./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.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 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:37:31,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:37:31,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:37:31,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:37:31,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:37:31,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:37:31,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:37:31,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:37:31,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:37:31,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:37:31,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:37:31,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:37:31,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:37:31,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:37:31,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:37:31,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:37:31,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:37:31,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:37:31,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:37:31,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:37:31,849 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:37:31,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:37:31,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:37:31,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:37:31,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:37:31,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:37:31,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:37:31,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:37:31,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:37:31,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:37:31,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:37:31,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:37:31,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:37:31,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:37:31,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:37:31,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:37:31,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:37:31,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:37:31,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:37:31,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:37:31,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:37:31,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:37:31,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:37:31,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:37:31,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:37:31,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:37:31,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:37:31,902 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:37:31,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:37:31,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:37:31,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:37:31,903 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:37:31,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:37:31,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:37:31,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:37:31,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:37:31,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:37:31,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:37:31,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:37:31,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:37:31,905 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:37:31,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:37:31,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:37:31,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:37:31,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:37:31,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:37:31,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:37:31,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:37:31,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:37:31,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:37:31,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:37:31,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:37:31,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:37:31,908 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:37:31,908 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:37:31,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:37:31,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f [2022-07-19 14:37:32,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:37:32,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:37:32,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:37:32,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:37:32,162 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:37:32,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2022-07-19 14:37:32,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8c6735e/87d3c4cead2044148a7562d56420750e/FLAG646a26644 [2022-07-19 14:37:32,748 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:37:32,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2022-07-19 14:37:32,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8c6735e/87d3c4cead2044148a7562d56420750e/FLAG646a26644 [2022-07-19 14:37:33,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8c6735e/87d3c4cead2044148a7562d56420750e [2022-07-19 14:37:33,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:37:33,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:37:33,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:37:33,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:37:33,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:37:33,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a4340c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33, skipping insertion in model container [2022-07-19 14:37:33,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:37:33,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:37:33,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2022-07-19 14:37:33,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2022-07-19 14:37:33,603 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2022-07-19 14:37:33,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:37:33,619 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:37:33,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2022-07-19 14:37:33,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2022-07-19 14:37:33,687 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2022-07-19 14:37:33,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:37:33,719 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:37:33,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33 WrapperNode [2022-07-19 14:37:33,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:37:33,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:37:33,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:37:33,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:37:33,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,795 INFO L137 Inliner]: procedures = 142, calls = 63, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 162 [2022-07-19 14:37:33,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:37:33,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:37:33,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:37:33,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:37:33,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:37:33,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:37:33,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:37:33,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:37:33,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (1/1) ... [2022-07-19 14:37:33,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:37:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:37:33,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 14:37:33,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 14:37:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-19 14:37:33,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-19 14:37:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2022-07-19 14:37:33,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2022-07-19 14:37:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 14:37:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:37:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 14:37:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2022-07-19 14:37:33,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2022-07-19 14:37:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 14:37:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 14:37:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 14:37:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-19 14:37:33,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-19 14:37:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:37:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2022-07-19 14:37:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2022-07-19 14:37:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:37:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:37:34,105 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:37:34,106 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:37:34,387 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:37:34,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:37:34,395 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 14:37:34,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:37:34 BoogieIcfgContainer [2022-07-19 14:37:34,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:37:34,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:37:34,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:37:34,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:37:34,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:37:33" (1/3) ... [2022-07-19 14:37:34,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bbde9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:37:34, skipping insertion in model container [2022-07-19 14:37:34,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:37:33" (2/3) ... [2022-07-19 14:37:34,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bbde9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:37:34, skipping insertion in model container [2022-07-19 14:37:34,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:37:34" (3/3) ... [2022-07-19 14:37:34,407 INFO L111 eAbstractionObserver]: Analyzing ICFG test_mutex_unbounded-2.i [2022-07-19 14:37:34,419 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:37:34,420 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-19 14:37:34,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:37:34,498 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e299bee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52b2528d [2022-07-19 14:37:34,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 14:37:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 62 states have internal predecessors, (78), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 14:37:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 14:37:34,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:37:34,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:37:34,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:37:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:37:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash -840575259, now seen corresponding path program 1 times [2022-07-19 14:37:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:37:34,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446134599] [2022-07-19 14:37:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:37:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:34,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:37:34,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446134599] [2022-07-19 14:37:34,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446134599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:37:34,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:37:34,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 14:37:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654548048] [2022-07-19 14:37:34,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:37:34,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 14:37:34,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:37:34,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 14:37:34,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:37:34,729 INFO L87 Difference]: Start difference. First operand has 77 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 62 states have internal predecessors, (78), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-07-19 14:37:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:37:34,765 INFO L93 Difference]: Finished difference Result 151 states and 198 transitions. [2022-07-19 14:37:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 14:37:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2022-07-19 14:37:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:37:34,775 INFO L225 Difference]: With dead ends: 151 [2022-07-19 14:37:34,776 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 14:37:34,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:37:34,783 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:37:34,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:37:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 14:37:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-19 14:37:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 14:37:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-07-19 14:37:34,842 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2022-07-19 14:37:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:37:34,842 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-07-19 14:37:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-07-19 14:37:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-07-19 14:37:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 14:37:34,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:37:34,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:37:34,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:37:34,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:37:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:37:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash 992690414, now seen corresponding path program 1 times [2022-07-19 14:37:34,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:37:34,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118156509] [2022-07-19 14:37:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:37:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:35,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:37:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118156509] [2022-07-19 14:37:35,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118156509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:37:35,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:37:35,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 14:37:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219091185] [2022-07-19 14:37:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:37:35,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:37:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:37:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:37:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:37:35,042 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-07-19 14:37:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:37:35,276 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2022-07-19 14:37:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 14:37:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 [2022-07-19 14:37:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:37:35,284 INFO L225 Difference]: With dead ends: 129 [2022-07-19 14:37:35,285 INFO L226 Difference]: Without dead ends: 123 [2022-07-19 14:37:35,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 14:37:35,287 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 60 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:37:35,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 369 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:37:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-19 14:37:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2022-07-19 14:37:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 81 states have internal predecessors, (95), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 14:37:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-07-19 14:37:35,324 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 13 [2022-07-19 14:37:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:37:35,324 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-07-19 14:37:35,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-07-19 14:37:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-07-19 14:37:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 14:37:35,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:37:35,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:37:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 14:37:35,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:37:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:37:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash 194685096, now seen corresponding path program 1 times [2022-07-19 14:37:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:37:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859787960] [2022-07-19 14:37:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:37:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 14:37:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:35,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:37:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859787960] [2022-07-19 14:37:35,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859787960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:37:35,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:37:35,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 14:37:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122971011] [2022-07-19 14:37:35,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:37:35,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 14:37:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:37:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 14:37:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:37:35,405 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:37:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:37:35,441 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2022-07-19 14:37:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 14:37:35,442 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-19 14:37:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:37:35,443 INFO L225 Difference]: With dead ends: 109 [2022-07-19 14:37:35,444 INFO L226 Difference]: Without dead ends: 107 [2022-07-19 14:37:35,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:37:35,447 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:37:35,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:37:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-19 14:37:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-07-19 14:37:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.216867469879518) internal successors, (101), 87 states have internal predecessors, (101), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-19 14:37:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2022-07-19 14:37:35,462 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 15 [2022-07-19 14:37:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:37:35,463 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2022-07-19 14:37:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:37:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2022-07-19 14:37:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 14:37:35,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:37:35,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:37:35,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 14:37:35,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:37:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:37:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1769288401, now seen corresponding path program 1 times [2022-07-19 14:37:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:37:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205003605] [2022-07-19 14:37:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:37:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 14:37:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:35,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:37:35,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205003605] [2022-07-19 14:37:35,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205003605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:37:35,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:37:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 14:37:35,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174539033] [2022-07-19 14:37:35,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:37:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 14:37:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:37:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 14:37:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:37:35,562 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:37:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:37:35,672 INFO L93 Difference]: Finished difference Result 186 states and 225 transitions. [2022-07-19 14:37:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:37:35,673 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-19 14:37:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:37:35,674 INFO L225 Difference]: With dead ends: 186 [2022-07-19 14:37:35,674 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 14:37:35,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:37:35,684 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:37:35,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 207 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:37:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 14:37:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-07-19 14:37:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-19 14:37:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-07-19 14:37:35,692 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 15 [2022-07-19 14:37:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:37:35,693 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-07-19 14:37:35,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:37:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-07-19 14:37:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 14:37:35,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:37:35,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:37:35,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 14:37:35,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:37:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:37:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1822538755, now seen corresponding path program 1 times [2022-07-19 14:37:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:37:35,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166737230] [2022-07-19 14:37:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:35,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:37:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 14:37:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 14:37:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 14:37:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:35,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:37:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166737230] [2022-07-19 14:37:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166737230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:37:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485074946] [2022-07-19 14:37:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:35,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:37:35,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:37:35,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:37:35,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 14:37:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 14:37:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:37:36,324 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 14:37:36,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-07-19 14:37:36,594 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-19 14:37:36,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-07-19 14:37:36,626 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 14:37:36,647 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 14:37:36,676 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 14:37:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:37:37,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 16 [2022-07-19 14:37:37,625 INFO L390 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 5 treesize of output 3 [2022-07-19 14:37:37,628 INFO L390 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 5 treesize of output 3 [2022-07-19 14:37:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:37:37,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:37:37,663 INFO L356 Elim1Store]: treesize reduction 28, result has 47.2 percent of original size [2022-07-19 14:37:37,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 202 [2022-07-19 14:37:37,765 INFO L390 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 5 treesize of output 3 [2022-07-19 14:37:37,780 INFO L390 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 5 treesize of output 3 [2022-07-19 14:37:38,179 INFO L390 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 16 treesize of output 8 [2022-07-19 14:37:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:38,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:37:38,457 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:37:38,457 INFO L390 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 746 treesize of output 735 [2022-07-19 14:37:38,469 INFO L390 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 902 treesize of output 870 [2022-07-19 14:37:38,483 INFO L390 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 958 treesize of output 942 [2022-07-19 14:37:38,496 INFO L390 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 942 treesize of output 938 [2022-07-19 14:37:38,508 INFO L390 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 938 treesize of output 930 [2022-07-19 14:37:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:37:38,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:37:38,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:37:38,721 INFO L390 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 30 treesize of output 28 [2022-07-19 14:37:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:37:38,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:37:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:37:38,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485074946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:37:38,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:37:38,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-07-19 14:37:38,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684073626] [2022-07-19 14:37:38,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:37:38,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 14:37:38,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:37:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 14:37:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=948, Unknown=6, NotChecked=0, Total=1056 [2022-07-19 14:37:38,865 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 33 states, 28 states have (on average 2.0) internal successors, (56), 25 states have internal predecessors, (56), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 14:37:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:37:40,400 INFO L93 Difference]: Finished difference Result 235 states and 277 transitions. [2022-07-19 14:37:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 14:37:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.0) internal successors, (56), 25 states have internal predecessors, (56), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2022-07-19 14:37:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:37:40,403 INFO L225 Difference]: With dead ends: 235 [2022-07-19 14:37:40,403 INFO L226 Difference]: Without dead ends: 200 [2022-07-19 14:37:40,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=387, Invalid=2913, Unknown=6, NotChecked=0, Total=3306 [2022-07-19 14:37:40,405 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 280 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 14:37:40,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1327 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1421 Invalid, 0 Unknown, 125 Unchecked, 0.9s Time] [2022-07-19 14:37:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-19 14:37:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 173. [2022-07-19 14:37:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 129 states have (on average 1.186046511627907) internal successors, (153), 135 states have internal predecessors, (153), 25 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (33), 25 states have call predecessors, (33), 25 states have call successors, (33) [2022-07-19 14:37:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 211 transitions. [2022-07-19 14:37:40,424 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 211 transitions. Word has length 31 [2022-07-19 14:37:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:37:40,425 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 211 transitions. [2022-07-19 14:37:40,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.0) internal successors, (56), 25 states have internal predecessors, (56), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 14:37:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 211 transitions. [2022-07-19 14:37:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 14:37:40,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:37:40,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:37:40,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 14:37:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:37:40,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:37:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:37:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash 389627046, now seen corresponding path program 1 times [2022-07-19 14:37:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:37:40,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042407488] [2022-07-19 14:37:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:37:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:37:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 14:37:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:40,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 14:37:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:37:41,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 14:37:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat