./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/04_incdec_cas.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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:02:15,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:02:15,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:02:15,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:02:15,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:02:15,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:02:15,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:02:15,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:02:15,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:02:15,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:02:15,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:02:15,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:02:15,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:02:15,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:02:15,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:02:15,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:02:15,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:02:15,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:02:15,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:02:15,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:02:15,719 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:02:15,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:02:15,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:02:15,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:02:15,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:02:15,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:02:15,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:02:15,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:02:15,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:02:15,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:02:15,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:02:15,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:02:15,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:02:15,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:02:15,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:02:15,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:02:15,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:02:15,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:02:15,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:02:15,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:02:15,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:02:15,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:02:15,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:02:15,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:02:15,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:02:15,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:02:15,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:02:15,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:02:15,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:02:15,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:02:15,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:02:15,760 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:02:15,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:02:15,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:02:15,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:02:15,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:02:15,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:02:15,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:02:15,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:02:15,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:02:15,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:02:15,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:02:15,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:02:15,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:02:15,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:02:15,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:02:15,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:02:15,764 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:02:15,764 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:02:15,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:02:15,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b [2022-07-19 21:02:15,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:02:15,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:02:15,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:02:15,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:02:15,986 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:02:15,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-07-19 21:02:16,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e03008982/3523674978eb4f0483e1c0dd3fb4ee45/FLAG2c2e6a7a1 [2022-07-19 21:02:16,369 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:02:16,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-07-19 21:02:16,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e03008982/3523674978eb4f0483e1c0dd3fb4ee45/FLAG2c2e6a7a1 [2022-07-19 21:02:16,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e03008982/3523674978eb4f0483e1c0dd3fb4ee45 [2022-07-19 21:02:16,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:02:16,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:02:16,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:02:16,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:02:16,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:02:16,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:02:16" (1/1) ... [2022-07-19 21:02:16,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65aa0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:16, skipping insertion in model container [2022-07-19 21:02:16,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:02:16" (1/1) ... [2022-07-19 21:02:16,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:02:16,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:02:17,022 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-07-19 21:02:17,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-07-19 21:02:17,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:02:17,039 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:02:17,070 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-07-19 21:02:17,072 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-07-19 21:02:17,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:02:17,095 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:02:17,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17 WrapperNode [2022-07-19 21:02:17,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:02:17,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:02:17,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:02:17,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:02:17,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,128 INFO L137 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 158 [2022-07-19 21:02:17,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:02:17,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:02:17,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:02:17,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:02:17,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:02:17,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:02:17,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:02:17,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:02:17,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (1/1) ... [2022-07-19 21:02:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:02:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:02:17,204 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) [2022-07-19 21:02:17,219 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 [2022-07-19 21:02:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:02:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:02:17,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:02:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:02:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:02:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:02:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:02:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:02:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:02:17,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:02:17,236 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:02:17,346 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:02:17,348 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:02:17,500 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:02:17,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:02:17,588 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:02:17,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:02:17 BoogieIcfgContainer [2022-07-19 21:02:17,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:02:17,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:02:17,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:02:17,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:02:17,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:02:16" (1/3) ... [2022-07-19 21:02:17,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153127b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:02:17, skipping insertion in model container [2022-07-19 21:02:17,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:17" (2/3) ... [2022-07-19 21:02:17,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153127b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:02:17, skipping insertion in model container [2022-07-19 21:02:17,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:02:17" (3/3) ... [2022-07-19 21:02:17,598 INFO L111 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2022-07-19 21:02:17,601 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:02:17,606 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:02:17,607 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 21:02:17,607 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:02:17,656 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:17,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 215 flow [2022-07-19 21:02:17,735 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2022-07-19 21:02:17,735 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:02:17,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 116 events. 9/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-07-19 21:02:17,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 215 flow [2022-07-19 21:02:17,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 105 transitions, 215 flow [2022-07-19 21:02:17,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:17,761 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@5c96dfa2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a0b2deb [2022-07-19 21:02:17,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:02:17,774 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2022-07-19 21:02:17,775 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:02:17,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:17,775 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] [2022-07-19 21:02:17,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:02:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -618762747, now seen corresponding path program 1 times [2022-07-19 21:02:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:17,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069435735] [2022-07-19 21:02:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:17,855 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:17,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:17,885 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:17,886 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:02:17,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:02:17,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:02:17,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:02:17,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:02:17,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:02:17,888 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:02:17,890 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:17,890 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:02:17,930 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:17,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 360 flow [2022-07-19 21:02:17,955 INFO L129 PetriNetUnfolder]: 17/198 cut-off events. [2022-07-19 21:02:17,957 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:02:17,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 198 events. 17/198 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 641 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-07-19 21:02:17,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 360 flow [2022-07-19 21:02:17,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 360 flow [2022-07-19 21:02:17,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:17,965 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@5c96dfa2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a0b2deb [2022-07-19 21:02:17,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:02:17,972 INFO L129 PetriNetUnfolder]: 3/86 cut-off events. [2022-07-19 21:02:17,975 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:02:17,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:17,975 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] [2022-07-19 21:02:17,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:02:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash -444542195, now seen corresponding path program 1 times [2022-07-19 21:02:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825020722] [2022-07-19 21:02:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:17,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:02:18,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825020722] [2022-07-19 21:02:18,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825020722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:18,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:18,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:02:18,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071482856] [2022-07-19 21:02:18,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:02:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:02:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:02:18,100 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 174 [2022-07-19 21:02:18,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 174 transitions, 360 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 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) [2022-07-19 21:02:18,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:18,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 174 [2022-07-19 21:02:18,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:02:18,259 INFO L129 PetriNetUnfolder]: 82/659 cut-off events. [2022-07-19 21:02:18,260 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-19 21:02:18,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 659 events. 82/659 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4394 event pairs, 42 based on Foata normal form. 85/672 useless extension candidates. Maximal degree in co-relation 150. Up to 99 conditions per place. [2022-07-19 21:02:18,267 INFO L132 encePairwiseOnDemand]: 168/174 looper letters, 14 selfloop transitions, 0 changer transitions 0/163 dead transitions. [2022-07-19 21:02:18,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 366 flow [2022-07-19 21:02:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:02:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:02:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 328 transitions. [2022-07-19 21:02:18,281 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-07-19 21:02:18,283 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 328 transitions. [2022-07-19 21:02:18,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 328 transitions. [2022-07-19 21:02:18,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:02:18,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 328 transitions. [2022-07-19 21:02:18,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 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) [2022-07-19 21:02:18,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2022-07-19 21:02:18,297 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2022-07-19 21:02:18,298 INFO L186 Difference]: Start difference. First operand has 164 places, 174 transitions, 360 flow. Second operand 2 states and 328 transitions. [2022-07-19 21:02:18,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 163 transitions, 366 flow [2022-07-19 21:02:18,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 364 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:02:18,308 INFO L242 Difference]: Finished difference. Result has 159 places, 163 transitions, 336 flow [2022-07-19 21:02:18,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=336, PETRI_PLACES=159, PETRI_TRANSITIONS=163} [2022-07-19 21:02:18,312 INFO L279 CegarLoopForPetriNet]: 164 programPoint places, -5 predicate places. [2022-07-19 21:02:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 336 flow [2022-07-19 21:02:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 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) [2022-07-19 21:02:18,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:18,314 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:02:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:02:18,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:02:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash -983549349, now seen corresponding path program 1 times [2022-07-19 21:02:18,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490627717] [2022-07-19 21:02:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:18,356 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:18,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:18,388 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:18,388 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-19 21:02:18,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-19 21:02:18,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-19 21:02:18,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-19 21:02:18,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-19 21:02:18,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-19 21:02:18,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-19 21:02:18,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:02:18,391 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:02:18,391 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:18,391 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:02:18,459 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:18,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 243 transitions, 507 flow [2022-07-19 21:02:18,493 INFO L129 PetriNetUnfolder]: 25/280 cut-off events. [2022-07-19 21:02:18,511 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:02:18,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 280 events. 25/280 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1092 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-07-19 21:02:18,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 243 transitions, 507 flow [2022-07-19 21:02:18,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 507 flow [2022-07-19 21:02:18,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:18,520 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@5c96dfa2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a0b2deb [2022-07-19 21:02:18,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-19 21:02:18,527 INFO L129 PetriNetUnfolder]: 3/90 cut-off events. [2022-07-19 21:02:18,527 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:02:18,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:18,527 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] [2022-07-19 21:02:18,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:02:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1968246583, now seen corresponding path program 1 times [2022-07-19 21:02:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831966368] [2022-07-19 21:02:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:18,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:02:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:18,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831966368] [2022-07-19 21:02:18,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831966368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:18,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:18,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:02:18,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636084220] [2022-07-19 21:02:18,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:18,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:02:18,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:02:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:02:18,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 243 [2022-07-19 21:02:18,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 243 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:02:18,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:18,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 243 [2022-07-19 21:02:18,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:02:19,195 INFO L129 PetriNetUnfolder]: 915/4866 cut-off events. [2022-07-19 21:02:19,196 INFO L130 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-07-19 21:02:19,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6266 conditions, 4866 events. 915/4866 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 53404 event pairs, 630 based on Foata normal form. 708/4947 useless extension candidates. Maximal degree in co-relation 789. Up to 1030 conditions per place. [2022-07-19 21:02:19,237 INFO L132 encePairwiseOnDemand]: 235/243 looper letters, 21 selfloop transitions, 0 changer transitions 0/230 dead transitions. [2022-07-19 21:02:19,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 230 transitions, 523 flow [2022-07-19 21:02:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:02:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:02:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-07-19 21:02:19,240 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9403292181069959 [2022-07-19 21:02:19,240 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-07-19 21:02:19,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-07-19 21:02:19,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:02:19,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-07-19 21:02:19,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 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) [2022-07-19 21:02:19,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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) [2022-07-19 21:02:19,244 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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) [2022-07-19 21:02:19,244 INFO L186 Difference]: Start difference. First operand has 228 places, 243 transitions, 507 flow. Second operand 2 states and 457 transitions. [2022-07-19 21:02:19,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 230 transitions, 523 flow [2022-07-19 21:02:19,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 230 transitions, 517 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:02:19,255 INFO L242 Difference]: Finished difference. Result has 223 places, 230 transitions, 475 flow [2022-07-19 21:02:19,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=475, PETRI_PLACES=223, PETRI_TRANSITIONS=230} [2022-07-19 21:02:19,256 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -5 predicate places. [2022-07-19 21:02:19,257 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 230 transitions, 475 flow [2022-07-19 21:02:19,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:02:19,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:19,257 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:02:19,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:02:19,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-19 21:02:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1044587364, now seen corresponding path program 1 times [2022-07-19 21:02:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:19,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942196339] [2022-07-19 21:02:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:19,290 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:19,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:19,304 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:19,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-07-19 21:02:19,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-07-19 21:02:19,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-07-19 21:02:19,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-07-19 21:02:19,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-07-19 21:02:19,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-07-19 21:02:19,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-07-19 21:02:19,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-07-19 21:02:19,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-07-19 21:02:19,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:02:19,306 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:02:19,306 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:19,306 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:02:19,387 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:19,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 292 places, 312 transitions, 656 flow [2022-07-19 21:02:19,431 INFO L129 PetriNetUnfolder]: 33/362 cut-off events. [2022-07-19 21:02:19,431 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:02:19,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 362 events. 33/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1531 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 288. Up to 10 conditions per place. [2022-07-19 21:02:19,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 312 transitions, 656 flow [2022-07-19 21:02:19,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 312 transitions, 656 flow [2022-07-19 21:02:19,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:19,442 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@5c96dfa2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a0b2deb [2022-07-19 21:02:19,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-19 21:02:19,448 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-19 21:02:19,448 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:02:19,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:19,448 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] [2022-07-19 21:02:19,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-19 21:02:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1795008533, now seen corresponding path program 1 times [2022-07-19 21:02:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:19,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221510179] [2022-07-19 21:02:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:02:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221510179] [2022-07-19 21:02:19,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221510179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:19,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:19,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:02:19,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743645078] [2022-07-19 21:02:19,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:02:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:02:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:02:19,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 312 [2022-07-19 21:02:19,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 312 transitions, 656 flow. Second operand has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 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) [2022-07-19 21:02:19,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:19,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 312 [2022-07-19 21:02:19,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:02:23,738 INFO L129 PetriNetUnfolder]: 8804/36373 cut-off events. [2022-07-19 21:02:23,738 INFO L130 PetriNetUnfolder]: For 5804/5804 co-relation queries the response was YES. [2022-07-19 21:02:23,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49289 conditions, 36373 events. 8804/36373 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 531338 event pairs, 6804 based on Foata normal form. 5755/36930 useless extension candidates. Maximal degree in co-relation 6347. Up to 9605 conditions per place. [2022-07-19 21:02:24,151 INFO L132 encePairwiseOnDemand]: 302/312 looper letters, 28 selfloop transitions, 0 changer transitions 0/297 dead transitions. [2022-07-19 21:02:24,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 297 transitions, 682 flow [2022-07-19 21:02:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:02:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:02:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 586 transitions. [2022-07-19 21:02:24,154 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-07-19 21:02:24,154 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 586 transitions. [2022-07-19 21:02:24,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 586 transitions. [2022-07-19 21:02:24,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:02:24,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 586 transitions. [2022-07-19 21:02:24,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 293.0) internal successors, (586), 2 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:02:24,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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) [2022-07-19 21:02:24,157 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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) [2022-07-19 21:02:24,157 INFO L186 Difference]: Start difference. First operand has 292 places, 312 transitions, 656 flow. Second operand 2 states and 586 transitions. [2022-07-19 21:02:24,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 297 transitions, 682 flow [2022-07-19 21:02:24,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 297 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:02:24,168 INFO L242 Difference]: Finished difference. Result has 287 places, 297 transitions, 614 flow [2022-07-19 21:02:24,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=614, PETRI_PLACES=287, PETRI_TRANSITIONS=297} [2022-07-19 21:02:24,170 INFO L279 CegarLoopForPetriNet]: 292 programPoint places, -5 predicate places. [2022-07-19 21:02:24,172 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 297 transitions, 614 flow [2022-07-19 21:02:24,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 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) [2022-07-19 21:02:24,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:24,173 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] [2022-07-19 21:02:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:02:24,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-19 21:02:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash -551703534, now seen corresponding path program 1 times [2022-07-19 21:02:24,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:24,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732235150] [2022-07-19 21:02:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:02:24,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:24,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732235150] [2022-07-19 21:02:24,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732235150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:24,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:24,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:02:24,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629431819] [2022-07-19 21:02:24,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:24,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:02:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:02:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:02:24,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 312 [2022-07-19 21:02:24,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 297 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 204.14285714285714) internal successors, (2858), 14 states have internal predecessors, (2858), 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) [2022-07-19 21:02:24,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:24,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 312 [2022-07-19 21:02:24,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand