./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/17_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/17_szymanski.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 9c051ca3a402db468e0ce05dfc38d0dfe3d0c9a7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 14:19:00,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 14:19:00,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 14:19:00,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 14:19:00,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 14:19:00,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 14:19:00,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 14:19:00,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 14:19:00,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 14:19:00,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 14:19:00,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 14:19:00,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 14:19:00,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 14:19:00,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 14:19:00,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 14:19:00,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 14:19:00,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 14:19:00,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 14:19:00,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 14:19:00,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 14:19:00,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 14:19:00,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 14:19:00,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 14:19:00,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 14:19:00,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 14:19:00,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 14:19:00,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 14:19:00,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 14:19:00,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 14:19:00,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 14:19:00,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 14:19:00,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 14:19:00,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 14:19:00,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 14:19:00,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 14:19:00,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 14:19:00,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 14:19:00,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 14:19:00,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 14:19:00,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 14:19:00,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 14:19:00,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 14:19:00,819 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 14:19:00,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 14:19:00,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 14:19:00,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 14:19:00,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 14:19:00,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 14:19:00,822 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 14:19:00,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 14:19:00,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 14:19:00,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 14:19:00,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 14:19:00,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 14:19:00,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 14:19:00,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:19:00,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 14:19:00,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 14:19:00,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c051ca3a402db468e0ce05dfc38d0dfe3d0c9a7 [2021-08-26 14:19:01,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 14:19:01,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 14:19:01,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 14:19:01,072 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 14:19:01,072 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 14:19:01,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/17_szymanski.i [2021-08-26 14:19:01,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/152781c7e/3aeac101b5d54f218857730127c6b409/FLAG0972ea565 [2021-08-26 14:19:01,557 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 14:19:01,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/17_szymanski.i [2021-08-26 14:19:01,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/152781c7e/3aeac101b5d54f218857730127c6b409/FLAG0972ea565 [2021-08-26 14:19:01,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/152781c7e/3aeac101b5d54f218857730127c6b409 [2021-08-26 14:19:01,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 14:19:01,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 14:19:01,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 14:19:01,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 14:19:01,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 14:19:01,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:01,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2103bf56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01, skipping insertion in model container [2021-08-26 14:19:01,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:01,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 14:19:01,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 14:19:01,879 WARN L228 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/17_szymanski.i[30132,30145] [2021-08-26 14:19:01,889 WARN L228 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/17_szymanski.i[30481,30494] [2021-08-26 14:19:01,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:19:01,899 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 14:19:01,932 WARN L228 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/17_szymanski.i[30132,30145] [2021-08-26 14:19:01,939 WARN L228 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/17_szymanski.i[30481,30494] [2021-08-26 14:19:01,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:19:01,973 INFO L208 MainTranslator]: Completed translation [2021-08-26 14:19:01,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01 WrapperNode [2021-08-26 14:19:01,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 14:19:01,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 14:19:01,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 14:19:01,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 14:19:01,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 14:19:02,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 14:19:02,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 14:19:02,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 14:19:02,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 14:19:02,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 14:19:02,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 14:19:02,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 14:19:02,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (1/1) ... [2021-08-26 14:19:02,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:19:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:19:02,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 14:19:02,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 14:19:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-08-26 14:19:02,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-08-26 14:19:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 14:19:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 14:19:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 14:19:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 14:19:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 14:19:02,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 14:19:02,135 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-26 14:19:02,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 14:19:02,423 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-08-26 14:19:02,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:19:02 BoogieIcfgContainer [2021-08-26 14:19:02,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 14:19:02,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 14:19:02,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 14:19:02,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 14:19:02,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:19:01" (1/3) ... [2021-08-26 14:19:02,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ec003b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:19:02, skipping insertion in model container [2021-08-26 14:19:02,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:19:01" (2/3) ... [2021-08-26 14:19:02,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ec003b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:19:02, skipping insertion in model container [2021-08-26 14:19:02,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:19:02" (3/3) ... [2021-08-26 14:19:02,433 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2021-08-26 14:19:02,436 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-26 14:19:02,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 14:19:02,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 14:19:02,437 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-26 14:19:02,451 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,451 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,451 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,451 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,452 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,452 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,452 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,452 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,452 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,452 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,453 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,453 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,455 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,456 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,456 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,456 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:19:02,459 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-26 14:19:02,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 14:19:02,491 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 14:19:02,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-26 14:19:02,499 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-08-26 14:19:02,505 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 91 transitions, 187 flow [2021-08-26 14:19:02,507 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 91 transitions, 187 flow [2021-08-26 14:19:02,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 91 transitions, 187 flow [2021-08-26 14:19:02,531 INFO L129 PetriNetUnfolder]: 24/90 cut-off events. [2021-08-26 14:19:02,531 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-26 14:19:02,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 24/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 73. Up to 3 conditions per place. [2021-08-26 14:19:02,536 INFO L116 LiptonReduction]: Number of co-enabled transitions 2604 [2021-08-26 14:19:04,081 INFO L131 LiptonReduction]: Checked pairs total: 5033 [2021-08-26 14:19:04,082 INFO L133 LiptonReduction]: Total number of compositions: 52 [2021-08-26 14:19:04,088 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 51 transitions, 107 flow [2021-08-26 14:19:04,114 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 226 states, 223 states have (on average 3.2286995515695067) internal successors, (720), 225 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 223 states have (on average 3.2286995515695067) internal successors, (720), 225 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 14:19:04,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:19:04,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:19:04,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-08-26 14:19:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:19:04,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1294483565, now seen corresponding path program 1 times [2021-08-26 14:19:04,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:19:04,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537967388] [2021-08-26 14:19:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:19:04,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:19:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:19:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:19:04,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:19:04,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537967388] [2021-08-26 14:19:04,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537967388] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:19:04,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:19:04,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:19:04,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355373629] [2021-08-26 14:19:04,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 14:19:04,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:19:04,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 14:19:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 14:19:04,287 INFO L87 Difference]: Start difference. First operand has 226 states, 223 states have (on average 3.2286995515695067) internal successors, (720), 225 states have internal predecessors, (720), 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:19:04,299 INFO L93 Difference]: Finished difference Result 198 states and 534 transitions. [2021-08-26 14:19:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 14:19:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) Word has length 9 [2021-08-26 14:19:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:19:04,307 INFO L225 Difference]: With dead ends: 198 [2021-08-26 14:19:04,308 INFO L226 Difference]: Without dead ends: 198 [2021-08-26 14:19:04,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 14:19:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-26 14:19:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-08-26 14:19:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.7106598984771573) internal successors, (534), 197 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 534 transitions. [2021-08-26 14:19:04,361 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 534 transitions. Word has length 9 [2021-08-26 14:19:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:19:04,361 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 534 transitions. [2021-08-26 14:19:04,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 534 transitions. [2021-08-26 14:19:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:19:04,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:19:04,363 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:19:04,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 14:19:04,363 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-08-26 14:19:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:19:04,364 INFO L82 PathProgramCache]: Analyzing trace with hash -749712940, now seen corresponding path program 1 times [2021-08-26 14:19:04,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:19:04,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492720768] [2021-08-26 14:19:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:19:04,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:19:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:19:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:19:04,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:19:04,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492720768] [2021-08-26 14:19:04,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492720768] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:19:04,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:19:04,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:19:04,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014518653] [2021-08-26 14:19:04,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 14:19:04,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:19:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 14:19:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,421 INFO L87 Difference]: Start difference. First operand 198 states and 534 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:19:04,444 INFO L93 Difference]: Finished difference Result 362 states and 979 transitions. [2021-08-26 14:19:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 14:19:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-08-26 14:19:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:19:04,446 INFO L225 Difference]: With dead ends: 362 [2021-08-26 14:19:04,447 INFO L226 Difference]: Without dead ends: 362 [2021-08-26 14:19:04,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-26 14:19:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 221. [2021-08-26 14:19:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6772727272727272) internal successors, (589), 220 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 589 transitions. [2021-08-26 14:19:04,460 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 589 transitions. Word has length 11 [2021-08-26 14:19:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:19:04,461 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 589 transitions. [2021-08-26 14:19:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 589 transitions. [2021-08-26 14:19:04,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:19:04,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:19:04,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:19:04,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 14:19:04,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-08-26 14:19:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:19:04,462 INFO L82 PathProgramCache]: Analyzing trace with hash 264610578, now seen corresponding path program 1 times [2021-08-26 14:19:04,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:19:04,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917368132] [2021-08-26 14:19:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:19:04,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:19:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:19:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:19:04,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:19:04,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917368132] [2021-08-26 14:19:04,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917368132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:19:04,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:19:04,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:19:04,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367498871] [2021-08-26 14:19:04,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 14:19:04,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:19:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 14:19:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,507 INFO L87 Difference]: Start difference. First operand 221 states and 589 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:19:04,530 INFO L93 Difference]: Finished difference Result 348 states and 934 transitions. [2021-08-26 14:19:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 14:19:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-08-26 14:19:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:19:04,533 INFO L225 Difference]: With dead ends: 348 [2021-08-26 14:19:04,533 INFO L226 Difference]: Without dead ends: 348 [2021-08-26 14:19:04,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-26 14:19:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 218. [2021-08-26 14:19:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 218 states have (on average 2.5688073394495414) internal successors, (560), 217 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 560 transitions. [2021-08-26 14:19:04,550 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 560 transitions. Word has length 11 [2021-08-26 14:19:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:19:04,550 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 560 transitions. [2021-08-26 14:19:04,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 560 transitions. [2021-08-26 14:19:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:19:04,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:19:04,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:19:04,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 14:19:04,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-08-26 14:19:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:19:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash -556591701, now seen corresponding path program 1 times [2021-08-26 14:19:04,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:19:04,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463150053] [2021-08-26 14:19:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:19:04,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:19:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:19:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:19:04,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:19:04,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463150053] [2021-08-26 14:19:04,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463150053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:19:04,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:19:04,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:19:04,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143704801] [2021-08-26 14:19:04,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 14:19:04,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:19:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 14:19:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,592 INFO L87 Difference]: Start difference. First operand 218 states and 560 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:19:04,625 INFO L93 Difference]: Finished difference Result 234 states and 577 transitions. [2021-08-26 14:19:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 14:19:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 19 [2021-08-26 14:19:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:19:04,627 INFO L225 Difference]: With dead ends: 234 [2021-08-26 14:19:04,627 INFO L226 Difference]: Without dead ends: 234 [2021-08-26 14:19:04,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-26 14:19:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2021-08-26 14:19:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 230 states have (on average 2.473913043478261) internal successors, (569), 229 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 569 transitions. [2021-08-26 14:19:04,636 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 569 transitions. Word has length 19 [2021-08-26 14:19:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:19:04,636 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 569 transitions. [2021-08-26 14:19:04,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 569 transitions. [2021-08-26 14:19:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:19:04,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:19:04,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:19:04,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 14:19:04,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-08-26 14:19:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:19:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1007776461, now seen corresponding path program 2 times [2021-08-26 14:19:04,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:19:04,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557777721] [2021-08-26 14:19:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:19:04,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:19:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:19:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:19:04,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:19:04,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557777721] [2021-08-26 14:19:04,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557777721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:19:04,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:19:04,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:19:04,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721300853] [2021-08-26 14:19:04,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 14:19:04,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:19:04,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 14:19:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,693 INFO L87 Difference]: Start difference. First operand 230 states and 569 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:19:04,726 INFO L93 Difference]: Finished difference Result 228 states and 553 transitions. [2021-08-26 14:19:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 14:19:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 19 [2021-08-26 14:19:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:19:04,728 INFO L225 Difference]: With dead ends: 228 [2021-08-26 14:19:04,728 INFO L226 Difference]: Without dead ends: 228 [2021-08-26 14:19:04,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-26 14:19:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-08-26 14:19:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 228 states have (on average 2.425438596491228) internal successors, (553), 227 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 553 transitions. [2021-08-26 14:19:04,739 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 553 transitions. Word has length 19 [2021-08-26 14:19:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:19:04,739 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 553 transitions. [2021-08-26 14:19:04,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 553 transitions. [2021-08-26 14:19:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:19:04,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:19:04,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:19:04,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 14:19:04,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-08-26 14:19:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:19:04,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2033368335, now seen corresponding path program 3 times [2021-08-26 14:19:04,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:19:04,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204364472] [2021-08-26 14:19:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:19:04,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:19:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:19:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:19:04,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:19:04,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204364472] [2021-08-26 14:19:04,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204364472] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:19:04,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:19:04,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:19:04,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638375778] [2021-08-26 14:19:04,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 14:19:04,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:19:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 14:19:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,798 INFO L87 Difference]: Start difference. First operand 228 states and 553 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:19:04,837 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2021-08-26 14:19:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 14:19:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 19 [2021-08-26 14:19:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:19:04,838 INFO L225 Difference]: With dead ends: 194 [2021-08-26 14:19:04,838 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 14:19:04,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:19:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 14:19:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 14:19:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 14:19:04,839 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-08-26 14:19:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:19:04,839 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 14:19:04,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:19:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 14:19:04,839 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 14:19:04,841 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 14:19:04,842 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 14:19:04,842 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-26 14:19:04,842 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 14:19:04,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 14:19:04,845 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-26 14:19:04,845 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 14:19:04,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:19:04 BasicIcfg [2021-08-26 14:19:04,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 14:19:04,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 14:19:04,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 14:19:04,847 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 14:19:04,847 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:19:02" (3/4) ... [2021-08-26 14:19:04,849 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 14:19:04,853 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2021-08-26 14:19:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 14:19:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 14:19:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 14:19:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 14:19:04,892 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 14:19:04,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 14:19:04,893 INFO L168 Benchmark]: Toolchain (without parser) took 3305.53 ms. Allocated memory was 62.9 MB in the beginning and 113.2 MB in the end (delta: 50.3 MB). Free memory was 41.8 MB in the beginning and 81.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-08-26 14:19:04,894 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 44.0 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:19:04,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.29 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 36.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 14:19:04,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.24 ms. Allocated memory is still 62.9 MB. Free memory was 36.2 MB in the beginning and 34.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:19:04,897 INFO L168 Benchmark]: Boogie Preprocessor took 40.64 ms. Allocated memory is still 62.9 MB. Free memory was 34.5 MB in the beginning and 33.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:19:04,897 INFO L168 Benchmark]: RCFGBuilder took 360.51 ms. Allocated memory is still 62.9 MB. Free memory was 33.0 MB in the beginning and 28.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-08-26 14:19:04,898 INFO L168 Benchmark]: TraceAbstraction took 2421.21 ms. Allocated memory was 62.9 MB in the beginning and 113.2 MB in the end (delta: 50.3 MB). Free memory was 27.6 MB in the beginning and 84.7 MB in the end (delta: -57.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:19:04,898 INFO L168 Benchmark]: Witness Printer took 45.03 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 81.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:19:04,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 44.0 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 385.29 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 36.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.24 ms. Allocated memory is still 62.9 MB. Free memory was 36.2 MB in the beginning and 34.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.64 ms. Allocated memory is still 62.9 MB. Free memory was 34.5 MB in the beginning and 33.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 360.51 ms. Allocated memory is still 62.9 MB. Free memory was 33.0 MB in the beginning and 28.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2421.21 ms. Allocated memory was 62.9 MB in the beginning and 113.2 MB in the end (delta: 50.3 MB). Free memory was 27.6 MB in the beginning and 84.7 MB in the end (delta: -57.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 45.03 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 81.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1574.7ms, 71 PlacesBefore, 35 PlacesAfterwards, 91 TransitionsBefore, 51 TransitionsAfterwards, 2604 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 52 TotalNumberOfCompositions, 5033 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2229, positive: 2085, positive conditional: 0, positive unconditional: 2085, negative: 144, negative conditional: 0, negative unconditional: 144, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1295, positive: 1266, positive conditional: 0, positive unconditional: 1266, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1295, positive: 1231, positive conditional: 0, positive unconditional: 1231, negative: 64, negative conditional: 0, negative unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 64, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 61, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2229, positive: 819, positive conditional: 0, positive unconditional: 819, negative: 115, negative conditional: 0, negative unconditional: 115, unknown: 1295, unknown conditional: 0, unknown unconditional: 1295] , Statistics on independence cache: Total cache size (in pairs): 187, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 2357.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 18.6ms, AutomataDifference: 199.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1622.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 314 SDtfs, 131 SDslu, 117 SDs, 0 SdLazy, 76 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 91.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 275 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.6ms SsaConstructionTime, 75.7ms SatisfiabilityAnalysisTime, 194.4ms InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 108 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-26 14:19:04,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...