./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-complex/workstealqueue_mutex-1.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 3a1634bb3c8fd20e3116589f39b7439eb06d3d5864b5afee415eff1cf39cd7c4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:52:04,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:52:04,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:52:04,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:52:04,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:52:04,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:52:04,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:52:04,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:52:04,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:52:04,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:52:04,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:52:04,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:52:04,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:52:04,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:52:04,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:52:04,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:52:04,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:52:04,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:52:04,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:52:04,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:52:04,803 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:52:04,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:52:04,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:52:04,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:52:04,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:52:04,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:52:04,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:52:04,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:52:04,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:52:04,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:52:04,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:52:04,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:52:04,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:52:04,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:52:04,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:52:04,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:52:04,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:52:04,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:52:04,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:52:04,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:52:04,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:52:04,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:52:04,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:52:04,850 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:52:04,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:52:04,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:52:04,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:52:04,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:52:04,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:52:04,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:52:04,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:52:04,858 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:52:04,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:52:04,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:52:04,860 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:52:04,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:52:04,860 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:52:04,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:52:04,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:52:04,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:52:04,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:52:04,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:52:04,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:52:04,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:52:04,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:52:04,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:52:04,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:52:04,864 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:52:04,864 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:52:04,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:52:04,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1634bb3c8fd20e3116589f39b7439eb06d3d5864b5afee415eff1cf39cd7c4 [2022-07-13 21:52:05,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:52:05,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:52:05,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:52:05,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:52:05,066 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:52:05,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i [2022-07-13 21:52:05,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6a54fd73/05af502853b3436396a53b3a2367c708/FLAG74ee7e5fc [2022-07-13 21:52:05,609 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:52:05,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i [2022-07-13 21:52:05,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6a54fd73/05af502853b3436396a53b3a2367c708/FLAG74ee7e5fc [2022-07-13 21:52:06,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6a54fd73/05af502853b3436396a53b3a2367c708 [2022-07-13 21:52:06,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:52:06,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:52:06,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:52:06,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:52:06,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:52:06,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11222d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06, skipping insertion in model container [2022-07-13 21:52:06,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:52:06,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:52:06,663 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-complex/workstealqueue_mutex-1.i[76469,76482] [2022-07-13 21:52:06,692 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-complex/workstealqueue_mutex-1.i[79042,79055] [2022-07-13 21:52:06,697 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-complex/workstealqueue_mutex-1.i[79451,79464] [2022-07-13 21:52:06,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:52:06,715 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:52:06,752 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-complex/workstealqueue_mutex-1.i[76469,76482] [2022-07-13 21:52:06,763 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-complex/workstealqueue_mutex-1.i[79042,79055] [2022-07-13 21:52:06,765 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-complex/workstealqueue_mutex-1.i[79451,79464] [2022-07-13 21:52:06,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:52:06,867 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:52:06,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06 WrapperNode [2022-07-13 21:52:06,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:52:06,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:52:06,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:52:06,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:52:06,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,935 INFO L137 Inliner]: procedures = 489, calls = 128, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1729 [2022-07-13 21:52:06,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:52:06,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:52:06,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:52:06,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:52:06,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:06,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:07,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:07,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:07,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:07,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:52:07,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:52:07,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:52:07,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:52:07,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (1/1) ... [2022-07-13 21:52:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:52:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:52:07,098 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) [2022-07-13 21:52:07,122 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-07-13 21:52:07,124 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-07-13 21:52:07,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:52:07,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:52:07,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:52:07,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:52:07,125 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:52:07,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:52:07,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 21:52:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:52:07,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:52:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:52:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 21:52:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:52:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:52:07,130 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:52:07,112 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 [2022-07-13 21:52:07,412 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:52:07,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:52:08,601 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:52:08,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:52:08,809 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-13 21:52:08,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:52:08 BoogieIcfgContainer [2022-07-13 21:52:08,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:52:08,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:52:08,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:52:08,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:52:08,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:52:06" (1/3) ... [2022-07-13 21:52:08,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341c89cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:52:08, skipping insertion in model container [2022-07-13 21:52:08,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:06" (2/3) ... [2022-07-13 21:52:08,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341c89cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:52:08, skipping insertion in model container [2022-07-13 21:52:08,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:52:08" (3/3) ... [2022-07-13 21:52:08,817 INFO L111 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-1.i [2022-07-13 21:52:08,821 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:52:08,827 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:52:08,827 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-13 21:52:08,827 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:52:08,946 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:52:08,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-13 21:52:09,654 INFO L129 PetriNetUnfolder]: 97/3125 cut-off events. [2022-07-13 21:52:09,654 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:52:09,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 3125 events. 97/3125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14514 event pairs, 0 based on Foata normal form. 0/3015 useless extension candidates. Maximal degree in co-relation 1594. Up to 10 conditions per place. [2022-07-13 21:52:09,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-13 21:52:09,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1635 places, 1684 transitions, 3376 flow [2022-07-13 21:52:09,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:52:09,716 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@6a077aeb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f540936 [2022-07-13 21:52:09,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:52:09,730 INFO L129 PetriNetUnfolder]: 11/171 cut-off events. [2022-07-13 21:52:09,730 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:52:09,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:09,731 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:09,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:09,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1789532269, now seen corresponding path program 1 times [2022-07-13 21:52:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:09,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70689855] [2022-07-13 21:52:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70689855] [2022-07-13 21:52:09,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70689855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:10,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:10,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:52:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606913196] [2022-07-13 21:52:10,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:10,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:52:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:52:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:52:10,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1611 out of 1684 [2022-07-13 21:52:10,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:10,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:10,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1611 of 1684 [2022-07-13 21:52:10,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:11,953 INFO L129 PetriNetUnfolder]: 384/9309 cut-off events. [2022-07-13 21:52:11,954 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:52:11,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 9309 events. 384/9309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 79211 event pairs, 176 based on Foata normal form. 161/9221 useless extension candidates. Maximal degree in co-relation 8217. Up to 468 conditions per place. [2022-07-13 21:52:12,018 INFO L132 encePairwiseOnDemand]: 1668/1684 looper letters, 52 selfloop transitions, 0 changer transitions 0/1663 dead transitions. [2022-07-13 21:52:12,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1631 places, 1663 transitions, 3438 flow [2022-07-13 21:52:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:52:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:52:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3290 transitions. [2022-07-13 21:52:12,039 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768408551068883 [2022-07-13 21:52:12,039 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3290 transitions. [2022-07-13 21:52:12,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3290 transitions. [2022-07-13 21:52:12,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:12,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3290 transitions. [2022-07-13 21:52:12,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1645.0) internal successors, (3290), 2 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:12,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:12,068 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:12,069 INFO L186 Difference]: Start difference. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand 2 states and 3290 transitions. [2022-07-13 21:52:12,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1631 places, 1663 transitions, 3438 flow [2022-07-13 21:52:12,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1631 places, 1663 transitions, 3438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:52:12,102 INFO L242 Difference]: Finished difference. Result has 1631 places, 1663 transitions, 3334 flow [2022-07-13 21:52:12,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3334, PETRI_PLACES=1631, PETRI_TRANSITIONS=1663} [2022-07-13 21:52:12,108 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -4 predicate places. [2022-07-13 21:52:12,108 INFO L495 AbstractCegarLoop]: Abstraction has has 1631 places, 1663 transitions, 3334 flow [2022-07-13 21:52:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:12,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:12,110 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:52:12,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1152125330, now seen corresponding path program 1 times [2022-07-13 21:52:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317308490] [2022-07-13 21:52:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:12,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:12,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317308490] [2022-07-13 21:52:12,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317308490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:12,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:12,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:52:12,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047962132] [2022-07-13 21:52:12,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:12,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:52:12,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:52:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:52:12,227 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1573 out of 1684 [2022-07-13 21:52:12,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:12,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:12,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1573 of 1684 [2022-07-13 21:52:12,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:15,957 INFO L129 PetriNetUnfolder]: 751/14656 cut-off events. [2022-07-13 21:52:15,958 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:52:16,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 14656 events. 751/14656 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 130291 event pairs, 224 based on Foata normal form. 0/14284 useless extension candidates. Maximal degree in co-relation 15738. Up to 553 conditions per place. [2022-07-13 21:52:16,114 INFO L132 encePairwiseOnDemand]: 1666/1684 looper letters, 143 selfloop transitions, 12 changer transitions 9/1731 dead transitions. [2022-07-13 21:52:16,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1633 places, 1731 transitions, 3786 flow [2022-07-13 21:52:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:52:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:52:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4883 transitions. [2022-07-13 21:52:16,123 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.966547901821061 [2022-07-13 21:52:16,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4883 transitions. [2022-07-13 21:52:16,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4883 transitions. [2022-07-13 21:52:16,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:16,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4883 transitions. [2022-07-13 21:52:16,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1627.6666666666667) internal successors, (4883), 3 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:16,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:16,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:16,144 INFO L186 Difference]: Start difference. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand 3 states and 4883 transitions. [2022-07-13 21:52:16,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1633 places, 1731 transitions, 3786 flow [2022-07-13 21:52:16,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1633 places, 1731 transitions, 3786 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:52:16,168 INFO L242 Difference]: Finished difference. Result has 1634 places, 1660 transitions, 3382 flow [2022-07-13 21:52:16,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3382, PETRI_PLACES=1634, PETRI_TRANSITIONS=1660} [2022-07-13 21:52:16,171 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -1 predicate places. [2022-07-13 21:52:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 1634 places, 1660 transitions, 3382 flow [2022-07-13 21:52:16,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:16,174 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:16,174 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:16,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:52:16,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash 921428864, now seen corresponding path program 1 times [2022-07-13 21:52:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:16,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105894920] [2022-07-13 21:52:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:16,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105894920] [2022-07-13 21:52:16,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105894920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:52:16,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035554314] [2022-07-13 21:52:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:16,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:52:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:52:16,336 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) [2022-07-13 21:52:16,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:52:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:52:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:52:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:52:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:16,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035554314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:52:16,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:52:16,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:52:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975618015] [2022-07-13 21:52:16,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:52:16,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:52:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:52:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:52:16,584 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-13 21:52:16,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:16,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:16,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-13 21:52:16,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:21,030 INFO L129 PetriNetUnfolder]: 869/15024 cut-off events. [2022-07-13 21:52:21,031 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-13 21:52:21,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 15024 events. 869/15024 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 132378 event pairs, 174 based on Foata normal form. 2/14664 useless extension candidates. Maximal degree in co-relation 16312. Up to 577 conditions per place. [2022-07-13 21:52:21,168 INFO L132 encePairwiseOnDemand]: 1663/1684 looper letters, 141 selfloop transitions, 26 changer transitions 2/1735 dead transitions. [2022-07-13 21:52:21,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1635 places, 1735 transitions, 3872 flow [2022-07-13 21:52:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:52:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:52:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14319 transitions. [2022-07-13 21:52:21,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9447743467933492 [2022-07-13 21:52:21,187 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14319 transitions. [2022-07-13 21:52:21,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14319 transitions. [2022-07-13 21:52:21,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:21,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14319 transitions. [2022-07-13 21:52:21,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1591.0) internal successors, (14319), 9 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:21,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:21,238 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:21,238 INFO L186 Difference]: Start difference. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand 9 states and 14319 transitions. [2022-07-13 21:52:21,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1635 places, 1735 transitions, 3872 flow [2022-07-13 21:52:21,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1634 places, 1735 transitions, 3860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:52:21,264 INFO L242 Difference]: Finished difference. Result has 1637 places, 1670 transitions, 3496 flow [2022-07-13 21:52:21,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=1637, PETRI_TRANSITIONS=1670} [2022-07-13 21:52:21,268 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 2 predicate places. [2022-07-13 21:52:21,269 INFO L495 AbstractCegarLoop]: Abstraction has has 1637 places, 1670 transitions, 3496 flow [2022-07-13 21:52:21,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:21,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:21,272 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:21,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 21:52:21,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:52:21,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -613101020, now seen corresponding path program 2 times [2022-07-13 21:52:21,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011621631] [2022-07-13 21:52:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011621631] [2022-07-13 21:52:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011621631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:52:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285570416] [2022-07-13 21:52:21,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:52:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:52:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:52:21,624 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) [2022-07-13 21:52:21,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:52:21,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:52:21,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:52:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:52:21,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:52:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:21,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:52:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:22,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285570416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:52:22,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:52:22,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-13 21:52:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261751182] [2022-07-13 21:52:22,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:52:22,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 21:52:22,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 21:52:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:52:22,023 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-13 21:52:22,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:22,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:22,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-13 21:52:22,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:26,811 INFO L129 PetriNetUnfolder]: 793/16490 cut-off events. [2022-07-13 21:52:26,811 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-13 21:52:26,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17857 conditions, 16490 events. 793/16490 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 148205 event pairs, 420 based on Foata normal form. 1/16097 useless extension candidates. Maximal degree in co-relation 17849. Up to 523 conditions per place. [2022-07-13 21:52:26,935 INFO L132 encePairwiseOnDemand]: 1664/1684 looper letters, 143 selfloop transitions, 29 changer transitions 0/1738 dead transitions. [2022-07-13 21:52:26,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1648 places, 1738 transitions, 3994 flow [2022-07-13 21:52:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:52:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 21:52:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 19037 transitions. [2022-07-13 21:52:26,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9420526524148852 [2022-07-13 21:52:26,958 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 19037 transitions. [2022-07-13 21:52:26,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 19037 transitions. [2022-07-13 21:52:26,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:26,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 19037 transitions. [2022-07-13 21:52:26,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1586.4166666666667) internal successors, (19037), 12 states have internal predecessors, (19037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:27,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:27,015 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:27,016 INFO L186 Difference]: Start difference. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand 12 states and 19037 transitions. [2022-07-13 21:52:27,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1648 places, 1738 transitions, 3994 flow [2022-07-13 21:52:27,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1647 places, 1738 transitions, 3970 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:52:27,046 INFO L242 Difference]: Finished difference. Result has 1651 places, 1674 transitions, 3589 flow [2022-07-13 21:52:27,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=1636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3589, PETRI_PLACES=1651, PETRI_TRANSITIONS=1674} [2022-07-13 21:52:27,050 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 16 predicate places. [2022-07-13 21:52:27,050 INFO L495 AbstractCegarLoop]: Abstraction has has 1651 places, 1674 transitions, 3589 flow [2022-07-13 21:52:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:27,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:27,054 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:27,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:52:27,273 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,SelfDestructingSolverStorable3 [2022-07-13 21:52:27,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:27,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 781063094, now seen corresponding path program 3 times [2022-07-13 21:52:27,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:27,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199023190] [2022-07-13 21:52:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:27,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:52:27,345 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:52:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:52:27,426 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:52:27,426 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:52:27,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-13 21:52:27,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-13 21:52:27,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-13 21:52:27,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-13 21:52:27,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-13 21:52:27,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-13 21:52:27,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:52:27,433 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-13 21:52:27,435 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:52:27,435 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:52:27,518 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:52:27,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-13 21:52:28,616 INFO L129 PetriNetUnfolder]: 152/4761 cut-off events. [2022-07-13 21:52:28,616 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:52:28,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 4761 events. 152/4761 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27568 event pairs, 0 based on Foata normal form. 0/4589 useless extension candidates. Maximal degree in co-relation 3127. Up to 15 conditions per place. [2022-07-13 21:52:28,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-13 21:52:28,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1782 places, 1834 transitions, 3686 flow [2022-07-13 21:52:28,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:52:28,743 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@6a077aeb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f540936 [2022-07-13 21:52:28,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:52:28,751 INFO L129 PetriNetUnfolder]: 13/197 cut-off events. [2022-07-13 21:52:28,751 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:52:28,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:28,751 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:28,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1187252170, now seen corresponding path program 1 times [2022-07-13 21:52:28,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:28,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431704400] [2022-07-13 21:52:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431704400] [2022-07-13 21:52:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431704400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:28,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:28,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:52:28,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712514447] [2022-07-13 21:52:28,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:28,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:52:28,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:52:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:52:28,788 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1754 out of 1834 [2022-07-13 21:52:28,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand has 2 states, 2 states have (on average 1756.0) internal successors, (3512), 2 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:28,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:28,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1754 of 1834 [2022-07-13 21:52:28,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:40,671 INFO L129 PetriNetUnfolder]: 3062/49401 cut-off events. [2022-07-13 21:52:40,671 INFO L130 PetriNetUnfolder]: For 73/77 co-relation queries the response was YES. [2022-07-13 21:52:41,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52938 conditions, 49401 events. 3062/49401 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 640460 event pairs, 1964 based on Foata normal form. 1133/49213 useless extension candidates. Maximal degree in co-relation 9703. Up to 3491 conditions per place. [2022-07-13 21:52:41,162 INFO L132 encePairwiseOnDemand]: 1817/1834 looper letters, 58 selfloop transitions, 0 changer transitions 0/1812 dead transitions. [2022-07-13 21:52:41,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1778 places, 1812 transitions, 3758 flow [2022-07-13 21:52:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:52:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:52:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3583 transitions. [2022-07-13 21:52:41,168 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768266085059978 [2022-07-13 21:52:41,168 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3583 transitions. [2022-07-13 21:52:41,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3583 transitions. [2022-07-13 21:52:41,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:41,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3583 transitions. [2022-07-13 21:52:41,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1791.5) internal successors, (3583), 2 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:41,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:41,175 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:41,176 INFO L186 Difference]: Start difference. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand 2 states and 3583 transitions. [2022-07-13 21:52:41,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1778 places, 1812 transitions, 3758 flow [2022-07-13 21:52:41,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1778 places, 1812 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:52:41,196 INFO L242 Difference]: Finished difference. Result has 1778 places, 1812 transitions, 3642 flow [2022-07-13 21:52:41,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3642, PETRI_PLACES=1778, PETRI_TRANSITIONS=1812} [2022-07-13 21:52:41,202 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -4 predicate places. [2022-07-13 21:52:41,205 INFO L495 AbstractCegarLoop]: Abstraction has has 1778 places, 1812 transitions, 3642 flow [2022-07-13 21:52:41,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1756.0) internal successors, (3512), 2 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:41,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:41,206 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:52:41,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash -903102196, now seen corresponding path program 1 times [2022-07-13 21:52:41,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:41,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286844130] [2022-07-13 21:52:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286844130] [2022-07-13 21:52:41,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286844130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:41,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:41,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:52:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460099623] [2022-07-13 21:52:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:41,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:52:41,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:52:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:52:41,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1716 out of 1834 [2022-07-13 21:52:41,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:41,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:41,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1716 of 1834 [2022-07-13 21:52:41,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:12,987 INFO L129 PetriNetUnfolder]: 7534/98237 cut-off events. [2022-07-13 21:53:12,988 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-13 21:53:14,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107757 conditions, 98237 events. 7534/98237 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 1354653 event pairs, 3101 based on Foata normal form. 0/95615 useless extension candidates. Maximal degree in co-relation 107752. Up to 4939 conditions per place. [2022-07-13 21:53:14,840 INFO L132 encePairwiseOnDemand]: 1816/1834 looper letters, 162 selfloop transitions, 12 changer transitions 0/1890 dead transitions. [2022-07-13 21:53:14,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1780 places, 1890 transitions, 4152 flow [2022-07-13 21:53:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:53:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:53:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5328 transitions. [2022-07-13 21:53:14,847 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9683751363140676 [2022-07-13 21:53:14,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5328 transitions. [2022-07-13 21:53:14,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5328 transitions. [2022-07-13 21:53:14,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:14,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5328 transitions. [2022-07-13 21:53:14,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1776.0) internal successors, (5328), 3 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1834.0) internal successors, (7336), 4 states have internal predecessors, (7336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1834.0) internal successors, (7336), 4 states have internal predecessors, (7336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,861 INFO L186 Difference]: Start difference. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand 3 states and 5328 transitions. [2022-07-13 21:53:14,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1780 places, 1890 transitions, 4152 flow [2022-07-13 21:53:14,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1780 places, 1890 transitions, 4152 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:14,884 INFO L242 Difference]: Finished difference. Result has 1781 places, 1818 transitions, 3714 flow [2022-07-13 21:53:14,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3714, PETRI_PLACES=1781, PETRI_TRANSITIONS=1818} [2022-07-13 21:53:14,887 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -1 predicate places. [2022-07-13 21:53:14,887 INFO L495 AbstractCegarLoop]: Abstraction has has 1781 places, 1818 transitions, 3714 flow [2022-07-13 21:53:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:14,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:14,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:53:14,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:53:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1501176274, now seen corresponding path program 1 times [2022-07-13 21:53:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:14,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863742617] [2022-07-13 21:53:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:14,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:53:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:14,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863742617] [2022-07-13 21:53:14,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863742617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:53:14,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555901914] [2022-07-13 21:53:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:14,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:14,948 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) [2022-07-13 21:53:14,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:53:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:53:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:53:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:53:15,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:53:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:53:15,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555901914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:53:15,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:53:15,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:53:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28358345] [2022-07-13 21:53:15,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:53:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:53:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:53:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:53:15,171 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1715 out of 1834 [2022-07-13 21:53:15,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1781 places, 1818 transitions, 3714 flow. Second operand has 10 states, 10 states have (on average 1718.0) internal successors, (17180), 10 states have internal predecessors, (17180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:15,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:15,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1715 of 1834 [2022-07-13 21:53:15,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand