/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:03:01,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:03:01,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:03:01,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:03:01,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:03:01,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:03:01,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:03:01,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:03:01,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:03:01,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:03:01,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:03:01,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:03:01,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:03:01,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:03:01,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:03:01,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:03:01,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:03:01,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:03:01,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:03:01,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:03:01,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:03:01,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:03:01,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:03:01,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:03:01,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:03:01,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:03:01,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:03:01,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:03:01,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:03:01,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:03:01,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:03:01,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:03:01,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:03:01,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:03:01,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:03:01,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:03:01,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:03:01,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:03:01,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:03:01,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:03:01,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:03:01,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:03:01,889 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:03:01,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:03:01,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:03:01,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:03:01,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:03:01,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:03:01,891 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:03:01,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:03:01,891 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:03:01,892 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:03:01,892 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:03:01,892 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:03:01,892 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:03:01,892 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:03:01,892 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:03:01,893 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:03:01,893 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:03:01,893 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:03:01,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:03:01,893 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:03:01,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:03:01,895 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:03:01,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:03:01,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:03:01,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:03:01,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:03:01,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:03:01,895 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:03:01,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:03:01,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:03:01,896 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:03:01,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:03:01,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:03:01,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:03:01,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:03:02,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:03:02,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:03:02,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:03:02,157 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:03:02,157 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:03:02,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-1.i [2023-04-01 11:03:03,353 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:03:03,540 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:03:03,541 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2023-04-01 11:03:03,545 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11fef77be/ac493219f5384850b86309b50af9eb03/FLAGd2b114624 [2023-04-01 11:03:03,557 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11fef77be/ac493219f5384850b86309b50af9eb03 [2023-04-01 11:03:03,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:03:03,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:03:03,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:03:03,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:03:03,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:03:03,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@582111bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03, skipping insertion in model container [2023-04-01 11:03:03,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:03:03,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:03:03,706 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i[895,908] [2023-04-01 11:03:03,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:03:03,732 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:03:03,742 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i[895,908] [2023-04-01 11:03:03,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:03:03,765 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:03:03,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03 WrapperNode [2023-04-01 11:03:03,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:03:03,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:03:03,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:03:03,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:03:03,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,795 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:03:03,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:03:03,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:03:03,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:03:03,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (1/1) ... [2023-04-01 11:03:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:03:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:03,840 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) [2023-04-01 11:03:03,842 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 [2023-04-01 11:03:03,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:03:03,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:03:03,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:03:03,879 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:03:03,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:03:03,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:03:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:03:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:03:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:03:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:03:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:03:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:03:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:03:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:03:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 11:03:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:03:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 11:03:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:03:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:03:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:03:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:03:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:03:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:03:03,950 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:03:03,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:03:04,180 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:03:04,303 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:03:04,303 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 11:03:04,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:03:04 BoogieIcfgContainer [2023-04-01 11:03:04,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:03:04,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:03:04,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:03:04,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:03:04,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:03:03" (1/3) ... [2023-04-01 11:03:04,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6c5c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:03:04, skipping insertion in model container [2023-04-01 11:03:04,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:03" (2/3) ... [2023-04-01 11:03:04,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6c5c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:03:04, skipping insertion in model container [2023-04-01 11:03:04,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:03:04" (3/3) ... [2023-04-01 11:03:04,319 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2023-04-01 11:03:04,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:03:04,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:03:04,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:03:04,406 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1adc9329, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:03:04,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:03:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:03:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:03:04,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:04,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:04,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:04,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1965531224, now seen corresponding path program 1 times [2023-04-01 11:03:04,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230466236] [2023-04-01 11:03:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:04,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:04,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230466236] [2023-04-01 11:03:04,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230466236] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:04,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:03:04,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:03:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145090896] [2023-04-01 11:03:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:03:04,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:03:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:03:04,687 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:04,745 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-04-01 11:03:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:03:04,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 11:03:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:04,755 INFO L225 Difference]: With dead ends: 45 [2023-04-01 11:03:04,755 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 11:03:04,758 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 [2023-04-01 11:03:04,760 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:04,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 11:03:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 11:03:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-04-01 11:03:04,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2023-04-01 11:03:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:04,793 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-04-01 11:03:04,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-04-01 11:03:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:03:04,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:04,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:04,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:03:04,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:04,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash 939916392, now seen corresponding path program 1 times [2023-04-01 11:03:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:04,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848079649] [2023-04-01 11:03:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:04,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:04,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:04,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848079649] [2023-04-01 11:03:04,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848079649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:04,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:03:04,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:03:04,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396371935] [2023-04-01 11:03:04,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:03:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:03:05,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:03:05,000 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:05,043 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-04-01 11:03:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:03:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 11:03:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:05,046 INFO L225 Difference]: With dead ends: 41 [2023-04-01 11:03:05,047 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 11:03:05,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:03:05,051 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:05,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 11:03:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-04-01 11:03:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-04-01 11:03:05,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 17 [2023-04-01 11:03:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:05,060 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-04-01 11:03:05,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-04-01 11:03:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:03:05,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:05,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:05,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:03:05,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:05,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1055803680, now seen corresponding path program 1 times [2023-04-01 11:03:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:05,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622415562] [2023-04-01 11:03:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:05,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622415562] [2023-04-01 11:03:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622415562] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482029703] [2023-04-01 11:03:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:05,221 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) [2023-04-01 11:03:05,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:03:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:05,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:03:05,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:03:05,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:03:05,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482029703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:05,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:03:05,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2023-04-01 11:03:05,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550317738] [2023-04-01 11:03:05,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:05,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:03:05,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:03:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:03:05,355 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:05,408 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2023-04-01 11:03:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:03:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 11:03:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:05,409 INFO L225 Difference]: With dead ends: 35 [2023-04-01 11:03:05,409 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 11:03:05,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:03:05,411 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:05,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 11:03:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-04-01 11:03:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-04-01 11:03:05,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2023-04-01 11:03:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:05,416 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-04-01 11:03:05,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-04-01 11:03:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:03:05,417 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:05,417 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] [2023-04-01 11:03:05,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:05,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:05,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:05,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -159857059, now seen corresponding path program 1 times [2023-04-01 11:03:05,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:05,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820665551] [2023-04-01 11:03:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:05,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820665551] [2023-04-01 11:03:05,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820665551] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:05,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603454439] [2023-04-01 11:03:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:05,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:05,742 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) [2023-04-01 11:03:05,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:03:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:05,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:03:05,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:05,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:03:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603454439] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:05,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:03:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-01 11:03:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109787438] [2023-04-01 11:03:05,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:05,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:03:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:05,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:03:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:03:05,864 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:05,898 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2023-04-01 11:03:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:03:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 11:03:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:05,900 INFO L225 Difference]: With dead ends: 56 [2023-04-01 11:03:05,900 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 11:03:05,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:03:05,901 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:05,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 11:03:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2023-04-01 11:03:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-04-01 11:03:05,907 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2023-04-01 11:03:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:05,907 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-04-01 11:03:05,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-04-01 11:03:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 11:03:05,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:05,908 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:05,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:06,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 11:03:06,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:06,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:06,115 INFO L85 PathProgramCache]: Analyzing trace with hash 962914754, now seen corresponding path program 1 times [2023-04-01 11:03:06,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:06,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977735496] [2023-04-01 11:03:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:06,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 11:03:06,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977735496] [2023-04-01 11:03:06,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977735496] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141939518] [2023-04-01 11:03:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:06,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:06,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:06,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:03:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:06,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 11:03:06,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:06,348 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 11:03:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:03:06,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141939518] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:06,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:03:06,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 8] total 12 [2023-04-01 11:03:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720458823] [2023-04-01 11:03:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:03:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:03:06,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:03:06,589 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:06,721 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-04-01 11:03:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:03:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 11:03:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:06,724 INFO L225 Difference]: With dead ends: 43 [2023-04-01 11:03:06,724 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:03:06,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:03:06,727 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:06,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:03:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:03:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 11:03:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-04-01 11:03:06,736 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 22 [2023-04-01 11:03:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:06,736 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-04-01 11:03:06,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-04-01 11:03:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 11:03:06,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:06,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:06,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:06,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:06,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:06,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:06,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1830215480, now seen corresponding path program 1 times [2023-04-01 11:03:06,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:06,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217671547] [2023-04-01 11:03:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:03:07,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:07,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217671547] [2023-04-01 11:03:07,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217671547] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:07,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832241268] [2023-04-01 11:03:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:07,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:07,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:07,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:03:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:07,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 11:03:07,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:07,118 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 11:03:07,217 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 11:03:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:07,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 11:03:07,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832241268] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:07,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:03:07,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2023-04-01 11:03:07,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804252320] [2023-04-01 11:03:07,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:07,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:03:07,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:03:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:03:07,364 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:07,506 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2023-04-01 11:03:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:03:07,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-01 11:03:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:07,507 INFO L225 Difference]: With dead ends: 42 [2023-04-01 11:03:07,507 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 11:03:07,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-04-01 11:03:07,511 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:07,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:03:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 11:03:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 11:03:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-01 11:03:07,524 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 23 [2023-04-01 11:03:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:07,524 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-01 11:03:07,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-01 11:03:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 11:03:07,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:07,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:07,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 11:03:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:07,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:07,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1769345977, now seen corresponding path program 1 times [2023-04-01 11:03:07,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:07,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279200269] [2023-04-01 11:03:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 11:03:07,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279200269] [2023-04-01 11:03:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279200269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:07,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944652738] [2023-04-01 11:03:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:07,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:07,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:07,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:07,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:03:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:07,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 11:03:07,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 11:03:07,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:03:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944652738] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710600990] [2023-04-01 11:03:08,002 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:03:08,003 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:08,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:08,010 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:08,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:08,088 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:10,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2023-04-01 11:03:10,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:10,468 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:13,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1710600990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:13,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:13,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 5] total 22 [2023-04-01 11:03:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907238021] [2023-04-01 11:03:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:03:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:03:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:03:13,013 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:15,581 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-04-01 11:03:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:03:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 11:03:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:15,583 INFO L225 Difference]: With dead ends: 52 [2023-04-01 11:03:15,583 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 11:03:15,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:03:15,584 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:15,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:03:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 11:03:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2023-04-01 11:03:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-04-01 11:03:15,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 24 [2023-04-01 11:03:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:15,599 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-04-01 11:03:15,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-04-01 11:03:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 11:03:15,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:15,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:15,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:15,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:15,807 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:15,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash 414209414, now seen corresponding path program 1 times [2023-04-01 11:03:15,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:15,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258557637] [2023-04-01 11:03:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:03:15,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258557637] [2023-04-01 11:03:15,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258557637] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296408980] [2023-04-01 11:03:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:15,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:15,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:15,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:03:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:16,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 11:03:16,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:03:16,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 11:03:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296408980] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:16,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:03:16,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2023-04-01 11:03:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257921495] [2023-04-01 11:03:16,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:16,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:03:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:03:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:03:16,028 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:16,066 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-04-01 11:03:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:03:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 11:03:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:16,067 INFO L225 Difference]: With dead ends: 46 [2023-04-01 11:03:16,067 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 11:03:16,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:03:16,069 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:16,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 11:03:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-01 11:03:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-04-01 11:03:16,092 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 26 [2023-04-01 11:03:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:16,094 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-04-01 11:03:16,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-04-01 11:03:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 11:03:16,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:16,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:16,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:16,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:16,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1821497830, now seen corresponding path program 1 times [2023-04-01 11:03:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:16,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829442189] [2023-04-01 11:03:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 11:03:16,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:16,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829442189] [2023-04-01 11:03:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829442189] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035524512] [2023-04-01 11:03:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:16,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:16,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:03:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:16,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 11:03:16,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:16,517 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 11:03:16,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:03:16,725 INFO L350 Elim1Store]: Elim1 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 65 treesize of output 41 [2023-04-01 11:03:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:16,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 11:03:18,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035524512] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:18,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941323209] [2023-04-01 11:03:18,249 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:03:18,249 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:18,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:18,249 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:18,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:18,276 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:30,207 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 158 for LOIs [2023-04-01 11:03:30,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:30,315 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:33,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1919#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#vogal_array~0.base_BEFORE_CALL_2| Int) (|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int))) (v_main_~n_caracter~0_BEFORE_CALL_2 Int) (|v_main_~#input_string~0.base_BEFORE_CALL_2| Int) (v_main_~i~0_BEFORE_CALL_2 Int)) (and (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 3) 69) (= (select |v_old(#valid)_BEFORE_CALL_2| |v_main_~#input_string~0.base_BEFORE_CALL_2|) 0) (not (= |v_main_~#vogal_array~0.base_BEFORE_CALL_2| 0)) (not (= v_main_~n_caracter~0_BEFORE_CALL_2 5)) (or (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_2|) (+ (mod v_main_~n_caracter~0_BEFORE_CALL_2 4294967296) (- 4294967296))) 0) (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_2|) (mod v_main_~n_caracter~0_BEFORE_CALL_2 4294967296)) 0)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 0) 97) (= 117 (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 8)) (not (= v_main_~n_caracter~0_BEFORE_CALL_2 9)) (not (= |v_main_~#vogal_array~0.base_BEFORE_CALL_2| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (not (= v_main_~n_caracter~0_BEFORE_CALL_2 7)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 7) 79) (not (= |v_main_~#input_string~0.base_BEFORE_CALL_2| 1)) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (not (= |v_main_~#input_string~0.base_BEFORE_CALL_2| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 5) 73) (not (= (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= v_main_~n_caracter~0_BEFORE_CALL_2 8)) (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_2|) 4) 0) (not (= 2 |v_main_~#input_string~0.base_BEFORE_CALL_2|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 2)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 6)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 4) 105) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= v_main_~n_caracter~0_BEFORE_CALL_2 10)) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (not (= |#StackHeapBarrier| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_2|))) (not (= |v_main_~#input_string~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 1) 65) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|))) (not (= v_main_~n_caracter~0_BEFORE_CALL_2 6)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 9) 85) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| |v_main_~#vogal_array~0.base_BEFORE_CALL_2|) 10) 0) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_2 4294967296) 2147483647) (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_2|) (mod v_main_~i~0_BEFORE_CALL_2 4294967296)) 0)) (and (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_2|) (+ (mod v_main_~i~0_BEFORE_CALL_2 4294967296) (- 4294967296))) 0) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_2 4294967296)))) (= (select |v_old(#length)_BEFORE_CALL_2| 2) 10) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:33,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:33,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12, 10] total 22 [2023-04-01 11:03:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055811111] [2023-04-01 11:03:33,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 11:03:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 11:03:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1341, Unknown=2, NotChecked=0, Total=1482 [2023-04-01 11:03:33,649 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:36,007 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2023-04-01 11:03:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 11:03:36,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 11:03:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:36,008 INFO L225 Difference]: With dead ends: 86 [2023-04-01 11:03:36,008 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 11:03:36,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=250, Invalid=2198, Unknown=2, NotChecked=0, Total=2450 [2023-04-01 11:03:36,011 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 112 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:36,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 172 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:03:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 11:03:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2023-04-01 11:03:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-04-01 11:03:36,030 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 27 [2023-04-01 11:03:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:36,031 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-04-01 11:03:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-04-01 11:03:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 11:03:36,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:36,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:36,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:36,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:36,237 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:36,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash 685904697, now seen corresponding path program 2 times [2023-04-01 11:03:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:36,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060259975] [2023-04-01 11:03:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:03:36,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:36,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060259975] [2023-04-01 11:03:36,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060259975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:36,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722083834] [2023-04-01 11:03:36,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:03:36,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:36,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:36,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:03:36,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 11:03:36,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:03:36,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:03:36,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:03:36,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:03:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722083834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430519187] [2023-04-01 11:03:36,462 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:03:36,462 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:36,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:36,462 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:36,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:36,484 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:45,986 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 158 for LOIs [2023-04-01 11:03:46,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:46,066 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:48,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2347#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_main_~#vogal_array~0.base_BEFORE_CALL_3| Int) (|v_main_~#input_string~0.base_BEFORE_CALL_3| Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (v_main_~n_caracter~0_BEFORE_CALL_3 Int) (v_main_~i~0_BEFORE_CALL_3 Int)) (and (= (select |v_old(#length)_BEFORE_CALL_3| 2) 10) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 6)) (= 69 (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 3)) (= 97 (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#input_string~0.base_BEFORE_CALL_3|) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) |v_old(#length)_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (not (= |#StackHeapBarrier| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|)) (= 85 (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 9)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (or (and (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_3|) (mod v_main_~i~0_BEFORE_CALL_3 4294967296)) 0) (<= (mod v_main_~i~0_BEFORE_CALL_3 4294967296) 2147483647)) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_3 4294967296)) (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_3|) (+ (mod v_main_~i~0_BEFORE_CALL_3 4294967296) (- 4294967296))) 0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 10) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (not (= |v_main_~#input_string~0.base_BEFORE_CALL_3| 1)) (not (= v_main_~n_caracter~0_BEFORE_CALL_3 10)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_3|))) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= 2 |v_main_~#input_string~0.base_BEFORE_CALL_3|)) (not (= |v_main_~#input_string~0.base_BEFORE_CALL_3| 0)) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 2)) (not (= v_main_~n_caracter~0_BEFORE_CALL_3 5)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 5) 73) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|))) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= v_main_~n_caracter~0_BEFORE_CALL_3 8)) (not (= |v_main_~#vogal_array~0.base_BEFORE_CALL_3| 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 8) 117) (not (= |v_main_~#vogal_array~0.base_BEFORE_CALL_3| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 7) 79) (not (= v_main_~n_caracter~0_BEFORE_CALL_3 7)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 4) 105) (= 65 (select (select |v_old(#memory_int)_BEFORE_CALL_3| |v_main_~#vogal_array~0.base_BEFORE_CALL_3|) 1)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= v_main_~n_caracter~0_BEFORE_CALL_3 9)) (not (= v_main_~n_caracter~0_BEFORE_CALL_3 6)) (or (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_3|) (mod v_main_~n_caracter~0_BEFORE_CALL_3 4294967296)) 0) (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_3|) (+ (mod v_main_~n_caracter~0_BEFORE_CALL_3 4294967296) (- 4294967296))) 0)) (not (= |v_main_~#input_string~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (= (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_3|) 4) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:48,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:48,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:48,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 11:03:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497035753] [2023-04-01 11:03:48,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:03:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:03:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=563, Unknown=6, NotChecked=0, Total=650 [2023-04-01 11:03:48,853 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:49,004 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2023-04-01 11:03:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:03:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-01 11:03:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:49,005 INFO L225 Difference]: With dead ends: 104 [2023-04-01 11:03:49,005 INFO L226 Difference]: Without dead ends: 76 [2023-04-01 11:03:49,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=89, Invalid=607, Unknown=6, NotChecked=0, Total=702 [2023-04-01 11:03:49,006 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:49,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 85 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:03:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-01 11:03:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 39. [2023-04-01 11:03:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-04-01 11:03:49,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2023-04-01 11:03:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:49,028 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-04-01 11:03:49,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-04-01 11:03:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:03:49,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:49,029 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:49,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:49,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 11:03:49,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:49,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 582150833, now seen corresponding path program 3 times [2023-04-01 11:03:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794381175] [2023-04-01 11:03:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 11:03:49,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794381175] [2023-04-01 11:03:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794381175] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123283501] [2023-04-01 11:03:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:03:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:49,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:49,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:03:49,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:03:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:03:49,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 11:03:49,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 11:03:49,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 11:03:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123283501] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:49,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068879249] [2023-04-01 11:03:49,470 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:03:49,470 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:49,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:49,470 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:49,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:49,488 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:58,121 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 158 for LOIs [2023-04-01 11:03:58,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:58,220 INFO L180 IcfgInterpreter]: Interpretation finished