./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.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 b6d5da741db538e8728209fa456d0dc9c63ceba5521dacbaf062bafc94e3da01 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:46:02,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:46:02,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:46:02,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:46:02,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:46:02,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:46:02,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:46:02,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:46:02,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:46:02,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:46:02,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:46:02,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:46:02,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:46:02,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:46:02,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:46:02,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:46:02,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:46:02,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:46:02,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:46:02,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:46:02,710 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:46:02,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:46:02,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:46:02,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:46:02,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:46:02,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:46:02,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:46:02,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:46:02,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:46:02,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:46:02,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:46:02,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:46:02,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:46:02,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:46:02,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:46:02,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:46:02,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:46:02,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:46:02,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:46:02,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:46:02,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:46:02,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:46:02,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:46:02,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:46:02,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:46:02,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:46:02,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:46:02,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:46:02,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:46:02,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:46:02,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:46:02,768 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:46:02,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:46:02,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:46:02,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:46:02,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:46:02,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:46:02,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:46:02,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:46:02,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:46:02,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:46:02,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:46:02,771 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:46:02,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:46:02,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:46:02,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:46:02,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:46:02,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:46:02,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:46:02,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:46:02,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:46:02,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:46:02,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:46:02,773 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:46:02,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:46:02,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:46:02,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6d5da741db538e8728209fa456d0dc9c63ceba5521dacbaf062bafc94e3da01 [2022-07-12 10:46:03,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:46:03,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:46:03,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:46:03,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:46:03,058 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:46:03,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i [2022-07-12 10:46:03,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44881d1be/507e6e3d72e54b8e8d9a72f5d2aa18ad/FLAGfbacfad8f [2022-07-12 10:46:03,527 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:46:03,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i [2022-07-12 10:46:03,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44881d1be/507e6e3d72e54b8e8d9a72f5d2aa18ad/FLAGfbacfad8f [2022-07-12 10:46:03,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44881d1be/507e6e3d72e54b8e8d9a72f5d2aa18ad [2022-07-12 10:46:03,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:46:03,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:46:03,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:46:03,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:46:03,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:46:03,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:46:03" (1/1) ... [2022-07-12 10:46:03,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2566fad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:03, skipping insertion in model container [2022-07-12 10:46:03,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:46:03" (1/1) ... [2022-07-12 10:46:03,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:46:03,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:46:03,941 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-deagle/reorder_c11_bad-40.i[30190,30203] [2022-07-12 10:46:03,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:46:03,968 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:46:04,007 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-deagle/reorder_c11_bad-40.i[30190,30203] [2022-07-12 10:46:04,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:46:04,059 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:46:04,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04 WrapperNode [2022-07-12 10:46:04,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:46:04,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:46:04,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:46:04,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:46:04,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,116 INFO L137 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-07-12 10:46:04,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:46:04,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:46:04,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:46:04,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:46:04,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:46:04,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:46:04,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:46:04,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:46:04,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (1/1) ... [2022-07-12 10:46:04,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:46:04,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:46:04,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:46:04,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:46:04,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:46:04,215 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-07-12 10:46:04,215 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-07-12 10:46:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:46:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:46:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:46:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:46:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:46:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-07-12 10:46:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-07-12 10:46:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:46:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:46:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:46:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:46:04,219 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:46:04,301 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:46:04,303 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:46:04,489 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:46:04,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:46:04,495 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:46:04,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:46:04 BoogieIcfgContainer [2022-07-12 10:46:04,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:46:04,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:46:04,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:46:04,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:46:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:46:03" (1/3) ... [2022-07-12 10:46:04,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348e030e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:46:04, skipping insertion in model container [2022-07-12 10:46:04,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:46:04" (2/3) ... [2022-07-12 10:46:04,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348e030e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:46:04, skipping insertion in model container [2022-07-12 10:46:04,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:46:04" (3/3) ... [2022-07-12 10:46:04,505 INFO L111 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-40.i [2022-07-12 10:46:04,509 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:46:04,518 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:46:04,518 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:46:04,518 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:46:04,576 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:46:04,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 204 flow [2022-07-12 10:46:04,686 INFO L129 PetriNetUnfolder]: 24/202 cut-off events. [2022-07-12 10:46:04,687 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:46:04,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 202 events. 24/202 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 627 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2022-07-12 10:46:04,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 204 flow [2022-07-12 10:46:04,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 89 transitions, 194 flow [2022-07-12 10:46:04,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:46:04,718 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6df16d46, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15b439ee [2022-07-12 10:46:04,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:46:04,738 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2022-07-12 10:46:04,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:46:04,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:04,742 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:04,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:46:04,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash -211201094, now seen corresponding path program 1 times [2022-07-12 10:46:04,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439723591] [2022-07-12 10:46:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:04,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:04,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:04,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439723591] [2022-07-12 10:46:04,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439723591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:04,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:04,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:46:04,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116828817] [2022-07-12 10:46:04,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:04,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:46:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:46:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:46:05,013 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 91 [2022-07-12 10:46:05,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:05,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 91 [2022-07-12 10:46:05,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:05,057 INFO L129 PetriNetUnfolder]: 4/172 cut-off events. [2022-07-12 10:46:05,057 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:46:05,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 172 events. 4/172 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 546 event pairs, 0 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2022-07-12 10:46:05,059 INFO L132 encePairwiseOnDemand]: 86/91 looper letters, 4 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-07-12 10:46:05,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 190 flow [2022-07-12 10:46:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:46:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:46:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 167 transitions. [2022-07-12 10:46:05,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9175824175824175 [2022-07-12 10:46:05,071 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 167 transitions. [2022-07-12 10:46:05,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 167 transitions. [2022-07-12 10:46:05,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:05,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 167 transitions. [2022-07-12 10:46:05,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,081 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,082 INFO L186 Difference]: Start difference. First operand has 87 places, 89 transitions, 194 flow. Second operand 2 states and 167 transitions. [2022-07-12 10:46:05,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 190 flow [2022-07-12 10:46:05,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:05,094 INFO L242 Difference]: Finished difference. Result has 87 places, 83 transitions, 182 flow [2022-07-12 10:46:05,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2022-07-12 10:46:05,101 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 0 predicate places. [2022-07-12 10:46:05,102 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 182 flow [2022-07-12 10:46:05,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:05,103 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:46:05,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:46:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash -407714599, now seen corresponding path program 1 times [2022-07-12 10:46:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616868126] [2022-07-12 10:46:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:05,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:05,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616868126] [2022-07-12 10:46:05,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616868126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:05,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:05,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:46:05,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830003957] [2022-07-12 10:46:05,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:05,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:46:05,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:46:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:46:05,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 91 [2022-07-12 10:46:05,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:05,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 91 [2022-07-12 10:46:05,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:05,232 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2022-07-12 10:46:05,233 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:46:05,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 80 events. 0/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:46:05,233 INFO L132 encePairwiseOnDemand]: 80/91 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-07-12 10:46:05,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 227 flow [2022-07-12 10:46:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:46:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:46:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-07-12 10:46:05,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7216117216117216 [2022-07-12 10:46:05,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-07-12 10:46:05,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-07-12 10:46:05,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:05,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-07-12 10:46:05,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,240 INFO L186 Difference]: Start difference. First operand has 87 places, 83 transitions, 182 flow. Second operand 3 states and 197 transitions. [2022-07-12 10:46:05,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 227 flow [2022-07-12 10:46:05,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:05,243 INFO L242 Difference]: Finished difference. Result has 78 places, 70 transitions, 180 flow [2022-07-12 10:46:05,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-07-12 10:46:05,244 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2022-07-12 10:46:05,244 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 180 flow [2022-07-12 10:46:05,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:05,245 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:05,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:46:05,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:46:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash -121871665, now seen corresponding path program 1 times [2022-07-12 10:46:05,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:05,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357486765] [2022-07-12 10:46:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:46:05,283 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:46:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:46:05,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:46:05,324 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:46:05,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:46:05,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:46:05,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-12 10:46:05,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:46:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:46:05,327 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:46:05,329 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:46:05,329 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:46:05,357 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-12 10:46:05,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 268 flow [2022-07-12 10:46:05,511 INFO L129 PetriNetUnfolder]: 107/656 cut-off events. [2022-07-12 10:46:05,512 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-12 10:46:05,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 656 events. 107/656 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3182 event pairs, 2 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2022-07-12 10:46:05,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 110 transitions, 268 flow [2022-07-12 10:46:05,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 110 transitions, 268 flow [2022-07-12 10:46:05,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:46:05,536 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6df16d46, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15b439ee [2022-07-12 10:46:05,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:46:05,542 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-07-12 10:46:05,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:46:05,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:05,543 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:05,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:46:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash -537588368, now seen corresponding path program 1 times [2022-07-12 10:46:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824389627] [2022-07-12 10:46:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:05,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:05,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824389627] [2022-07-12 10:46:05,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824389627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:05,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:05,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:46:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703858057] [2022-07-12 10:46:05,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:05,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:46:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:46:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:46:05,646 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2022-07-12 10:46:05,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:05,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2022-07-12 10:46:05,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:05,842 INFO L129 PetriNetUnfolder]: 58/575 cut-off events. [2022-07-12 10:46:05,843 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-12 10:46:05,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 575 events. 58/575 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2884 event pairs, 0 based on Foata normal form. 244/783 useless extension candidates. Maximal degree in co-relation 505. Up to 207 conditions per place. [2022-07-12 10:46:05,846 INFO L132 encePairwiseOnDemand]: 92/110 looper letters, 53 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2022-07-12 10:46:05,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 446 flow [2022-07-12 10:46:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:46:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:46:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-07-12 10:46:05,852 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8242424242424242 [2022-07-12 10:46:05,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-07-12 10:46:05,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-07-12 10:46:05,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:05,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-07-12 10:46:05,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,858 INFO L186 Difference]: Start difference. First operand has 105 places, 110 transitions, 268 flow. Second operand 3 states and 272 transitions. [2022-07-12 10:46:05,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 446 flow [2022-07-12 10:46:05,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 126 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:05,867 INFO L242 Difference]: Finished difference. Result has 106 places, 106 transitions, 300 flow [2022-07-12 10:46:05,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=106, PETRI_TRANSITIONS=106} [2022-07-12 10:46:05,869 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 1 predicate places. [2022-07-12 10:46:05,870 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 106 transitions, 300 flow [2022-07-12 10:46:05,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:05,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:05,870 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:46:05,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:46:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash 853052668, now seen corresponding path program 1 times [2022-07-12 10:46:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89725744] [2022-07-12 10:46:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89725744] [2022-07-12 10:46:05,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89725744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:46:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728273175] [2022-07-12 10:46:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:05,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:05,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:46:05,980 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) [2022-07-12 10:46:05,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:46:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:46:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:46:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:06,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:46:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:06,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728273175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:46:06,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:46:06,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:46:06,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045544392] [2022-07-12 10:46:06,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:46:06,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:46:06,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:46:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:46:06,213 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 110 [2022-07-12 10:46:06,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 300 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:06,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:06,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 110 [2022-07-12 10:46:06,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:06,285 INFO L129 PetriNetUnfolder]: 0/57 cut-off events. [2022-07-12 10:46:06,285 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:46:06,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 57 events. 0/57 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:46:06,286 INFO L132 encePairwiseOnDemand]: 105/110 looper letters, 10 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-07-12 10:46:06,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 156 flow [2022-07-12 10:46:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:46:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:46:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 586 transitions. [2022-07-12 10:46:06,288 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.591919191919192 [2022-07-12 10:46:06,288 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 586 transitions. [2022-07-12 10:46:06,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 586 transitions. [2022-07-12 10:46:06,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:06,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 586 transitions. [2022-07-12 10:46:06,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.11111111111111) internal successors, (586), 9 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:06,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:06,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:06,293 INFO L186 Difference]: Start difference. First operand has 106 places, 106 transitions, 300 flow. Second operand 9 states and 586 transitions. [2022-07-12 10:46:06,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 156 flow [2022-07-12 10:46:06,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:46:06,296 INFO L242 Difference]: Finished difference. Result has 61 places, 47 transitions, 124 flow [2022-07-12 10:46:06,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2022-07-12 10:46:06,296 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, -44 predicate places. [2022-07-12 10:46:06,297 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 124 flow [2022-07-12 10:46:06,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:06,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:06,298 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:06,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:46:06,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:06,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:46:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1479036618, now seen corresponding path program 1 times [2022-07-12 10:46:06,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050665462] [2022-07-12 10:46:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:46:06,546 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:46:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:46:06,570 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:46:06,570 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:46:06,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:46:06,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:46:06,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-12 10:46:06,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:46:06,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:46:06,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:46:06,572 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:46:06,572 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:46:06,572 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:46:06,592 INFO L135 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-07-12 10:46:06,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 336 flow [2022-07-12 10:46:06,836 INFO L129 PetriNetUnfolder]: 496/2280 cut-off events. [2022-07-12 10:46:06,836 INFO L130 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-07-12 10:46:06,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 2280 events. 496/2280 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 15128 event pairs, 64 based on Foata normal form. 0/1960 useless extension candidates. Maximal degree in co-relation 1399. Up to 192 conditions per place. [2022-07-12 10:46:06,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 336 flow [2022-07-12 10:46:06,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 129 transitions, 336 flow [2022-07-12 10:46:06,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:46:06,869 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6df16d46, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15b439ee [2022-07-12 10:46:06,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:46:06,873 INFO L129 PetriNetUnfolder]: 4/62 cut-off events. [2022-07-12 10:46:06,873 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:46:06,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:06,874 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:06,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:46:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1295698664, now seen corresponding path program 1 times [2022-07-12 10:46:06,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:06,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947288023] [2022-07-12 10:46:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:06,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:06,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947288023] [2022-07-12 10:46:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947288023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:06,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:46:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510538416] [2022-07-12 10:46:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:06,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:46:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:46:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:46:06,907 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 129 [2022-07-12 10:46:06,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 336 flow. Second operand has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:06,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:06,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 129 [2022-07-12 10:46:06,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:07,216 INFO L129 PetriNetUnfolder]: 336/2108 cut-off events. [2022-07-12 10:46:07,217 INFO L130 PetriNetUnfolder]: For 1217/1217 co-relation queries the response was YES. [2022-07-12 10:46:07,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 2108 events. 336/2108 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14809 event pairs, 32 based on Foata normal form. 358/2306 useless extension candidates. Maximal degree in co-relation 1473. Up to 400 conditions per place. [2022-07-12 10:46:07,233 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 18 selfloop transitions, 0 changer transitions 0/119 dead transitions. [2022-07-12 10:46:07,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 119 transitions, 352 flow [2022-07-12 10:46:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:46:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:46:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2022-07-12 10:46:07,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8798449612403101 [2022-07-12 10:46:07,238 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2022-07-12 10:46:07,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2022-07-12 10:46:07,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:07,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2022-07-12 10:46:07,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,242 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,242 INFO L186 Difference]: Start difference. First operand has 123 places, 129 transitions, 336 flow. Second operand 2 states and 227 transitions. [2022-07-12 10:46:07,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 119 transitions, 352 flow [2022-07-12 10:46:07,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:07,248 INFO L242 Difference]: Finished difference. Result has 121 places, 119 transitions, 316 flow [2022-07-12 10:46:07,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=316, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2022-07-12 10:46:07,249 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2022-07-12 10:46:07,249 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 316 flow [2022-07-12 10:46:07,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:07,249 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:07,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:46:07,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:46:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1099185159, now seen corresponding path program 1 times [2022-07-12 10:46:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:07,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039625231] [2022-07-12 10:46:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:07,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039625231] [2022-07-12 10:46:07,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039625231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:07,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:07,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:46:07,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090105709] [2022-07-12 10:46:07,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:46:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:46:07,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:46:07,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 129 [2022-07-12 10:46:07,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:07,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 129 [2022-07-12 10:46:07,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:07,738 INFO L129 PetriNetUnfolder]: 444/2469 cut-off events. [2022-07-12 10:46:07,738 INFO L130 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-07-12 10:46:07,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2469 events. 444/2469 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19458 event pairs, 10 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 4682. Up to 1054 conditions per place. [2022-07-12 10:46:07,755 INFO L132 encePairwiseOnDemand]: 117/129 looper letters, 63 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2022-07-12 10:46:07,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 147 transitions, 550 flow [2022-07-12 10:46:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:46:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:46:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2022-07-12 10:46:07,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7829457364341085 [2022-07-12 10:46:07,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2022-07-12 10:46:07,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2022-07-12 10:46:07,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:07,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2022-07-12 10:46:07,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,769 INFO L186 Difference]: Start difference. First operand has 121 places, 119 transitions, 316 flow. Second operand 3 states and 303 transitions. [2022-07-12 10:46:07,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 147 transitions, 550 flow [2022-07-12 10:46:07,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:07,776 INFO L242 Difference]: Finished difference. Result has 124 places, 123 transitions, 364 flow [2022-07-12 10:46:07,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=124, PETRI_TRANSITIONS=123} [2022-07-12 10:46:07,778 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2022-07-12 10:46:07,778 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 123 transitions, 364 flow [2022-07-12 10:46:07,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:07,779 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:07,779 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:07,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:46:07,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:46:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash -524673210, now seen corresponding path program 1 times [2022-07-12 10:46:07,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:07,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589463522] [2022-07-12 10:46:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:07,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:07,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589463522] [2022-07-12 10:46:07,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589463522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:46:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871617699] [2022-07-12 10:46:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:07,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:07,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:46:07,838 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) [2022-07-12 10:46:07,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:46:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:46:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:46:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:07,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:46:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:08,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871617699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:46:08,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:46:08,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:46:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677695018] [2022-07-12 10:46:08,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:46:08,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:46:08,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:46:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:46:08,005 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2022-07-12 10:46:08,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 123 transitions, 364 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:08,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:08,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2022-07-12 10:46:08,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:08,542 INFO L129 PetriNetUnfolder]: 423/2263 cut-off events. [2022-07-12 10:46:08,543 INFO L130 PetriNetUnfolder]: For 683/683 co-relation queries the response was YES. [2022-07-12 10:46:08,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 2263 events. 423/2263 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17592 event pairs, 35 based on Foata normal form. 2/2262 useless extension candidates. Maximal degree in co-relation 4761. Up to 482 conditions per place. [2022-07-12 10:46:08,564 INFO L132 encePairwiseOnDemand]: 114/129 looper letters, 59 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2022-07-12 10:46:08,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 154 transitions, 624 flow [2022-07-12 10:46:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:46:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:46:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 822 transitions. [2022-07-12 10:46:08,567 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2022-07-12 10:46:08,568 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 822 transitions. [2022-07-12 10:46:08,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 822 transitions. [2022-07-12 10:46:08,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:08,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 822 transitions. [2022-07-12 10:46:08,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 82.2) internal successors, (822), 10 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:08,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:08,573 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:08,573 INFO L186 Difference]: Start difference. First operand has 124 places, 123 transitions, 364 flow. Second operand 10 states and 822 transitions. [2022-07-12 10:46:08,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 154 transitions, 624 flow [2022-07-12 10:46:08,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 154 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:46:08,579 INFO L242 Difference]: Finished difference. Result has 135 places, 132 transitions, 456 flow [2022-07-12 10:46:08,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-07-12 10:46:08,582 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 12 predicate places. [2022-07-12 10:46:08,582 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 456 flow [2022-07-12 10:46:08,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:08,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:08,583 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-07-12 10:46:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:46:08,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 10:46:08,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:46:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash 531540147, now seen corresponding path program 1 times [2022-07-12 10:46:08,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:08,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47375611] [2022-07-12 10:46:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:08,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:46:08,827 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:46:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:46:08,875 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:46:08,879 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:46:08,879 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:46:08,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:46:08,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-12 10:46:08,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:46:08,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:46:08,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:46:08,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:46:08,881 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:46:08,882 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:46:08,882 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:46:08,918 INFO L135 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-07-12 10:46:08,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 408 flow [2022-07-12 10:46:10,032 INFO L129 PetriNetUnfolder]: 2379/8746 cut-off events. [2022-07-12 10:46:10,033 INFO L130 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-07-12 10:46:10,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 8746 events. 2379/8746 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 74995 event pairs, 626 based on Foata normal form. 0/7622 useless extension candidates. Maximal degree in co-relation 5388. Up to 1024 conditions per place. [2022-07-12 10:46:10,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 148 transitions, 408 flow [2022-07-12 10:46:10,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 148 transitions, 408 flow [2022-07-12 10:46:10,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:46:10,215 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6df16d46, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15b439ee [2022-07-12 10:46:10,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:46:10,220 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2022-07-12 10:46:10,220 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:46:10,220 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:10,220 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:10,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:46:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash 404176023, now seen corresponding path program 1 times [2022-07-12 10:46:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:10,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918538863] [2022-07-12 10:46:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:10,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918538863] [2022-07-12 10:46:10,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918538863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:10,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:10,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:46:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507941813] [2022-07-12 10:46:10,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:10,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:46:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:46:10,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:46:10,240 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 148 [2022-07-12 10:46:10,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:10,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:10,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 148 [2022-07-12 10:46:10,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:11,268 INFO L129 PetriNetUnfolder]: 1817/8164 cut-off events. [2022-07-12 10:46:11,268 INFO L130 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-07-12 10:46:11,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 8164 events. 1817/8164 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 74601 event pairs, 313 based on Foata normal form. 1608/9210 useless extension candidates. Maximal degree in co-relation 5991. Up to 2073 conditions per place. [2022-07-12 10:46:11,346 INFO L132 encePairwiseOnDemand]: 140/148 looper letters, 24 selfloop transitions, 0 changer transitions 0/136 dead transitions. [2022-07-12 10:46:11,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 432 flow [2022-07-12 10:46:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:46:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:46:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-07-12 10:46:11,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8648648648648649 [2022-07-12 10:46:11,348 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-07-12 10:46:11,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-07-12 10:46:11,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:11,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-07-12 10:46:11,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:11,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:11,351 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:11,351 INFO L186 Difference]: Start difference. First operand has 141 places, 148 transitions, 408 flow. Second operand 2 states and 256 transitions. [2022-07-12 10:46:11,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 432 flow [2022-07-12 10:46:11,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 136 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:11,355 INFO L242 Difference]: Finished difference. Result has 138 places, 136 transitions, 384 flow [2022-07-12 10:46:11,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=136} [2022-07-12 10:46:11,356 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -3 predicate places. [2022-07-12 10:46:11,356 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 136 transitions, 384 flow [2022-07-12 10:46:11,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:11,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:11,357 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:46:11,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:46:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash 207662518, now seen corresponding path program 1 times [2022-07-12 10:46:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:11,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490496968] [2022-07-12 10:46:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:11,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490496968] [2022-07-12 10:46:11,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490496968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:11,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:11,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:46:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965441414] [2022-07-12 10:46:11,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:11,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:46:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:46:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:46:11,382 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 148 [2022-07-12 10:46:11,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 136 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:11,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:11,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 148 [2022-07-12 10:46:11,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:12,787 INFO L129 PetriNetUnfolder]: 2570/10361 cut-off events. [2022-07-12 10:46:12,788 INFO L130 PetriNetUnfolder]: For 3152/3152 co-relation queries the response was YES. [2022-07-12 10:46:12,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20629 conditions, 10361 events. 2570/10361 cut-off events. For 3152/3152 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 102844 event pairs, 152 based on Foata normal form. 0/9823 useless extension candidates. Maximal degree in co-relation 20618. Up to 4843 conditions per place. [2022-07-12 10:46:12,872 INFO L132 encePairwiseOnDemand]: 136/148 looper letters, 73 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2022-07-12 10:46:12,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 658 flow [2022-07-12 10:46:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:46:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:46:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2022-07-12 10:46:12,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2022-07-12 10:46:12,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2022-07-12 10:46:12,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2022-07-12 10:46:12,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:12,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2022-07-12 10:46:12,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:12,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:12,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:12,877 INFO L186 Difference]: Start difference. First operand has 138 places, 136 transitions, 384 flow. Second operand 3 states and 346 transitions. [2022-07-12 10:46:12,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 658 flow [2022-07-12 10:46:12,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 168 transitions, 658 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:46:12,887 INFO L242 Difference]: Finished difference. Result has 141 places, 140 transitions, 432 flow [2022-07-12 10:46:12,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2022-07-12 10:46:12,888 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-12 10:46:12,888 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 432 flow [2022-07-12 10:46:12,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:12,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:12,889 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:12,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:46:12,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:46:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 676761736, now seen corresponding path program 1 times [2022-07-12 10:46:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420549885] [2022-07-12 10:46:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:12,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420549885] [2022-07-12 10:46:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420549885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:46:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243992042] [2022-07-12 10:46:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:12,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:46:12,932 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) [2022-07-12 10:46:12,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:46:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:46:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:46:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:13,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:46:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:13,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243992042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:46:13,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:46:13,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:46:13,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570949747] [2022-07-12 10:46:13,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:46:13,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:46:13,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:46:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:46:13,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 148 [2022-07-12 10:46:13,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:13,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:13,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 148 [2022-07-12 10:46:13,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:14,469 INFO L129 PetriNetUnfolder]: 2538/10077 cut-off events. [2022-07-12 10:46:14,469 INFO L130 PetriNetUnfolder]: For 3601/3601 co-relation queries the response was YES. [2022-07-12 10:46:14,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21963 conditions, 10077 events. 2538/10077 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 103177 event pairs, 214 based on Foata normal form. 2/10071 useless extension candidates. Maximal degree in co-relation 21950. Up to 2161 conditions per place. [2022-07-12 10:46:14,584 INFO L132 encePairwiseOnDemand]: 133/148 looper letters, 69 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2022-07-12 10:46:14,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 732 flow [2022-07-12 10:46:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:46:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:46:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 942 transitions. [2022-07-12 10:46:14,588 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6364864864864865 [2022-07-12 10:46:14,588 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 942 transitions. [2022-07-12 10:46:14,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 942 transitions. [2022-07-12 10:46:14,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:14,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 942 transitions. [2022-07-12 10:46:14,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.2) internal successors, (942), 10 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:14,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:14,593 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:14,594 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 432 flow. Second operand 10 states and 942 transitions. [2022-07-12 10:46:14,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 732 flow [2022-07-12 10:46:14,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 175 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:46:14,608 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 524 flow [2022-07-12 10:46:14,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-07-12 10:46:14,609 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2022-07-12 10:46:14,609 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 524 flow [2022-07-12 10:46:14,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:14,610 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:14,610 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:46:14,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:46:14,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:14,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:46:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1377560969, now seen corresponding path program 1 times [2022-07-12 10:46:14,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421420406] [2022-07-12 10:46:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:46:14,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:14,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421420406] [2022-07-12 10:46:14,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421420406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:46:14,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:46:14,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:46:14,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361232932] [2022-07-12 10:46:14,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:46:14,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:46:14,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:46:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:46:14,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 148 [2022-07-12 10:46:14,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:14,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:14,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 148 [2022-07-12 10:46:14,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand