./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.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/forester-heap/dll-rb-sentinel-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aa86be9eb0317030839433587db2b1c5b5e93d6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/forester-heap/dll-rb-sentinel-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 9aa86be9eb0317030839433587db2b1c5b5e93d6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:13:07,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:13:07,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:13:07,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:13:07,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:13:07,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:13:07,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:13:07,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:13:07,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:13:07,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:13:07,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:13:07,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:13:07,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:13:07,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:13:07,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:13:07,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:13:07,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:13:07,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:13:07,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:13:07,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:13:07,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:13:07,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:13:07,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:13:07,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:13:07,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:13:07,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:13:07,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:13:07,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:13:07,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:13:07,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:13:07,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:13:07,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:13:07,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:13:07,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:13:07,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:13:07,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:13:07,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:13:07,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:13:07,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:13:07,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:13:07,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:13:07,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:13:08,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:13:08,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:13:08,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:13:08,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:13:08,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:13:08,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:13:08,008 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:13:08,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:13:08,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:13:08,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:13:08,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:13:08,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:13:08,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:13:08,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:13:08,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:13:08,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:13:08,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:13:08,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:13:08,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:13:08,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:13:08,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:13:08,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:13:08,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:13:08,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:13:08,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa86be9eb0317030839433587db2b1c5b5e93d6 [2021-08-26 02:13:08,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:13:08,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:13:08,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:13:08,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:13:08,331 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:13:08,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-26 02:13:08,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aaf75897/7129f9f4ef50418fb2ddabd7fc2784dc/FLAG0f8cb640d [2021-08-26 02:13:08,915 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:13:08,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-26 02:13:08,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aaf75897/7129f9f4ef50418fb2ddabd7fc2784dc/FLAG0f8cb640d [2021-08-26 02:13:09,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aaf75897/7129f9f4ef50418fb2ddabd7fc2784dc [2021-08-26 02:13:09,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:13:09,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:13:09,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:13:09,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:13:09,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:13:09,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63efb4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09, skipping insertion in model container [2021-08-26 02:13:09,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:13:09,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:13:09,756 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/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-26 02:13:09,762 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/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-26 02:13:09,763 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/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-26 02:13:09,764 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/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-26 02:13:09,765 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/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-26 02:13:09,767 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/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-26 02:13:09,769 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/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-26 02:13:09,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:13:09,783 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:13:09,825 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/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-26 02:13:09,826 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/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-26 02:13:09,827 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/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-26 02:13:09,831 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/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-26 02:13:09,834 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/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-26 02:13:09,836 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/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-26 02:13:09,836 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/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-26 02:13:09,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:13:09,867 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:13:09,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09 WrapperNode [2021-08-26 02:13:09,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:13:09,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:13:09,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:13:09,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:13:09,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:13:09,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:13:09,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:13:09,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:13:09,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:13:09,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:13:09,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:13:09,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:13:09,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (1/1) ... [2021-08-26 02:13:09,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:13:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:10,014 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 02:13:10,022 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 02:13:10,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:13:10,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:13:10,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:13:10,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:13:10,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:13:10,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:13:10,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:13:10,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:13:10,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:13:10,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:13:10,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:13:10,490 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-26 02:13:10,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:10 BoogieIcfgContainer [2021-08-26 02:13:10,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:13:10,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:13:10,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:13:10,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:13:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:13:09" (1/3) ... [2021-08-26 02:13:10,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7459d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:10, skipping insertion in model container [2021-08-26 02:13:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:09" (2/3) ... [2021-08-26 02:13:10,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7459d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:10, skipping insertion in model container [2021-08-26 02:13:10,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:10" (3/3) ... [2021-08-26 02:13:10,498 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-08-26 02:13:10,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:13:10,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-26 02:13:10,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:13:10,542 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 02:13:10,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-26 02:13:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 46 states have internal predecessors, (76), 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 02:13:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:13:10,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:10,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:13:10,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash 891600134, now seen corresponding path program 1 times [2021-08-26 02:13:10,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:10,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803583666] [2021-08-26 02:13:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:10,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:10,703 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 02:13:10,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:10,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803583666] [2021-08-26 02:13:10,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803583666] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:10,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:10,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:13:10,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888158923] [2021-08-26 02:13:10,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:13:10,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:13:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:13:10,723 INFO L87 Difference]: Start difference. First operand has 47 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 46 states have internal predecessors, (76), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:13:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:10,737 INFO L93 Difference]: Finished difference Result 92 states and 150 transitions. [2021-08-26 02:13:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:13:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 02:13:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:10,745 INFO L225 Difference]: With dead ends: 92 [2021-08-26 02:13:10,746 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 02:13:10,748 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 02:13:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 02:13:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-26 02:13:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 40 states have internal predecessors, (44), 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 02:13:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-26 02:13:10,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 6 [2021-08-26 02:13:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:10,777 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-26 02:13:10,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:13:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-26 02:13:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:13:10,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:10,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:10,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:13:10,779 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1806905862, now seen corresponding path program 1 times [2021-08-26 02:13:10,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:10,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172719870] [2021-08-26 02:13:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:10,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:10,914 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 02:13:10,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172719870] [2021-08-26 02:13:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172719870] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:10,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:10,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:13:10,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613157726] [2021-08-26 02:13:10,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:10,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:10,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:10,919 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:13:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:11,020 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-08-26 02:13:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-08-26 02:13:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:11,022 INFO L225 Difference]: With dead ends: 47 [2021-08-26 02:13:11,022 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 02:13:11,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 02:13:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-08-26 02:13:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 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 02:13:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-26 02:13:11,037 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 7 [2021-08-26 02:13:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:11,038 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-26 02:13:11,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:13:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-26 02:13:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 02:13:11,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:11,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:11,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:13:11,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash 179566605, now seen corresponding path program 1 times [2021-08-26 02:13:11,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:11,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554635686] [2021-08-26 02:13:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:11,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:11,148 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 02:13:11,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:11,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554635686] [2021-08-26 02:13:11,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554635686] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:11,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:11,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:13:11,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842320487] [2021-08-26 02:13:11,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:11,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:11,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:11,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:11,152 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 02:13:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:11,217 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-08-26 02:13:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-26 02:13:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:11,218 INFO L225 Difference]: With dead ends: 39 [2021-08-26 02:13:11,218 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 02:13:11,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 02:13:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-26 02:13:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 36 states have internal predecessors, (40), 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 02:13:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-26 02:13:11,223 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 8 [2021-08-26 02:13:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-26 02:13:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 02:13:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-26 02:13:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:13:11,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:11,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:11,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:13:11,225 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:11,225 INFO L82 PathProgramCache]: Analyzing trace with hash 711412120, now seen corresponding path program 1 times [2021-08-26 02:13:11,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:11,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472981950] [2021-08-26 02:13:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:11,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:11,287 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 02:13:11,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:11,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472981950] [2021-08-26 02:13:11,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472981950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:11,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:11,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:13:11,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793903428] [2021-08-26 02:13:11,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:13:11,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:13:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:11,290 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 02:13:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:11,416 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-08-26 02:13:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:13:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-08-26 02:13:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:11,418 INFO L225 Difference]: With dead ends: 62 [2021-08-26 02:13:11,418 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 02:13:11,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:13:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 02:13:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2021-08-26 02:13:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 43 states have internal predecessors, (48), 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 02:13:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-08-26 02:13:11,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 10 [2021-08-26 02:13:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:11,423 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-08-26 02:13:11,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 02:13:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-08-26 02:13:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 02:13:11,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:11,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:11,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 02:13:11,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2056579816, now seen corresponding path program 1 times [2021-08-26 02:13:11,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:11,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770915866] [2021-08-26 02:13:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:11,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:11,484 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 02:13:11,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:11,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770915866] [2021-08-26 02:13:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770915866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:11,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:11,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:13:11,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128357927] [2021-08-26 02:13:11,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:11,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:11,487 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:13:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:11,574 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-26 02:13:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:13:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:11,575 INFO L225 Difference]: With dead ends: 44 [2021-08-26 02:13:11,576 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 02:13:11,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 02:13:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 02:13:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 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 02:13:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-08-26 02:13:11,588 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 11 [2021-08-26 02:13:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-08-26 02:13:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:13:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-08-26 02:13:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 02:13:11,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:11,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 02:13:11,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -688119236, now seen corresponding path program 1 times [2021-08-26 02:13:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:11,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271650941] [2021-08-26 02:13:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:11,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:11,703 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 02:13:11,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:11,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271650941] [2021-08-26 02:13:11,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271650941] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:11,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:11,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:13:11,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010708388] [2021-08-26 02:13:11,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:11,706 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 02:13:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:11,749 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-08-26 02:13:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-08-26 02:13:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:11,750 INFO L225 Difference]: With dead ends: 42 [2021-08-26 02:13:11,750 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:13:11,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:13:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-26 02:13:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 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 02:13:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-26 02:13:11,754 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 13 [2021-08-26 02:13:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:11,754 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-26 02:13:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 02:13:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-26 02:13:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 02:13:11,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:11,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:11,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 02:13:11,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1285114177, now seen corresponding path program 1 times [2021-08-26 02:13:11,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:11,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719689553] [2021-08-26 02:13:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:11,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:11,857 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 02:13:11,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:11,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719689553] [2021-08-26 02:13:11,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719689553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:11,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:11,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:13:11,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291613880] [2021-08-26 02:13:11,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:13:11,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:13:11,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:11,868 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 02:13:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:11,958 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-08-26 02:13:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:13:11,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-08-26 02:13:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:11,959 INFO L225 Difference]: With dead ends: 55 [2021-08-26 02:13:11,959 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 02:13:11,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:13:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 02:13:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-08-26 02:13:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 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 02:13:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-08-26 02:13:11,963 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 14 [2021-08-26 02:13:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:11,963 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-08-26 02:13:11,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 02:13:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-08-26 02:13:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 02:13:11,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:11,964 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:11,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-26 02:13:11,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1621160418, now seen corresponding path program 1 times [2021-08-26 02:13:11,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:11,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11573342] [2021-08-26 02:13:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:11,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:12,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:12,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11573342] [2021-08-26 02:13:12,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11573342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:12,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512275530] [2021-08-26 02:13:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:12,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:12,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:12,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:12,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:13:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:13:12,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:12,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-08-26 02:13:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:12,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-08-26 02:13:12,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:13:12,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-08-26 02:13:12,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:13:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-26 02:13:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512275530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:12,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-26 02:13:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822816897] [2021-08-26 02:13:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:13:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:13:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:13:12,602 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 02:13:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:12,775 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-08-26 02:13:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:13:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 17 [2021-08-26 02:13:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:12,776 INFO L225 Difference]: With dead ends: 59 [2021-08-26 02:13:12,776 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 02:13:12,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-26 02:13:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 02:13:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-26 02:13:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 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 02:13:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-26 02:13:12,780 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2021-08-26 02:13:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:12,780 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-26 02:13:12,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 02:13:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-26 02:13:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:13:12,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:12,781 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:12,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:13,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:13,004 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1036168340, now seen corresponding path program 1 times [2021-08-26 02:13:13,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:13,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084468681] [2021-08-26 02:13:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:13,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:13,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:13,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084468681] [2021-08-26 02:13:13,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084468681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:13,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365191558] [2021-08-26 02:13:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:13,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:13,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:13,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:13:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 02:13:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:13:13,333 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-26 02:13:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-08-26 02:13:13,535 INFO L354 Elim1Store]: treesize reduction 193, result has 12.7 percent of original size [2021-08-26 02:13:13,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 74 [2021-08-26 02:13:13,564 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:13:13,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-08-26 02:13:13,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-08-26 02:13:13,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:13:13,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 02:13:13,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910101918] [2021-08-26 02:13:13,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:13:13,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:13:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-26 02:13:13,672 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 02:13:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:13:13,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:13,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 02:13:13,897 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a3375dd at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-26 02:13:13,901 INFO L168 Benchmark]: Toolchain (without parser) took 4497.87 ms. Allocated memory was 73.4 MB in the beginning and 121.6 MB in the end (delta: 48.2 MB). Free memory was 54.4 MB in the beginning and 56.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 47.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:13,901 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 73.4 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:13:13,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.45 ms. Allocated memory is still 73.4 MB. Free memory was 54.1 MB in the beginning and 48.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:13,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.18 ms. Allocated memory is still 73.4 MB. Free memory was 48.6 MB in the beginning and 46.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:13,902 INFO L168 Benchmark]: Boogie Preprocessor took 55.92 ms. Allocated memory is still 73.4 MB. Free memory was 46.3 MB in the beginning and 44.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:13,902 INFO L168 Benchmark]: RCFGBuilder took 504.21 ms. Allocated memory is still 73.4 MB. Free memory was 44.5 MB in the beginning and 37.9 MB in the end (delta: 6.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:13,903 INFO L168 Benchmark]: TraceAbstraction took 3406.90 ms. Allocated memory was 73.4 MB in the beginning and 121.6 MB in the end (delta: 48.2 MB). Free memory was 37.6 MB in the beginning and 56.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:13,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 73.4 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 464.45 ms. Allocated memory is still 73.4 MB. Free memory was 54.1 MB in the beginning and 48.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.18 ms. Allocated memory is still 73.4 MB. Free memory was 48.6 MB in the beginning and 46.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.92 ms. Allocated memory is still 73.4 MB. Free memory was 46.3 MB in the beginning and 44.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 504.21 ms. Allocated memory is still 73.4 MB. Free memory was 44.5 MB in the beginning and 37.9 MB in the end (delta: 6.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3406.90 ms. Allocated memory was 73.4 MB in the beginning and 121.6 MB in the end (delta: 48.2 MB). Free memory was 37.6 MB in the beginning and 56.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a3375dd de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a3375dd: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-26 02:13:13,935 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:13:15,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:13:15,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:13:15,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:13:15,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:13:15,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:13:15,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:13:15,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:13:15,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:13:15,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:13:15,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:13:15,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:13:15,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:13:15,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:13:15,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:13:15,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:13:15,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:13:15,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:13:15,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:13:15,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:13:15,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:13:15,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:13:15,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:13:15,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:13:15,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:13:15,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:13:15,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:13:15,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:13:15,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:13:15,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:13:15,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:13:15,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:13:15,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:13:15,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:13:15,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:13:15,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:13:15,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:13:15,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:13:15,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:13:15,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:13:15,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:13:15,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 02:13:15,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:13:15,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:13:15,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:13:15,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:13:15,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:13:15,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:13:15,849 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:13:15,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:13:15,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:13:15,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:13:15,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:13:15,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:13:15,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:13:15,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:13:15,851 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 02:13:15,851 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 02:13:15,852 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:13:15,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:13:15,852 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:13:15,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:13:15,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:13:15,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:13:15,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 02:13:15,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:13:15,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:13:15,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 02:13:15,854 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa86be9eb0317030839433587db2b1c5b5e93d6 [2021-08-26 02:13:16,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:13:16,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:13:16,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:13:16,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:13:16,193 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:13:16,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-26 02:13:16,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07169f2f4/ad8260e7de5848d0a65f846ef28e72c4/FLAG3d1de5baf [2021-08-26 02:13:16,755 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:13:16,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-26 02:13:16,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07169f2f4/ad8260e7de5848d0a65f846ef28e72c4/FLAG3d1de5baf [2021-08-26 02:13:17,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07169f2f4/ad8260e7de5848d0a65f846ef28e72c4 [2021-08-26 02:13:17,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:13:17,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:13:17,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:13:17,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:13:17,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:13:17,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af15a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17, skipping insertion in model container [2021-08-26 02:13:17,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:13:17,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:13:17,402 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/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-26 02:13:17,407 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/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-26 02:13:17,408 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/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-26 02:13:17,409 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/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-26 02:13:17,410 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/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-26 02:13:17,413 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/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-26 02:13:17,414 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/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-26 02:13:17,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:13:17,435 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:13:17,489 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/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-26 02:13:17,490 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/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-26 02:13:17,490 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/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-26 02:13:17,491 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/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-26 02:13:17,495 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/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-26 02:13:17,497 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/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-26 02:13:17,499 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/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-26 02:13:17,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:13:17,535 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:13:17,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17 WrapperNode [2021-08-26 02:13:17,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:13:17,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:13:17,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:13:17,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:13:17,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:13:17,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:13:17,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:13:17,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:13:17,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:13:17,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:13:17,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:13:17,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:13:17,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (1/1) ... [2021-08-26 02:13:17,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:13:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:17,694 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 02:13:17,696 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 02:13:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 02:13:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:13:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:13:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:13:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:13:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:13:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 02:13:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 02:13:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:13:18,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:13:18,800 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-26 02:13:18,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:18 BoogieIcfgContainer [2021-08-26 02:13:18,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:13:18,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:13:18,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:13:18,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:13:18,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:13:17" (1/3) ... [2021-08-26 02:13:18,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e017121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:18, skipping insertion in model container [2021-08-26 02:13:18,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:17" (2/3) ... [2021-08-26 02:13:18,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e017121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:18, skipping insertion in model container [2021-08-26 02:13:18,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:18" (3/3) ... [2021-08-26 02:13:18,808 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-08-26 02:13:18,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:13:18,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-26 02:13:18,842 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:13:18,847 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 02:13:18,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-26 02:13:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 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 02:13:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:13:18,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:18,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:13:18,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash 891569350, now seen corresponding path program 1 times [2021-08-26 02:13:18,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:18,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282477583] [2021-08-26 02:13:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:18,883 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:18,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:18,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:18,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 02:13:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 02:13:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:19,109 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 02:13:19,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:19,143 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 02:13:19,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:19,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282477583] [2021-08-26 02:13:19,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282477583] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:19,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:19,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 02:13:19,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417848983] [2021-08-26 02:13:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:13:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:13:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:13:19,165 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:13:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:19,184 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2021-08-26 02:13:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:13:19,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 02:13:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:19,191 INFO L225 Difference]: With dead ends: 90 [2021-08-26 02:13:19,192 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:13:19,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 02:13:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:13:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-26 02:13:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 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 02:13:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-08-26 02:13:19,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 6 [2021-08-26 02:13:19,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:19,224 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-08-26 02:13:19,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:13:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-08-26 02:13:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:13:19,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:19,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:13:19,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:19,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:19,436 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:19,437 INFO L82 PathProgramCache]: Analyzing trace with hash 889692517, now seen corresponding path program 1 times [2021-08-26 02:13:19,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:19,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141777215] [2021-08-26 02:13:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:19,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:19,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:19,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 02:13:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:13:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:19,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-08-26 02:13:19,648 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 02:13:19,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:19,699 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 02:13:19,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:19,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141777215] [2021-08-26 02:13:19,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141777215] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:19,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:19,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-26 02:13:19,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899913265] [2021-08-26 02:13:19,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:19,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:19,711 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 02:13:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:20,253 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-08-26 02:13:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-08-26 02:13:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:20,261 INFO L225 Difference]: With dead ends: 45 [2021-08-26 02:13:20,261 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 02:13:20,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 02:13:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-26 02:13:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 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 02:13:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-08-26 02:13:20,268 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 6 [2021-08-26 02:13:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:20,268 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-08-26 02:13:20,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 02:13:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-08-26 02:13:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:13:20,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:20,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:20,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-08-26 02:13:20,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:20,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:20,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723981, now seen corresponding path program 1 times [2021-08-26 02:13:20,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:20,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146689000] [2021-08-26 02:13:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:20,487 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:20,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:20,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:20,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 02:13:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:13:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:13:20,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-26 02:13:20,697 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 02:13:20,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:20,735 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 02:13:20,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:20,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146689000] [2021-08-26 02:13:20,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146689000] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:20,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:20,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-26 02:13:20,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923739381] [2021-08-26 02:13:20,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:20,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:20,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:20,738 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:13:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:20,966 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-26 02:13:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-08-26 02:13:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:20,967 INFO L225 Difference]: With dead ends: 38 [2021-08-26 02:13:20,973 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 02:13:20,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 02:13:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-26 02:13:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 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 02:13:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-08-26 02:13:20,977 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 7 [2021-08-26 02:13:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:20,977 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-08-26 02:13:20,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:13:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-08-26 02:13:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 02:13:20,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:20,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:20,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:21,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:21,192 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash 590587384, now seen corresponding path program 1 times [2021-08-26 02:13:21,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:21,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851580137] [2021-08-26 02:13:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:21,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:21,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:21,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 02:13:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:21,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:13:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:21,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:13:21,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:13:21,480 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 02:13:21,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:21,568 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 02:13:21,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:21,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851580137] [2021-08-26 02:13:21,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851580137] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:21,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:21,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-08-26 02:13:21,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761985201] [2021-08-26 02:13:21,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:13:21,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:13:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:13:21,572 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 02:13:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:22,883 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-08-26 02:13:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 02:13:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 02:13:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:22,884 INFO L225 Difference]: With dead ends: 75 [2021-08-26 02:13:22,885 INFO L226 Difference]: Without dead ends: 73 [2021-08-26 02:13:22,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:13:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-26 02:13:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-08-26 02:13:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 51 states have internal predecessors, (60), 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 02:13:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-08-26 02:13:22,891 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 9 [2021-08-26 02:13:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:22,891 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-08-26 02:13:22,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 02:13:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-08-26 02:13:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:13:22,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:22,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:22,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:23,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1507179337, now seen corresponding path program 1 times [2021-08-26 02:13:23,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:23,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137505221] [2021-08-26 02:13:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:23,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:23,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:23,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-26 02:13:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 02:13:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:24,344 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-08-26 02:13:24,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 126 [2021-08-26 02:13:24,893 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-08-26 02:13:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 111 [2021-08-26 02:13:27,707 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:27,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137505221] [2021-08-26 02:13:27,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:13:27,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614976807] [2021-08-26 02:13:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:27,709 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:13:27,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:13:27,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:13:27,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-08-26 02:13:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:13:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:27,923 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-26 02:13:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-08-26 02:13:28,007 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-08-26 02:13:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 70 [2021-08-26 02:13:28,567 INFO L354 Elim1Store]: treesize reduction 187, result has 14.6 percent of original size [2021-08-26 02:13:28,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 204 treesize of output 165 [2021-08-26 02:13:28,653 INFO L354 Elim1Store]: treesize reduction 220, result has 18.8 percent of original size [2021-08-26 02:13:28,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 158 [2021-08-26 02:13:28,694 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:13:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 189 [2021-08-26 02:13:30,193 INFO L354 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2021-08-26 02:13:30,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 101 [2021-08-26 02:13:30,201 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:13:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 66 [2021-08-26 02:13:30,332 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 02:13:30,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:30,769 INFO L354 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2021-08-26 02:13:30,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 385 treesize of output 1 [2021-08-26 02:13:30,783 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 02:13:30,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614976807] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:30,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:30,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-08-26 02:13:30,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151425514] [2021-08-26 02:13:30,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 02:13:30,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 02:13:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:13:30,786 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 02:13:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:34,257 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-08-26 02:13:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:13:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 10 [2021-08-26 02:13:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:34,258 INFO L225 Difference]: With dead ends: 53 [2021-08-26 02:13:34,258 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 02:13:34,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:13:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 02:13:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-08-26 02:13:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 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 02:13:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-08-26 02:13:34,265 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 10 [2021-08-26 02:13:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:34,265 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-08-26 02:13:34,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 02:13:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-08-26 02:13:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 02:13:34,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:34,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:34,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-08-26 02:13:34,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-08-26 02:13:34,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:34,669 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2079156959, now seen corresponding path program 1 times [2021-08-26 02:13:34,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:34,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355924106] [2021-08-26 02:13:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:34,670 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:34,671 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:34,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-26 02:13:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:13:34,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:13:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:13:34,948 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 02:13:34,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:35,049 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 02:13:35,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:35,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355924106] [2021-08-26 02:13:35,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355924106] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:35,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:35,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-26 02:13:35,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133413137] [2021-08-26 02:13:35,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 02:13:35,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 02:13:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:13:35,053 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 02:13:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:37,472 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-08-26 02:13:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 02:13:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 13 [2021-08-26 02:13:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:37,473 INFO L225 Difference]: With dead ends: 77 [2021-08-26 02:13:37,473 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 02:13:37,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:13:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 02:13:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-08-26 02:13:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 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 02:13:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-08-26 02:13:37,479 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 13 [2021-08-26 02:13:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:37,479 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-08-26 02:13:37,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 02:13:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-08-26 02:13:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:13:37,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:37,484 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:37,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:37,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:37,684 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash -734247455, now seen corresponding path program 1 times [2021-08-26 02:13:37,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:37,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345545006] [2021-08-26 02:13:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:37,685 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:37,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:37,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-26 02:13:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 02:13:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:37,891 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-08-26 02:13:37,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 17 [2021-08-26 02:13:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:37,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-08-26 02:13:38,210 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-26 02:13:38,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-08-26 02:13:38,218 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-26 02:13:38,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-08-26 02:13:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:38,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:13:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:38,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:38,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345545006] [2021-08-26 02:13:38,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345545006] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:13:38,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:38,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-26 02:13:38,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524268638] [2021-08-26 02:13:38,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 02:13:38,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:13:38,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 02:13:38,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:13:38,405 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 02:13:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:39,802 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-08-26 02:13:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:13:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 16 [2021-08-26 02:13:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:39,804 INFO L225 Difference]: With dead ends: 73 [2021-08-26 02:13:39,804 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 02:13:39,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:13:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 02:13:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-26 02:13:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 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 02:13:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-08-26 02:13:39,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 16 [2021-08-26 02:13:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:39,809 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-08-26 02:13:39,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 02:13:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-08-26 02:13:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 02:13:39,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:39,810 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 02:13:39,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:40,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:40,011 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:13:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:40,011 INFO L82 PathProgramCache]: Analyzing trace with hash -587248931, now seen corresponding path program 1 times [2021-08-26 02:13:40,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:13:40,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398697041] [2021-08-26 02:13:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:40,012 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:13:40,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:13:40,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:13:40,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-26 02:13:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 02:13:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:40,293 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-26 02:13:40,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-08-26 02:13:40,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:13:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:40,427 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-08-26 02:13:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 53 [2021-08-26 02:13:40,445 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-26 02:13:40,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2021-08-26 02:13:40,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:13:40,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398697041] [2021-08-26 02:13:40,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-08-26 02:13:40,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334635407] [2021-08-26 02:13:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:40,539 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:13:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:13:40,553 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:13:40,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-08-26 02:13:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 02:13:40,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7c53365 [2021-08-26 02:13:40,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691167767] [2021-08-26 02:13:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:40,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:40,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:40,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 02:13:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 02:13:41,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7c53365 [2021-08-26 02:13:41,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:41,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 02:13:41,105 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 02:13:41,105 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 02:13:41,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:13:41,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:41,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:41,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-08-26 02:13:41,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:13:41,717 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:13:41,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:13:41 BoogieIcfgContainer [2021-08-26 02:13:41,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:13:41,727 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:13:41,727 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:13:41,728 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:13:41,728 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:18" (3/4) ... [2021-08-26 02:13:41,730 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 02:13:41,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:13:41,731 INFO L168 Benchmark]: Toolchain (without parser) took 24652.86 ms. Allocated memory was 56.6 MB in the beginning and 134.2 MB in the end (delta: 77.6 MB). Free memory was 34.0 MB in the beginning and 75.8 MB in the end (delta: -41.8 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:41,731 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 56.6 MB. Free memory was 38.5 MB in the beginning and 38.5 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:13:41,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.04 ms. Allocated memory is still 56.6 MB. Free memory was 33.8 MB in the beginning and 31.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:41,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.30 ms. Allocated memory is still 56.6 MB. Free memory was 31.8 MB in the beginning and 29.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:41,732 INFO L168 Benchmark]: Boogie Preprocessor took 56.79 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 27.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:41,732 INFO L168 Benchmark]: RCFGBuilder took 1139.46 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 27.4 MB in the beginning and 50.4 MB in the end (delta: -23.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:41,732 INFO L168 Benchmark]: TraceAbstraction took 22923.81 ms. Allocated memory was 75.5 MB in the beginning and 134.2 MB in the end (delta: 58.7 MB). Free memory was 50.0 MB in the beginning and 75.8 MB in the end (delta: -25.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:13:41,733 INFO L168 Benchmark]: Witness Printer took 2.89 ms. Allocated memory is still 134.2 MB. Free memory is still 75.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:13:41,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 56.6 MB. Free memory was 38.5 MB in the beginning and 38.5 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 455.04 ms. Allocated memory is still 56.6 MB. Free memory was 33.8 MB in the beginning and 31.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.30 ms. Allocated memory is still 56.6 MB. Free memory was 31.8 MB in the beginning and 29.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.79 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 27.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1139.46 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 27.4 MB in the beginning and 50.4 MB in the end (delta: -23.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22923.81 ms. Allocated memory was 75.5 MB in the beginning and 134.2 MB in the end (delta: 58.7 MB). Free memory was 50.0 MB in the beginning and 75.8 MB in the end (delta: -25.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. * Witness Printer took 2.89 ms. Allocated memory is still 134.2 MB. Free memory is still 75.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - UnprovableResult [Line: 1042]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) [L1000] null->prev = ((void*)0) [L1001] null->colour = BLACK [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null [L1005] list->prev = null [L1006] list->colour = BLACK [L1008] struct TSLL* end = list; [L1011] COND TRUE __VERIFIER_nondet_int() [L1014] end->next = malloc(sizeof(struct TSLL)) [L1015] EXPR end->next [L1015] end->next->prev = end [L1016] EXPR end->next [L1016] end = end->next [L1017] end->next = null [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end->colour = RED [L1026] end->next = malloc(sizeof(struct TSLL)) [L1027] EXPR end->next [L1027] end->next->prev = end [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = null [L1030] end->colour = BLACK [L1032] EXPR end->colour [L1032] COND FALSE !(!(BLACK == end->colour)) [L1033] EXPR end->next [L1033] COND FALSE !(!(null == end->next)) [L1034] COND FALSE !(!(null != end)) [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list [L1041] COND FALSE !(!(null != end)) [L1042] EXPR end->colour [L1042] COND TRUE !(BLACK == end->colour) [L1042] reach_error() - UnprovableResult [Line: 1032]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 22875.4ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 11.7ms, AutomataDifference: 9446.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 223 SDtfs, 195 SDslu, 442 SDs, 0 SdLazy, 372 SolverSat, 59 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 8640.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 784.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 110.8ms SsaConstructionTime, 262.1ms SatisfiabilityAnalysisTime, 4297.8ms InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 120 ConstructedInterpolants, 5 QuantifiedInterpolants, 1541 SizeOfPredicates, 26 NumberOfNonLiveVariables, 398 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 2/4 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 02:13:41,766 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...