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-12-21 15:09:28,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-12-21 15:09:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:09:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:09:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:09:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:09:28,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:09:28,403 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:09:28,505 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:09:28,516 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:09:28,652 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:09:28,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:09:28,658 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:09:28,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:09:28 BoogieIcfgContainer [2021-12-21 15:09:28,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:09:28,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:09:28,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:09:28,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:09:28,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:09:27" (1/3) ... [2021-12-21 15:09:28,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee41938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:09:28, skipping insertion in model container [2021-12-21 15:09:28,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:09:28" (2/3) ... [2021-12-21 15:09:28,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee41938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:09:28, skipping insertion in model container [2021-12-21 15:09:28,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:09:28" (3/3) ... [2021-12-21 15:09:28,667 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-12-21 15:09:28,670 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:09:28,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:09:28,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:09:28,671 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:09:28,694 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,695 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,695 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,695 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,695 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,696 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,696 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,696 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,696 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,697 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,697 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,697 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,697 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,698 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,698 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,698 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,699 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,700 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,700 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,700 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,701 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,701 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,701 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,702 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,702 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,703 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,703 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,703 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,703 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,704 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,704 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,704 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,704 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,705 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,705 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,705 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,705 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,705 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,706 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,706 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,706 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,706 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,709 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,709 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,709 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,710 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,710 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,710 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,710 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,710 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:09:28,714 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-21 15:09:28,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:09:28,771 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:09:28,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 15:09:28,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 97 places, 100 transitions, 208 flow [2021-12-21 15:09:28,816 INFO L129 PetriNetUnfolder]: 7/99 cut-off events. [2021-12-21 15:09:28,816 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-21 15:09:28,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 7/99 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-12-21 15:09:28,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 100 transitions, 208 flow [2021-12-21 15:09:28,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 87 transitions, 180 flow [2021-12-21 15:09:28,847 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2021-12-21 15:09:28,847 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-21 15:09:28,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:28,848 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:28,863 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:28,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1260448811, now seen corresponding path program 1 times [2021-12-21 15:09:28,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544053606] [2021-12-21 15:09:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:28,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:09:29,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:29,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544053606] [2021-12-21 15:09:29,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544053606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:09:29,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:09:29,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:09:29,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297325665] [2021-12-21 15:09:29,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:09:29,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:09:29,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:09:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:09:29,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 100 [2021-12-21 15:09:29,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-21 15:09:29,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:29,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 100 [2021-12-21 15:09:29,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:29,128 INFO L129 PetriNetUnfolder]: 2/81 cut-off events. [2021-12-21 15:09:29,128 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-21 15:09:29,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 2/81 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2021-12-21 15:09:29,131 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 2 selfloop transitions, 0 changer transitions 0/81 dead transitions. [2021-12-21 15:09:29,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 172 flow [2021-12-21 15:09:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:09:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:09:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 186 transitions. [2021-12-21 15:09:29,141 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.93 [2021-12-21 15:09:29,142 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 186 transitions. [2021-12-21 15:09:29,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 186 transitions. [2021-12-21 15:09:29,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:29,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 186 transitions. [2021-12-21 15:09:29,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.0) internal successors, (186), 2 states have internal predecessors, (186), 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) [2021-12-21 15:09:29,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2021-12-21 15:09:29,152 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2021-12-21 15:09:29,153 INFO L186 Difference]: Start difference. First operand has 85 places, 87 transitions, 180 flow. Second operand 2 states and 186 transitions. [2021-12-21 15:09:29,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 172 flow [2021-12-21 15:09:29,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-21 15:09:29,160 INFO L242 Difference]: Finished difference. Result has 82 places, 81 transitions, 164 flow [2021-12-21 15:09:29,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2021-12-21 15:09:29,169 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2021-12-21 15:09:29,170 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 164 flow [2021-12-21 15:09:29,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-21 15:09:29,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:29,171 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:29,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:09:29,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:29,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2128438445, now seen corresponding path program 1 times [2021-12-21 15:09:29,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:29,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560916603] [2021-12-21 15:09:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:29,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:09:29,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:29,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560916603] [2021-12-21 15:09:29,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560916603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:09:29,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:09:29,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:09:29,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581863805] [2021-12-21 15:09:29,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:09:29,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:09:29,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:29,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:09:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:09:29,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2021-12-21 15:09:29,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-12-21 15:09:29,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:29,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2021-12-21 15:09:29,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:29,335 INFO L129 PetriNetUnfolder]: 2/85 cut-off events. [2021-12-21 15:09:29,336 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-21 15:09:29,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 85 events. 2/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2021-12-21 15:09:29,337 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 10 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2021-12-21 15:09:29,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 194 flow [2021-12-21 15:09:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:09:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:09:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2021-12-21 15:09:29,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-12-21 15:09:29,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2021-12-21 15:09:29,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2021-12-21 15:09:29,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:29,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2021-12-21 15:09:29,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2021-12-21 15:09:29,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2021-12-21 15:09:29,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2021-12-21 15:09:29,343 INFO L186 Difference]: Start difference. First operand has 82 places, 81 transitions, 164 flow. Second operand 3 states and 262 transitions. [2021-12-21 15:09:29,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 194 flow [2021-12-21 15:09:29,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:09:29,345 INFO L242 Difference]: Finished difference. Result has 85 places, 82 transitions, 176 flow [2021-12-21 15:09:29,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2021-12-21 15:09:29,346 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 0 predicate places. [2021-12-21 15:09:29,346 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 176 flow [2021-12-21 15:09:29,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-12-21 15:09:29,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:29,347 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:29,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:09:29,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1554204240, now seen corresponding path program 1 times [2021-12-21 15:09:29,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:29,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129984865] [2021-12-21 15:09:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:29,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:09:29,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129984865] [2021-12-21 15:09:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129984865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59708737] [2021-12-21 15:09:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:29,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:29,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:29,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:09:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 15:09:29,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:09:29,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:09:29,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59708737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:09:29,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:09:29,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 15:09:29,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556786311] [2021-12-21 15:09:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:09:29,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:09:29,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:09:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:09:29,694 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 100 [2021-12-21 15:09:29,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2021-12-21 15:09:29,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:29,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 100 [2021-12-21 15:09:29,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:29,727 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2021-12-21 15:09:29,727 INFO L130 PetriNetUnfolder]: For 2/9 co-relation queries the response was YES. [2021-12-21 15:09:29,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 92 events. 2/92 cut-off events. For 2/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 109. Up to 9 conditions per place. [2021-12-21 15:09:29,729 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 9 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2021-12-21 15:09:29,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 204 flow [2021-12-21 15:09:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:09:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:09:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2021-12-21 15:09:29,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.88 [2021-12-21 15:09:29,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2021-12-21 15:09:29,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2021-12-21 15:09:29,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:29,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2021-12-21 15:09:29,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2021-12-21 15:09:29,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2021-12-21 15:09:29,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2021-12-21 15:09:29,739 INFO L186 Difference]: Start difference. First operand has 85 places, 82 transitions, 176 flow. Second operand 3 states and 264 transitions. [2021-12-21 15:09:29,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 204 flow [2021-12-21 15:09:29,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:09:29,741 INFO L242 Difference]: Finished difference. Result has 87 places, 83 transitions, 186 flow [2021-12-21 15:09:29,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2021-12-21 15:09:29,741 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 2 predicate places. [2021-12-21 15:09:29,741 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 186 flow [2021-12-21 15:09:29,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2021-12-21 15:09:29,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:29,742 INFO L254 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, 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] [2021-12-21 15:09:29,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 15:09:29,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:29,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1764280257, now seen corresponding path program 1 times [2021-12-21 15:09:29,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495480253] [2021-12-21 15:09:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:29,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:09:29,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495480253] [2021-12-21 15:09:29,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495480253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619682657] [2021-12-21 15:09:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:29,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:29,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:09:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 15:09:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:09:30,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:09:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:09:30,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619682657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:09:30,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:09:30,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-21 15:09:30,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384093600] [2021-12-21 15:09:30,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:09:30,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:09:30,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:09:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:09:30,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2021-12-21 15:09:30,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 84.9) internal successors, (849), 10 states have internal predecessors, (849), 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) [2021-12-21 15:09:30,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:30,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2021-12-21 15:09:30,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:30,438 INFO L129 PetriNetUnfolder]: 2/102 cut-off events. [2021-12-21 15:09:30,438 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-21 15:09:30,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 102 events. 2/102 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 131. Up to 7 conditions per place. [2021-12-21 15:09:30,439 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 9 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2021-12-21 15:09:30,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 240 flow [2021-12-21 15:09:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:09:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:09:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 767 transitions. [2021-12-21 15:09:30,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8522222222222222 [2021-12-21 15:09:30,442 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 767 transitions. [2021-12-21 15:09:30,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 767 transitions. [2021-12-21 15:09:30,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:30,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 767 transitions. [2021-12-21 15:09:30,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 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) [2021-12-21 15:09:30,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2021-12-21 15:09:30,446 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2021-12-21 15:09:30,446 INFO L186 Difference]: Start difference. First operand has 87 places, 83 transitions, 186 flow. Second operand 9 states and 767 transitions. [2021-12-21 15:09:30,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 240 flow [2021-12-21 15:09:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:09:30,448 INFO L242 Difference]: Finished difference. Result has 97 places, 89 transitions, 234 flow [2021-12-21 15:09:30,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2021-12-21 15:09:30,449 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 12 predicate places. [2021-12-21 15:09:30,449 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 234 flow [2021-12-21 15:09:30,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.9) internal successors, (849), 10 states have internal predecessors, (849), 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) [2021-12-21 15:09:30,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:30,450 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:30,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:09:30,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 15:09:30,668 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1547231883, now seen corresponding path program 2 times [2021-12-21 15:09:30,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:30,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082383364] [2021-12-21 15:09:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:30,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 15:09:30,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082383364] [2021-12-21 15:09:30,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082383364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591978206] [2021-12-21 15:09:30,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:09:30,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:30,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:30,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:09:30,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:09:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:09:30,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 15:09:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 15:09:30,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:09:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 15:09:31,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591978206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:09:31,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:09:31,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-21 15:09:31,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179258761] [2021-12-21 15:09:31,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:09:31,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:09:31,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:09:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:09:31,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2021-12-21 15:09:31,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 234 flow. Second operand has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 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) [2021-12-21 15:09:31,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:31,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2021-12-21 15:09:31,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:31,114 INFO L129 PetriNetUnfolder]: 2/109 cut-off events. [2021-12-21 15:09:31,114 INFO L130 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2021-12-21 15:09:31,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 109 events. 2/109 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2021-12-21 15:09:31,116 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 10 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2021-12-21 15:09:31,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 97 transitions, 290 flow [2021-12-21 15:09:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:09:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:09:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 759 transitions. [2021-12-21 15:09:31,119 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8433333333333334 [2021-12-21 15:09:31,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 759 transitions. [2021-12-21 15:09:31,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 759 transitions. [2021-12-21 15:09:31,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:31,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 759 transitions. [2021-12-21 15:09:31,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.33333333333333) internal successors, (759), 9 states have internal predecessors, (759), 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) [2021-12-21 15:09:31,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2021-12-21 15:09:31,123 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2021-12-21 15:09:31,123 INFO L186 Difference]: Start difference. First operand has 97 places, 89 transitions, 234 flow. Second operand 9 states and 759 transitions. [2021-12-21 15:09:31,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 97 transitions, 290 flow [2021-12-21 15:09:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 97 transitions, 284 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-21 15:09:31,126 INFO L242 Difference]: Finished difference. Result has 107 places, 95 transitions, 278 flow [2021-12-21 15:09:31,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2021-12-21 15:09:31,126 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 22 predicate places. [2021-12-21 15:09:31,126 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 278 flow [2021-12-21 15:09:31,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 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) [2021-12-21 15:09:31,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:31,127 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:31,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:09:31,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:31,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash 885541253, now seen corresponding path program 3 times [2021-12-21 15:09:31,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:31,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525575319] [2021-12-21 15:09:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:31,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 15:09:31,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:31,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525575319] [2021-12-21 15:09:31,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525575319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369752435] [2021-12-21 15:09:31,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:09:31,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:31,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:31,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:31,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:09:31,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 15:09:31,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:09:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:09:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 15:09:31,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:09:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 15:09:31,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369752435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:09:31,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:09:31,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-21 15:09:31,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036944441] [2021-12-21 15:09:31,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:09:31,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 15:09:31,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 15:09:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-12-21 15:09:31,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2021-12-21 15:09:31,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 278 flow. Second operand has 23 states, 23 states have (on average 77.6086956521739) internal successors, (1785), 23 states have internal predecessors, (1785), 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) [2021-12-21 15:09:31,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:31,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2021-12-21 15:09:31,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:35,860 INFO L129 PetriNetUnfolder]: 673/1895 cut-off events. [2021-12-21 15:09:35,860 INFO L130 PetriNetUnfolder]: For 2216/2216 co-relation queries the response was YES. [2021-12-21 15:09:35,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5373 conditions, 1895 events. 673/1895 cut-off events. For 2216/2216 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 10425 event pairs, 20 based on Foata normal form. 116/2008 useless extension candidates. Maximal degree in co-relation 5362. Up to 231 conditions per place. [2021-12-21 15:09:35,872 INFO L132 encePairwiseOnDemand]: 89/100 looper letters, 325 selfloop transitions, 451 changer transitions 0/840 dead transitions. [2021-12-21 15:09:35,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 840 transitions, 5686 flow [2021-12-21 15:09:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-12-21 15:09:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-12-21 15:09:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 17415 transitions. [2021-12-21 15:09:35,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7880090497737556 [2021-12-21 15:09:35,892 INFO L72 ComplementDD]: Start complementDD. Operand 221 states and 17415 transitions. [2021-12-21 15:09:35,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 17415 transitions. [2021-12-21 15:09:35,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:35,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 221 states and 17415 transitions. [2021-12-21 15:09:35,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 222 states, 221 states have (on average 78.80090497737557) internal successors, (17415), 221 states have internal predecessors, (17415), 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) [2021-12-21 15:09:35,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 222 states, 222 states have (on average 100.0) internal successors, (22200), 222 states have internal predecessors, (22200), 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) [2021-12-21 15:09:35,995 INFO L81 ComplementDD]: Finished complementDD. Result has 222 states, 222 states have (on average 100.0) internal successors, (22200), 222 states have internal predecessors, (22200), 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) [2021-12-21 15:09:35,995 INFO L186 Difference]: Start difference. First operand has 107 places, 95 transitions, 278 flow. Second operand 221 states and 17415 transitions. [2021-12-21 15:09:35,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 840 transitions, 5686 flow [2021-12-21 15:09:36,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 840 transitions, 5486 flow, removed 80 selfloop flow, removed 1 redundant places. [2021-12-21 15:09:36,013 INFO L242 Difference]: Finished difference. Result has 426 places, 570 transitions, 4232 flow [2021-12-21 15:09:36,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=221, PETRI_FLOW=4232, PETRI_PLACES=426, PETRI_TRANSITIONS=570} [2021-12-21 15:09:36,014 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 341 predicate places. [2021-12-21 15:09:36,014 INFO L470 AbstractCegarLoop]: Abstraction has has 426 places, 570 transitions, 4232 flow [2021-12-21 15:09:36,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.6086956521739) internal successors, (1785), 23 states have internal predecessors, (1785), 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) [2021-12-21 15:09:36,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:36,015 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:36,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:09:36,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:36,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1162091128, now seen corresponding path program 4 times [2021-12-21 15:09:36,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685521881] [2021-12-21 15:09:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:36,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-21 15:09:36,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685521881] [2021-12-21 15:09:36,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685521881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671726702] [2021-12-21 15:09:36,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:09:36,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:36,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:36,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:09:36,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:09:36,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:09:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 15:09:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-21 15:09:36,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:09:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-21 15:09:36,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671726702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:09:36,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:09:36,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-21 15:09:36,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817839124] [2021-12-21 15:09:36,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:09:36,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 15:09:36,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 15:09:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-12-21 15:09:36,871 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2021-12-21 15:09:36,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 570 transitions, 4232 flow. Second operand has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 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) [2021-12-21 15:09:36,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:36,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2021-12-21 15:09:36,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:37,387 INFO L129 PetriNetUnfolder]: 471/1649 cut-off events. [2021-12-21 15:09:37,387 INFO L130 PetriNetUnfolder]: For 65295/66199 co-relation queries the response was YES. [2021-12-21 15:09:37,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9626 conditions, 1649 events. 471/1649 cut-off events. For 65295/66199 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10226 event pairs, 75 based on Foata normal form. 228/1812 useless extension candidates. Maximal degree in co-relation 9515. Up to 261 conditions per place. [2021-12-21 15:09:37,461 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 16 selfloop transitions, 331 changer transitions 0/668 dead transitions. [2021-12-21 15:09:37,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 668 transitions, 6050 flow [2021-12-21 15:09:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:09:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:09:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2262 transitions. [2021-12-21 15:09:37,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8377777777777777 [2021-12-21 15:09:37,464 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2262 transitions. [2021-12-21 15:09:37,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2262 transitions. [2021-12-21 15:09:37,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:37,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2262 transitions. [2021-12-21 15:09:37,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 83.77777777777777) internal successors, (2262), 27 states have internal predecessors, (2262), 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) [2021-12-21 15:09:37,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 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) [2021-12-21 15:09:37,473 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 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) [2021-12-21 15:09:37,473 INFO L186 Difference]: Start difference. First operand has 426 places, 570 transitions, 4232 flow. Second operand 27 states and 2262 transitions. [2021-12-21 15:09:37,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 668 transitions, 6050 flow [2021-12-21 15:09:37,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 668 transitions, 5466 flow, removed 106 selfloop flow, removed 12 redundant places. [2021-12-21 15:09:37,707 INFO L242 Difference]: Finished difference. Result has 446 places, 661 transitions, 5483 flow [2021-12-21 15:09:37,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5483, PETRI_PLACES=446, PETRI_TRANSITIONS=661} [2021-12-21 15:09:37,708 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 361 predicate places. [2021-12-21 15:09:37,708 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 661 transitions, 5483 flow [2021-12-21 15:09:37,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 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) [2021-12-21 15:09:37,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:37,709 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:37,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:09:37,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:37,923 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1778070953, now seen corresponding path program 5 times [2021-12-21 15:09:37,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:37,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129848545] [2021-12-21 15:09:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:37,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 102 proven. 175 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-21 15:09:38,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129848545] [2021-12-21 15:09:38,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129848545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435746980] [2021-12-21 15:09:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:09:38,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:38,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:38,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:09:38,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-21 15:09:38,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:09:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 15:09:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 102 proven. 175 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-21 15:09:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:09:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 102 proven. 175 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-21 15:09:38,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435746980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:09:38,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:09:38,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2021-12-21 15:09:38,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533681590] [2021-12-21 15:09:38,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:09:38,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 15:09:38,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 15:09:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 15:09:38,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2021-12-21 15:09:38,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 661 transitions, 5483 flow. Second operand has 34 states, 34 states have (on average 84.97058823529412) internal successors, (2889), 34 states have internal predecessors, (2889), 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) [2021-12-21 15:09:38,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:38,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2021-12-21 15:09:38,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:09:39,996 INFO L129 PetriNetUnfolder]: 983/3364 cut-off events. [2021-12-21 15:09:39,996 INFO L130 PetriNetUnfolder]: For 251035/252527 co-relation queries the response was YES. [2021-12-21 15:09:40,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16107 conditions, 3364 events. 983/3364 cut-off events. For 251035/252527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 23534 event pairs, 155 based on Foata normal form. 98/3392 useless extension candidates. Maximal degree in co-relation 15990. Up to 524 conditions per place. [2021-12-21 15:09:40,045 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 121 selfloop transitions, 495 changer transitions 0/1018 dead transitions. [2021-12-21 15:09:40,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1018 transitions, 9447 flow [2021-12-21 15:09:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-21 15:09:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-21 15:09:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3809 transitions. [2021-12-21 15:09:40,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8464444444444444 [2021-12-21 15:09:40,049 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3809 transitions. [2021-12-21 15:09:40,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3809 transitions. [2021-12-21 15:09:40,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:09:40,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3809 transitions. [2021-12-21 15:09:40,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 84.64444444444445) internal successors, (3809), 45 states have internal predecessors, (3809), 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) [2021-12-21 15:09:40,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 100.0) internal successors, (4600), 46 states have internal predecessors, (4600), 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) [2021-12-21 15:09:40,059 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 100.0) internal successors, (4600), 46 states have internal predecessors, (4600), 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) [2021-12-21 15:09:40,059 INFO L186 Difference]: Start difference. First operand has 446 places, 661 transitions, 5483 flow. Second operand 45 states and 3809 transitions. [2021-12-21 15:09:40,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1018 transitions, 9447 flow [2021-12-21 15:09:40,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1018 transitions, 8595 flow, removed 186 selfloop flow, removed 39 redundant places. [2021-12-21 15:09:40,395 INFO L242 Difference]: Finished difference. Result has 460 places, 936 transitions, 7793 flow [2021-12-21 15:09:40,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4631, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7793, PETRI_PLACES=460, PETRI_TRANSITIONS=936} [2021-12-21 15:09:40,398 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 375 predicate places. [2021-12-21 15:09:40,398 INFO L470 AbstractCegarLoop]: Abstraction has has 460 places, 936 transitions, 7793 flow [2021-12-21 15:09:40,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 84.97058823529412) internal successors, (2889), 34 states have internal predecessors, (2889), 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) [2021-12-21 15:09:40,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:09:40,399 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:09:40,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 15:09:40,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:40,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-21 15:09:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:09:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 816486975, now seen corresponding path program 6 times [2021-12-21 15:09:40,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:09:40,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815178498] [2021-12-21 15:09:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:09:40,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:09:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:09:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 102 proven. 855 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-21 15:09:41,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:09:41,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815178498] [2021-12-21 15:09:41,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815178498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:09:41,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914243552] [2021-12-21 15:09:41,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:09:41,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:09:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:09:41,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:09:41,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:09:41,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-21 15:09:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:09:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:09:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:09:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-12-21 15:09:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:09:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-12-21 15:09:42,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914243552] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:09:42,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:09:42,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 21] total 71 [2021-12-21 15:09:42,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037124423] [2021-12-21 15:09:42,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:09:42,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-21 15:09:42,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:09:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-21 15:09:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=4263, Unknown=0, NotChecked=0, Total=4970 [2021-12-21 15:09:42,548 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2021-12-21 15:09:42,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 936 transitions, 7793 flow. Second operand has 71 states, 71 states have (on average 77.30985915492958) internal successors, (5489), 71 states have internal predecessors, (5489), 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) [2021-12-21 15:09:42,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:09:42,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2021-12-21 15:09:42,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand