./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/linear_search.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/linear_search.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5daf86ff8189a9471a20a947a9c78ff63bc56ed2dde2c379166a5ef7ff47fae4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:56:03,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:56:03,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:56:03,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:56:03,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:56:03,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:56:03,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:56:03,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:56:03,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:56:03,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:56:03,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:56:03,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:56:03,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:56:03,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:56:03,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:56:03,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:56:03,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:56:03,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:56:03,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:56:03,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:56:03,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:56:03,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:56:03,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:56:03,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:56:03,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:56:03,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:56:03,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:56:03,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:56:03,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:56:03,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:56:03,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:56:03,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:56:03,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:56:03,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:56:03,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:56:03,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:56:03,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:56:03,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:56:03,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:56:03,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:56:03,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:56:03,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:56:03,826 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:56:03,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:56:03,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:56:03,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:56:03,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:56:03,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:56:03,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:56:03,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:56:03,828 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:56:03,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:56:03,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:56:03,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:56:03,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:56:03,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:56:03,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:56:03,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:56:03,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:56:03,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:56:03,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:56:03,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:56:03,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:56:03,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:56:03,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:56:03,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:56:03,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:56:03,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:56:03,833 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:56:03,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:56:03,833 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:56:03,833 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5daf86ff8189a9471a20a947a9c78ff63bc56ed2dde2c379166a5ef7ff47fae4 [2023-02-15 10:56:04,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:56:04,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:56:04,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:56:04,034 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:56:04,034 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:56:04,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_search.c [2023-02-15 10:56:05,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:56:05,173 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:56:05,173 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_search.c [2023-02-15 10:56:05,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dd64b697/e6ed3e780d764ffca2040c026319625d/FLAG39176c9ef [2023-02-15 10:56:05,188 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dd64b697/e6ed3e780d764ffca2040c026319625d [2023-02-15 10:56:05,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:56:05,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:56:05,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:56:05,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:56:05,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:56:05,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546a848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05, skipping insertion in model container [2023-02-15 10:56:05,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:56:05,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:56:05,318 WARN L237 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/linear_search.c[383,396] [2023-02-15 10:56:05,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:56:05,348 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:56:05,357 WARN L237 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/linear_search.c[383,396] [2023-02-15 10:56:05,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:56:05,375 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:56:05,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05 WrapperNode [2023-02-15 10:56:05,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:56:05,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:56:05,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:56:05,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:56:05,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,408 INFO L138 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2023-02-15 10:56:05,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:56:05,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:56:05,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:56:05,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:56:05,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,438 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:56:05,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:56:05,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:56:05,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:56:05,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (1/1) ... [2023-02-15 10:56:05,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:56:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:56:05,473 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) [2023-02-15 10:56:05,490 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 [2023-02-15 10:56:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:56:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:56:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:56:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:56:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:56:05,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:56:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:56:05,564 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:56:05,565 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:56:05,749 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:56:05,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:56:05,752 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 10:56:05,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:56:05 BoogieIcfgContainer [2023-02-15 10:56:05,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:56:05,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:56:05,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:56:05,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:56:05,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:56:05" (1/3) ... [2023-02-15 10:56:05,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e3206e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:56:05, skipping insertion in model container [2023-02-15 10:56:05,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:56:05" (2/3) ... [2023-02-15 10:56:05,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e3206e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:56:05, skipping insertion in model container [2023-02-15 10:56:05,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:56:05" (3/3) ... [2023-02-15 10:56:05,771 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search.c [2023-02-15 10:56:05,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:56:05,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:56:05,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:56:05,849 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1af81736, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:56:05,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:56:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 10:56:05,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:05,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:05,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash -633194304, now seen corresponding path program 1 times [2023-02-15 10:56:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:05,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838069031] [2023-02-15 10:56:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:06,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838069031] [2023-02-15 10:56:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838069031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:56:06,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:56:06,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:56:06,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011084264] [2023-02-15 10:56:06,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:56:06,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:56:06,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:56:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:56:06,077 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:06,087 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-02-15 10:56:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:56:06,088 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 10:56:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:06,092 INFO L225 Difference]: With dead ends: 26 [2023-02-15 10:56:06,092 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 10:56:06,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:56:06,096 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:06,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 10:56:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 10:56:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-02-15 10:56:06,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2023-02-15 10:56:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:06,114 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-02-15 10:56:06,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-02-15 10:56:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:56:06,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:06,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:06,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:56:06,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1170769041, now seen corresponding path program 1 times [2023-02-15 10:56:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:06,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69945324] [2023-02-15 10:56:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:06,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69945324] [2023-02-15 10:56:06,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69945324] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:56:06,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:56:06,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:56:06,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631754097] [2023-02-15 10:56:06,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:56:06,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:56:06,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:56:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:56:06,254 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:06,272 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-15 10:56:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:56:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:56:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:06,273 INFO L225 Difference]: With dead ends: 17 [2023-02-15 10:56:06,273 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 10:56:06,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:56:06,275 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:06,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 10:56:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 10:56:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-15 10:56:06,277 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2023-02-15 10:56:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:06,278 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-15 10:56:06,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-15 10:56:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:56:06,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:06,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:56:06,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:06,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1170828623, now seen corresponding path program 1 times [2023-02-15 10:56:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:06,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419441487] [2023-02-15 10:56:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:06,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419441487] [2023-02-15 10:56:06,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419441487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:56:06,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:56:06,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:56:06,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482647015] [2023-02-15 10:56:06,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:56:06,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:56:06,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:06,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:56:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:56:06,403 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:06,431 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-02-15 10:56:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:56:06,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:56:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:06,432 INFO L225 Difference]: With dead ends: 21 [2023-02-15 10:56:06,432 INFO L226 Difference]: Without dead ends: 16 [2023-02-15 10:56:06,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:56:06,433 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:06,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-15 10:56:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-15 10:56:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-15 10:56:06,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2023-02-15 10:56:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:06,441 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-15 10:56:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-15 10:56:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 10:56:06,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:06,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 10:56:06,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 794559399, now seen corresponding path program 1 times [2023-02-15 10:56:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:06,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389313633] [2023-02-15 10:56:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:06,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:06,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:06,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389313633] [2023-02-15 10:56:06,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389313633] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:56:06,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:56:06,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:56:06,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861649883] [2023-02-15 10:56:06,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:56:06,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:56:06,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:06,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:56:06,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:56:06,498 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:06,511 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-02-15 10:56:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:56:06,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 10:56:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:06,512 INFO L225 Difference]: With dead ends: 27 [2023-02-15 10:56:06,512 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 10:56:06,513 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 [2023-02-15 10:56:06,518 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:06,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 10:56:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 10:56:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-15 10:56:06,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2023-02-15 10:56:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:06,524 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-15 10:56:06,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-15 10:56:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 10:56:06,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:06,526 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:06,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 10:56:06,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1187586409, now seen corresponding path program 1 times [2023-02-15 10:56:06,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:06,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471224593] [2023-02-15 10:56:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:06,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:06,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471224593] [2023-02-15 10:56:06,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471224593] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:56:06,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:56:06,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:56:06,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692666995] [2023-02-15 10:56:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:56:06,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:56:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:56:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:56:06,658 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:06,684 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-02-15 10:56:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:56:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 10:56:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:06,685 INFO L225 Difference]: With dead ends: 37 [2023-02-15 10:56:06,685 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 10:56:06,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:56:06,686 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:06,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 10:56:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2023-02-15 10:56:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-02-15 10:56:06,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2023-02-15 10:56:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:06,690 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-02-15 10:56:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-02-15 10:56:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 10:56:06,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:06,691 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:06,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 10:56:06,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 378239783, now seen corresponding path program 1 times [2023-02-15 10:56:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:06,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484452839] [2023-02-15 10:56:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:06,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484452839] [2023-02-15 10:56:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484452839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:56:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351796967] [2023-02-15 10:56:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:06,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:06,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:56:06,855 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) [2023-02-15 10:56:06,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:56:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:06,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:56:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:56:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:56:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:07,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351796967] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:56:07,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:56:07,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2023-02-15 10:56:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592911532] [2023-02-15 10:56:07,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:56:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:56:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:56:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:56:07,136 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:07,222 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-02-15 10:56:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:56:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 10:56:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:07,223 INFO L225 Difference]: With dead ends: 42 [2023-02-15 10:56:07,223 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 10:56:07,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:56:07,224 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:07,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:07,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 10:56:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-02-15 10:56:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-15 10:56:07,228 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2023-02-15 10:56:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:07,229 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-15 10:56:07,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-15 10:56:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 10:56:07,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:07,230 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:07,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:56:07,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 10:56:07,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1449098431, now seen corresponding path program 1 times [2023-02-15 10:56:07,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949699873] [2023-02-15 10:56:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:07,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949699873] [2023-02-15 10:56:07,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949699873] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:56:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852277228] [2023-02-15 10:56:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:07,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:56:07,501 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) [2023-02-15 10:56:07,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:56:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:56:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:56:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:07,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:56:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:07,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852277228] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:56:07,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:56:07,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-15 10:56:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422663812] [2023-02-15 10:56:07,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:56:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:56:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:56:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:56:07,610 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:07,685 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2023-02-15 10:56:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:56:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 10:56:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:07,686 INFO L225 Difference]: With dead ends: 76 [2023-02-15 10:56:07,686 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 10:56:07,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:56:07,687 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 73 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:07,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 50 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:56:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 10:56:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2023-02-15 10:56:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-15 10:56:07,692 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 19 [2023-02-15 10:56:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:07,692 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-15 10:56:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-15 10:56:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 10:56:07,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:07,693 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:07,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:56:07,898 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,SelfDestructingSolverStorable6 [2023-02-15 10:56:07,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:07,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2036522239, now seen corresponding path program 2 times [2023-02-15 10:56:07,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:07,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018917227] [2023-02-15 10:56:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:09,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:09,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018917227] [2023-02-15 10:56:09,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018917227] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:56:09,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862009009] [2023-02-15 10:56:09,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:56:09,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:56:09,245 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) [2023-02-15 10:56:09,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:56:09,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:56:09,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:56:09,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 10:56:09,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:56:09,369 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 66 treesize of output 61 [2023-02-15 10:56:09,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-02-15 10:56:09,385 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:56:09,694 INFO L321 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2023-02-15 10:56:09,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 66 [2023-02-15 10:56:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:09,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:56:10,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2023-02-15 10:56:10,691 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 10:56:10,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 1 [2023-02-15 10:56:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:10,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862009009] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:56:10,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:56:10,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2023-02-15 10:56:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625412346] [2023-02-15 10:56:10,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:56:10,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 10:56:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 10:56:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2023-02-15 10:56:10,695 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:14,678 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-02-15 10:56:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 10:56:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 10:56:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:14,678 INFO L225 Difference]: With dead ends: 67 [2023-02-15 10:56:14,678 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 10:56:14,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=748, Invalid=2114, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 10:56:14,680 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:14,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 69 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 10:56:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 10:56:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-02-15 10:56:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-02-15 10:56:14,686 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 19 [2023-02-15 10:56:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:14,686 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-02-15 10:56:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-02-15 10:56:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 10:56:14,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:14,687 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:14,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:56:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:14,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1681921167, now seen corresponding path program 1 times [2023-02-15 10:56:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318311282] [2023-02-15 10:56:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:15,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318311282] [2023-02-15 10:56:15,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318311282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:56:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563352863] [2023-02-15 10:56:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:15,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:15,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:56:15,469 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) [2023-02-15 10:56:15,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:56:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 10:56:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:56:15,558 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 7 treesize of output 6 [2023-02-15 10:56:15,591 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 72 treesize of output 65 [2023-02-15 10:56:15,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2023-02-15 10:56:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 10:56:15,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:56:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 10:56:18,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563352863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:56:18,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:56:18,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 16 [2023-02-15 10:56:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994405301] [2023-02-15 10:56:18,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:56:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 10:56:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:56:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 10:56:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:56:18,766 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:56:20,295 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-02-15 10:56:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 10:56:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 10:56:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:56:20,296 INFO L225 Difference]: With dead ends: 52 [2023-02-15 10:56:20,296 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 10:56:20,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2023-02-15 10:56:20,297 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:56:20,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 10:56:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 10:56:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-02-15 10:56:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-15 10:56:20,303 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2023-02-15 10:56:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:56:20,303 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-15 10:56:20,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:56:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-15 10:56:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 10:56:20,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:56:20,304 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:56:20,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:56:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:20,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:56:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:56:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1535441543, now seen corresponding path program 3 times [2023-02-15 10:56:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:56:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614598629] [2023-02-15 10:56:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:56:20,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:56:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:56:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:56:23,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:56:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614598629] [2023-02-15 10:56:23,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614598629] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:56:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959421129] [2023-02-15 10:56:23,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:56:23,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:56:23,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:56:23,148 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) [2023-02-15 10:56:23,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:56:23,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 10:56:23,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:56:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 10:56:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:56:23,482 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 66 treesize of output 61 [2023-02-15 10:56:23,485 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:56:23,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-02-15 10:56:24,698 INFO L321 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-02-15 10:56:24,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 92