/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/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:01:16,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:01:16,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:01:16,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:01:16,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:01:16,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:01:16,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:01:16,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:01:16,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:01:16,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:01:16,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:01:16,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:01:16,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:01:16,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:01:16,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:01:16,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:01:16,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:01:16,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:01:16,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:01:16,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:01:16,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:01:16,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:01:16,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:01:16,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:01:16,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:01:16,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:01:16,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:01:16,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:01:16,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:01:16,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:01:16,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:01:16,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:01:16,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:01:16,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:01:16,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:01:16,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:01:16,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:01:16,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:01:16,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:01:16,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:01:16,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:01:16,850 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 11:01:16,879 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:01:16,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:01:16,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:01:16,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:01:16,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:01:16,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:01:16,881 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:01:16,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:01:16,881 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:01:16,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:01:16,882 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:01:16,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:01:16,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:01:16,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:01:16,883 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:01:16,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:01:16,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:01:16,883 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:01:16,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:01:16,885 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:01:16,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:01:16,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:01:16,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:01:16,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:01:16,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:01:16,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:01:16,886 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:01:16,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:01:16,886 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:01:16,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:01:16,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:01:16,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:01:16,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:01:16,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:01:16,887 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:01:16,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:01:16,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:01:16,888 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:01:16,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:01:16,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:01:16,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:01:16,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:01:17,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:01:17,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:01:17,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:01:17,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:01:17,200 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:01:17,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_05.i [2023-04-01 11:01:18,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:01:18,559 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:01:18,559 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_05.i [2023-04-01 11:01:18,565 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9d4e96b/bdfb29b1868e4a3c82d15f7fef548d04/FLAGa51523a3b [2023-04-01 11:01:18,580 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9d4e96b/bdfb29b1868e4a3c82d15f7fef548d04 [2023-04-01 11:01:18,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:01:18,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:01:18,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:01:18,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:01:18,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:01:18,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be80ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18, skipping insertion in model container [2023-04-01 11:01:18,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:01:18,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:01:18,732 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/eureka_05.i[810,823] [2023-04-01 11:01:18,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:01:18,762 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:01:18,774 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/eureka_05.i[810,823] [2023-04-01 11:01:18,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:01:18,811 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:01:18,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18 WrapperNode [2023-04-01 11:01:18,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:01:18,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:01:18,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:01:18,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:01:18,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:01:18,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:01:18,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:01:18,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:01:18,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (1/1) ... [2023-04-01 11:01:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:01:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:18,888 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 11:01:18,912 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 11:01:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:01:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:01:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:01:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:01:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2023-04-01 11:01:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:01:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:01:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:01:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 11:01:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:01:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:01:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:01:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:01:19,015 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:01:19,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:01:19,202 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:01:19,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:01:19,282 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 11:01:19,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:01:19 BoogieIcfgContainer [2023-04-01 11:01:19,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:01:19,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:01:19,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:01:19,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:01:19,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:01:18" (1/3) ... [2023-04-01 11:01:19,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d466a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:01:19, skipping insertion in model container [2023-04-01 11:01:19,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:18" (2/3) ... [2023-04-01 11:01:19,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d466a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:01:19, skipping insertion in model container [2023-04-01 11:01:19,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:01:19" (3/3) ... [2023-04-01 11:01:19,291 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2023-04-01 11:01:19,307 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:01:19,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:01:19,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:01:19,357 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;@39c5e1e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:01:19,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:01:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 11:01:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 11:01:19,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:19,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:19,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:19,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2140996651, now seen corresponding path program 1 times [2023-04-01 11:01:19,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:19,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58297826] [2023-04-01 11:01:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:19,659 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 11:01:19,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58297826] [2023-04-01 11:01:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58297826] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:01:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:01:19,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:01:19,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251887377] [2023-04-01 11:01:19,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:01:19,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:01:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:01:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:01:19,704 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:19,776 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-04-01 11:01:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:01:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 11:01:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:19,819 INFO L225 Difference]: With dead ends: 43 [2023-04-01 11:01:19,820 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 11:01:19,823 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 11:01:19,827 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:19,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 11:01:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 11:01:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-01 11:01:19,866 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2023-04-01 11:01:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:19,867 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-01 11:01:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-01 11:01:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:01:19,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:19,869 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 11:01:19,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:01:19,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:19,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1670822531, now seen corresponding path program 1 times [2023-04-01 11:01:19,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:19,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754695443] [2023-04-01 11:01:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:19,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:19,982 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 11:01:19,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754695443] [2023-04-01 11:01:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754695443] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226630957] [2023-04-01 11:01:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:19,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:19,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:19,987 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 11:01:19,990 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 11:01:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:20,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:01:20,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:20,117 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 11:01:20,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:20,146 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 11:01:20,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226630957] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:20,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537711965] [2023-04-01 11:01:20,199 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:01:20,199 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:20,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:20,207 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:20,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:20,483 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:21,255 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:21,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:21,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1537711965] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:01:22,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:22,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4, 4] total 14 [2023-04-01 11:01:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262092535] [2023-04-01 11:01:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:01:22,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:01:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:01:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2023-04-01 11:01:22,099 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:24,285 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-04-01 11:01:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:01:24,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 11:01:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:24,286 INFO L225 Difference]: With dead ends: 35 [2023-04-01 11:01:24,286 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 11:01:24,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=110, Invalid=437, Unknown=5, NotChecked=0, Total=552 [2023-04-01 11:01:24,288 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:24,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 116 Invalid, 2 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:01:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 11:01:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-04-01 11:01:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 11:01:24,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2023-04-01 11:01:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:24,311 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 11:01:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 11:01:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 11:01:24,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:24,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:24,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:01:24,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:24,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:24,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1186739137, now seen corresponding path program 1 times [2023-04-01 11:01:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409209308] [2023-04-01 11:01:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:24,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:01:24,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:24,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409209308] [2023-04-01 11:01:24,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409209308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:24,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283336317] [2023-04-01 11:01:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:24,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:24,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:24,627 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 11:01:24,632 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 11:01:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:24,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:01:24,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:01:24,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:01:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283336317] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:24,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003929708] [2023-04-01 11:01:24,779 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:01:24,779 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:24,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:24,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:24,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:24,888 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:25,259 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:25,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:25,310 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:25,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2003929708] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:01:25,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:25,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 15 [2023-04-01 11:01:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330750111] [2023-04-01 11:01:25,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:01:25,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:01:25,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:01:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2023-04-01 11:01:25,924 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:27,602 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-04-01 11:01:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:01:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-04-01 11:01:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:27,604 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:01:27,604 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 11:01:27,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=128, Invalid=517, Unknown=5, NotChecked=0, Total=650 [2023-04-01 11:01:27,605 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:27,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 2 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 11:01:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-04-01 11:01:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-01 11:01:27,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2023-04-01 11:01:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:27,617 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-01 11:01:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-01 11:01:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:01:27,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:27,618 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] [2023-04-01 11:01:27,629 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 11:01:27,824 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,SelfDestructingSolverStorable2 [2023-04-01 11:01:27,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:27,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2008029873, now seen corresponding path program 1 times [2023-04-01 11:01:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:27,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736714261] [2023-04-01 11:01:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:27,882 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 11:01:27,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736714261] [2023-04-01 11:01:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736714261] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:27,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020934173] [2023-04-01 11:01:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:27,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:27,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:27,884 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 11:01:27,909 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 11:01:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:27,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:01:27,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:27,950 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 11:01:27,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:27,965 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 11:01:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020934173] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684036082] [2023-04-01 11:01:27,967 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:01:27,967 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:27,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:27,967 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:27,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:28,049 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:28,529 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 92 for LOIs [2023-04-01 11:01:28,581 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:28,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:28,746 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:29,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '720#(and (= 3 |~#array~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 5 ~n~0) (not (= |#StackHeapBarrier| 0)) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (exists ((|v_old(#valid)_BEFORE_CALL_9| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_9| (Array Int Int)) (|v_main_~#array~1.base_BEFORE_CALL_9| Int) (|v_old(#memory_int)_BEFORE_CALL_9| (Array Int (Array Int Int)))) (and (= (select |v_old(#valid)_BEFORE_CALL_9| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_9| 3) 20) (= 12 (select |v_old(#length)_BEFORE_CALL_9| 2)) (= (select |v_old(#valid)_BEFORE_CALL_9| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 3) 4) 0) (not (= 1 |v_main_~#array~1.base_BEFORE_CALL_9|)) (not (= (select (select |#memory_int| |v_main_~#array~1.base_BEFORE_CALL_9|) 0) 0)) (not (= |#StackHeapBarrier| |v_main_~#array~1.base_BEFORE_CALL_9|)) (= (select |v_old(#valid)_BEFORE_CALL_9| 0) 0) (not (= |v_old(#length)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= 0 |v_main_~#array~1.base_BEFORE_CALL_9|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 3) 12) 0) (not (= |v_old(#valid)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= 3 |v_main_~#array~1.base_BEFORE_CALL_9|)) (not (= |v_old(#valid)_BEFORE_CALL_9| |v_old(#length)_BEFORE_CALL_9|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 3) 16) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 0)) (not (= 2 |v_main_~#array~1.base_BEFORE_CALL_9|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_9| 3) (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (= (select |v_old(#valid)_BEFORE_CALL_9| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 3) 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_9| |v_main_~#array~1.base_BEFORE_CALL_9|) 0) (= (select |v_old(#length)_BEFORE_CALL_9| 1) 2) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 3) 8) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 11:01:29,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:01:29,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:29,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-04-01 11:01:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000037268] [2023-04-01 11:01:29,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:01:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:01:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:01:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=323, Unknown=1, NotChecked=0, Total=380 [2023-04-01 11:01:29,717 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:01:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:29,779 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-04-01 11:01:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:01:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-04-01 11:01:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:29,785 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:01:29,785 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 11:01:29,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=323, Unknown=1, NotChecked=0, Total=380 [2023-04-01 11:01:29,786 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:29,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:01:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 11:01:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-04-01 11:01:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-04-01 11:01:29,802 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2023-04-01 11:01:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:29,803 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-04-01 11:01:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:01:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-04-01 11:01:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 11:01:29,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:29,804 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:29,833 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 11:01:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:30,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:30,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1157170679, now seen corresponding path program 2 times [2023-04-01 11:01:30,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:30,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384294258] [2023-04-01 11:01:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:30,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 11:01:30,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:30,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384294258] [2023-04-01 11:01:30,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384294258] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:30,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158948971] [2023-04-01 11:01:30,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:01:30,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:30,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:30,161 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 11:01:30,186 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 11:01:30,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 11:01:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:01:30,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:01:30,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 11:01:30,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 11:01:30,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158948971] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071215064] [2023-04-01 11:01:30,325 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:01:30,325 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:30,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:30,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:30,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:30,390 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:30,854 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 92 for LOIs [2023-04-01 11:01:30,906 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:31,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:31,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:32,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1003#(and (= 3 |~#array~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 5 ~n~0) (not (= |#StackHeapBarrier| 0)) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_13| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_13| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_13| (Array Int Int)) (|v_main_~#array~1.base_BEFORE_CALL_13| Int)) (and (= (select |v_old(#valid)_BEFORE_CALL_13| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_13| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_13| 1) |v_old(#length)_BEFORE_CALL_13|)) (= 20 (select |v_old(#length)_BEFORE_CALL_13| 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_13| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_13| 3) 12) 0) (not (= |v_old(#valid)_BEFORE_CALL_13| (select |v_old(#memory_int)_BEFORE_CALL_13| 1))) (not (= 2 |v_main_~#array~1.base_BEFORE_CALL_13|)) (not (= 3 |v_main_~#array~1.base_BEFORE_CALL_13|)) (not (= (select (select |#memory_int| |v_main_~#array~1.base_BEFORE_CALL_13|) 0) 0)) (= (select |v_old(#valid)_BEFORE_CALL_13| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_13| 3) 8) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_13| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_13| 3) (select |v_old(#memory_int)_BEFORE_CALL_13| 1))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_13| 3) 4)) (not (= |#StackHeapBarrier| |v_main_~#array~1.base_BEFORE_CALL_13|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_13| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_13| 3) 0) 0) (not (= |v_main_~#array~1.base_BEFORE_CALL_13| 0)) (not (= |v_main_~#array~1.base_BEFORE_CALL_13| 1)) (= (select |v_old(#valid)_BEFORE_CALL_13| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_13| 3) 16) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_13| 2)) (not (= |v_old(#valid)_BEFORE_CALL_13| |v_old(#length)_BEFORE_CALL_13|)) (= (select |v_old(#valid)_BEFORE_CALL_13| |v_main_~#array~1.base_BEFORE_CALL_13|) 0))))' at error location [2023-04-01 11:01:32,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:01:32,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:32,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2023-04-01 11:01:32,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901869871] [2023-04-01 11:01:32,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:01:32,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:01:32,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:32,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:01:32,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=591, Unknown=2, NotChecked=0, Total=702 [2023-04-01 11:01:32,086 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:01:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:32,241 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-04-01 11:01:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:01:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2023-04-01 11:01:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:32,242 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:01:32,243 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:01:32,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=164, Invalid=826, Unknown=2, NotChecked=0, Total=992 [2023-04-01 11:01:32,244 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:32,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:01:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:01:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-04-01 11:01:32,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2023-04-01 11:01:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:32,262 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-04-01 11:01:32,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:01:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-04-01 11:01:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:01:32,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:32,263 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:32,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:01:32,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:32,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:32,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1466356571, now seen corresponding path program 3 times [2023-04-01 11:01:32,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:32,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261857315] [2023-04-01 11:01:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 11:01:32,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:32,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261857315] [2023-04-01 11:01:32,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261857315] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:32,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825978773] [2023-04-01 11:01:32,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:01:32,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:32,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:32,600 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 11:01:32,625 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 11:01:32,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:01:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:01:32,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:01:32,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:01:32,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:01:32,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825978773] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:32,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129170994] [2023-04-01 11:01:32,763 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:01:32,763 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:32,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:32,763 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:32,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:32,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:33,275 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 92 for LOIs [2023-04-01 11:01:33,326 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:33,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:33,465 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:34,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1353#(and (exists ((|v_main_~#array~1.base_BEFORE_CALL_17| Int) (|v_old(#memory_int)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_17| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_17| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_17| 3) 16) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_17| 3) 8) 0) (= (select |v_old(#length)_BEFORE_CALL_17| 2) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_17| 1) (select |v_old(#memory_int)_BEFORE_CALL_17| 3))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_17| 3) 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_17| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_17| 3) 4) 0) (not (= (select (select |#memory_int| |v_main_~#array~1.base_BEFORE_CALL_17|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_17| 3) 12) 0) (not (= |#StackHeapBarrier| |v_main_~#array~1.base_BEFORE_CALL_17|)) (not (= |v_old(#valid)_BEFORE_CALL_17| |v_old(#length)_BEFORE_CALL_17|)) (= (select |v_old(#valid)_BEFORE_CALL_17| |v_main_~#array~1.base_BEFORE_CALL_17|) 0) (not (= |v_main_~#array~1.base_BEFORE_CALL_17| 0)) (not (= |v_main_~#array~1.base_BEFORE_CALL_17| 1)) (= (select |v_old(#length)_BEFORE_CALL_17| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_17| 0) 0) (= (select |v_old(#length)_BEFORE_CALL_17| 3) 20) (not (= 2 |v_main_~#array~1.base_BEFORE_CALL_17|)) (not (= |v_old(#valid)_BEFORE_CALL_17| (select |v_old(#memory_int)_BEFORE_CALL_17| 1))) (not (= 3 |v_main_~#array~1.base_BEFORE_CALL_17|)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)) (= (select |v_old(#valid)_BEFORE_CALL_17| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_17| 1) |v_old(#length)_BEFORE_CALL_17|)) (= (select |v_old(#valid)_BEFORE_CALL_17| 3) 1))) (= 3 |~#array~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 5 ~n~0) (not (= |#StackHeapBarrier| 0)) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:01:34,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:01:34,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:34,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-04-01 11:01:34,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345661326] [2023-04-01 11:01:34,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:01:34,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:01:34,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:34,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:01:34,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=619, Unknown=1, NotChecked=0, Total=702 [2023-04-01 11:01:34,497 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 11:01:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:34,804 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2023-04-01 11:01:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:01:34,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-01 11:01:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:34,806 INFO L225 Difference]: With dead ends: 64 [2023-04-01 11:01:34,806 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 11:01:34,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=205, Invalid=1200, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 11:01:34,809 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:34,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 78 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 11:01:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-04-01 11:01:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-04-01 11:01:34,833 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 30 [2023-04-01 11:01:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:34,833 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-04-01 11:01:34,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 11:01:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-04-01 11:01:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 11:01:34,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:34,834 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:34,845 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 11:01:35,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:35,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:35,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1130504547, now seen corresponding path program 4 times [2023-04-01 11:01:35,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:35,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978823117] [2023-04-01 11:01:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 11:01:35,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978823117] [2023-04-01 11:01:35,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978823117] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519843834] [2023-04-01 11:01:35,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:01:35,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:35,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:35,185 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 11:01:35,187 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 11:01:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:35,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:01:35,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 11:01:35,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 11:01:35,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519843834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769016691] [2023-04-01 11:01:35,361 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:01:35,361 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:35,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:35,361 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:35,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:35,423 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:35,891 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 92 for LOIs [2023-04-01 11:01:35,943 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:36,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:36,085 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:37,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1788#(and (= 3 |~#array~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 5 ~n~0) (not (= |#StackHeapBarrier| 0)) (= |~#array~0.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_21| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_21| (Array Int Int)) (|v_main_~#array~1.base_BEFORE_CALL_21| Int) (|v_old(#length)_BEFORE_CALL_21| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_21| |v_main_~#array~1.base_BEFORE_CALL_21|) 0) (not (= |v_main_~#array~1.base_BEFORE_CALL_21| 1)) (= (select |v_old(#valid)_BEFORE_CALL_21| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_21| 1) (select |v_old(#memory_int)_BEFORE_CALL_21| 3))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 1) 0) 48) (not (= 3 |v_main_~#array~1.base_BEFORE_CALL_21|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 3) 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 3) 12) 0) (= (select |v_old(#valid)_BEFORE_CALL_21| 2) 1) (not (= |v_main_~#array~1.base_BEFORE_CALL_21| 0)) (not (= |#StackHeapBarrier| |v_main_~#array~1.base_BEFORE_CALL_21|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 3) 4) 0) (= (select |v_old(#length)_BEFORE_CALL_21| 2) 12) (= 1 (select |v_old(#valid)_BEFORE_CALL_21| 1)) (not (= |v_old(#valid)_BEFORE_CALL_21| |v_old(#length)_BEFORE_CALL_21|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 3) 8) 0) (not (= 2 |v_main_~#array~1.base_BEFORE_CALL_21|)) (= (select |v_old(#length)_BEFORE_CALL_21| 3) 20) (= (select |v_old(#valid)_BEFORE_CALL_21| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_21| 3) 16) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_21| 1)) (not (= (select (select |#memory_int| |v_main_~#array~1.base_BEFORE_CALL_21|) 0) 0)) (not (= |v_old(#length)_BEFORE_CALL_21| (select |v_old(#memory_int)_BEFORE_CALL_21| 1))) (not (= |v_old(#valid)_BEFORE_CALL_21| (select |v_old(#memory_int)_BEFORE_CALL_21| 1))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:01:37,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:01:37,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:37,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-04-01 11:01:37,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170437854] [2023-04-01 11:01:37,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:01:37,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:01:37,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:01:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=613, Unknown=1, NotChecked=0, Total=702 [2023-04-01 11:01:37,181 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:01:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:37,451 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2023-04-01 11:01:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:01:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2023-04-01 11:01:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:37,453 INFO L225 Difference]: With dead ends: 88 [2023-04-01 11:01:37,453 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 11:01:37,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=1230, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 11:01:37,455 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 108 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 11:01:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-04-01 11:01:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-04-01 11:01:37,481 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 34 [2023-04-01 11:01:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:37,481 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-04-01 11:01:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:01:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-04-01 11:01:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 11:01:37,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:37,484 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:37,490 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 11:01:37,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:37,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:37,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1324650933, now seen corresponding path program 5 times [2023-04-01 11:01:37,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:37,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32597278] [2023-04-01 11:01:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 11:01:37,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32597278] [2023-04-01 11:01:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32597278] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488044041] [2023-04-01 11:01:37,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:01:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:37,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:37,825 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 11:01:37,828 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 11:01:37,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 11:01:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:01:37,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:01:37,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 11:01:38,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 11:01:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488044041] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984179067] [2023-04-01 11:01:38,244 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:01:38,245 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:38,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:38,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:38,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:38,319 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 11:01:38,711 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 92 for LOIs [2023-04-01 11:01:38,758 INFO L197 IcfgInterpreter]: Interpreting procedure SelectionSort with input of size 84 for LOIs [2023-04-01 11:01:38,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 11:01:38,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:39,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2290#(and (= 3 |~#array~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 5 ~n~0) (not (= |#StackHeapBarrier| 0)) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (exists ((|v_old(#length)_BEFORE_CALL_25| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_25| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_25| (Array Int Int)) (|v_main_~#array~1.base_BEFORE_CALL_25| Int)) (and (not (= (select (select |#memory_int| |v_main_~#array~1.base_BEFORE_CALL_25|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 3) 12) 0) (not (= |v_main_~#array~1.base_BEFORE_CALL_25| 1)) (not (= |v_old(#valid)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (not (= |v_old(#valid)_BEFORE_CALL_25| |v_old(#length)_BEFORE_CALL_25|)) (not (= |#StackHeapBarrier| |v_main_~#array~1.base_BEFORE_CALL_25|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_25| 3) (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (not (= |v_main_~#array~1.base_BEFORE_CALL_25| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 3) 16) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_25| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_25| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_25| |v_main_~#array~1.base_BEFORE_CALL_25|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 3) 4) 0) (not (= 2 |v_main_~#array~1.base_BEFORE_CALL_25|)) (= (select |v_old(#length)_BEFORE_CALL_25| 3) 20) (= (select |v_old(#valid)_BEFORE_CALL_25| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_25| 0) 0) (not (= 3 |v_main_~#array~1.base_BEFORE_CALL_25|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 3) 8) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 3) 0) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_25| 1)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_25| 1) 0)) (not (= |v_old(#length)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (= (select |v_old(#length)_BEFORE_CALL_25| 2) 12))) (= |#NULL.base| 0))' at error location [2023-04-01 11:01:39,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:01:39,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:39,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2023-04-01 11:01:39,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76409767] [2023-04-01 11:01:39,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:01:39,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 11:01:39,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 11:01:39,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=909, Unknown=1, NotChecked=0, Total=1056 [2023-04-01 11:01:39,959 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:01:40,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:40,243 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2023-04-01 11:01:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 11:01:40,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-04-01 11:01:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:40,245 INFO L225 Difference]: With dead ends: 76 [2023-04-01 11:01:40,245 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 11:01:40,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=336, Invalid=1555, Unknown=1, NotChecked=0, Total=1892 [2023-04-01 11:01:40,247 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:40,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 11:01:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-04-01 11:01:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-04-01 11:01:40,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 36 [2023-04-01 11:01:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:40,282 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-04-01 11:01:40,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:01:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-04-01 11:01:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 11:01:40,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:40,288 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:40,329 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 11:01:40,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:40,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:40,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash -746915969, now seen corresponding path program 6 times [2023-04-01 11:01:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860585398] [2023-04-01 11:01:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-01 11:01:41,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:41,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860585398] [2023-04-01 11:01:41,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860585398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:41,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154612975] [2023-04-01 11:01:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:01:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:41,411 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 11:01:41,417 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 11:01:41,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:01:41,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:01:41,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2023-04-01 11:01:41,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:41,772 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 15 treesize of output 11 [2023-04-01 11:01:41,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-04-01 11:01:41,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:41,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2023-04-01 11:01:41,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:41,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 62 [2023-04-01 11:01:41,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:41,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 74 [2023-04-01 11:02:05,417 WARN L223 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 244 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:02:19,055 WARN L223 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 253 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)