./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/min_max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/heap-data/min_max.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:59:32,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:59:32,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:59:32,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:59:32,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:59:32,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:59:32,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:59:32,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:59:32,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:59:32,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:59:32,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:59:32,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:59:32,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:59:32,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:59:32,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:59:32,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:59:32,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:59:32,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:59:32,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:59:32,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:59:32,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:59:32,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:59:32,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:59:32,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:59:32,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:59:32,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:59:32,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:59:32,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:59:32,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:59:32,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:59:32,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:59:32,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:59:32,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:59:32,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:59:32,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:59:32,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:59:32,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:59:32,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:59:32,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:59:32,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:59:32,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:59:32,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:59:32,952 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:59:32,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:59:32,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:59:32,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:59:32,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:59:32,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:59:32,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:59:32,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:59:32,954 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:59:32,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:59:32,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:59:32,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:59:32,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:59:32,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:59:32,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:59:32,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:59:32,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:59:32,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:59:32,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:59:32,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:59:32,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:59:32,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:59:32,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:59:32,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:59:32,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:59:32,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:59:32,958 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:59:32,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:59:32,959 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:59:32,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d [2023-02-14 22:59:33,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:59:33,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:59:33,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:59:33,192 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:59:33,192 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:59:33,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/min_max.i [2023-02-14 22:59:34,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:59:34,357 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:59:34,358 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i [2023-02-14 22:59:34,367 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a18570d/3412f015856c42289240653d25b29418/FLAGfa12148c9 [2023-02-14 22:59:34,380 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a18570d/3412f015856c42289240653d25b29418 [2023-02-14 22:59:34,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:59:34,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:59:34,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:59:34,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:59:34,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:59:34,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce3ec28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34, skipping insertion in model container [2023-02-14 22:59:34,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:59:34,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:59:34,571 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/heap-data/min_max.i[23535,23548] [2023-02-14 22:59:34,574 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/heap-data/min_max.i[23590,23603] [2023-02-14 22:59:34,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:59:34,580 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:59:34,603 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/heap-data/min_max.i[23535,23548] [2023-02-14 22:59:34,604 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/heap-data/min_max.i[23590,23603] [2023-02-14 22:59:34,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:59:34,622 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:59:34,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34 WrapperNode [2023-02-14 22:59:34,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:59:34,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:59:34,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:59:34,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:59:34,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,654 INFO L138 Inliner]: procedures = 121, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2023-02-14 22:59:34,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:59:34,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:59:34,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:59:34,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:59:34,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:59:34,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:59:34,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:59:34,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:59:34,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (1/1) ... [2023-02-14 22:59:34,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:59:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:34,710 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) [2023-02-14 22:59:34,719 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 [2023-02-14 22:59:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:59:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:59:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:59:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:59:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 22:59:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 22:59:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:59:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:59:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:59:34,814 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:59:34,816 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:59:34,951 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:59:34,956 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:59:34,956 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 22:59:34,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:59:34 BoogieIcfgContainer [2023-02-14 22:59:34,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:59:34,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:59:34,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:59:34,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:59:34,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:59:34" (1/3) ... [2023-02-14 22:59:34,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa875dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:59:34, skipping insertion in model container [2023-02-14 22:59:34,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:59:34" (2/3) ... [2023-02-14 22:59:34,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa875dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:59:34, skipping insertion in model container [2023-02-14 22:59:34,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:59:34" (3/3) ... [2023-02-14 22:59:34,964 INFO L112 eAbstractionObserver]: Analyzing ICFG min_max.i [2023-02-14 22:59:34,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:59:34,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-14 22:59:35,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:59:35,019 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;@1416b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:59:35,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-14 22:59:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 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) [2023-02-14 22:59:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 22:59:35,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:35,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:35,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1825905474, now seen corresponding path program 1 times [2023-02-14 22:59:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:35,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503590993] [2023-02-14 22:59:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503590993] [2023-02-14 22:59:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503590993] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:59:35,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:59:35,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 22:59:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660985507] [2023-02-14 22:59:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:59:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 22:59:35,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 22:59:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:59:35,149 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:35,159 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-02-14 22:59:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 22:59:35,161 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-14 22:59:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:35,165 INFO L225 Difference]: With dead ends: 33 [2023-02-14 22:59:35,165 INFO L226 Difference]: Without dead ends: 17 [2023-02-14 22:59:35,167 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 [2023-02-14 22:59:35,169 INFO L413 NwaCegarLoop]: 23 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, 23 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 [2023-02-14 22:59:35,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:59:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-14 22:59:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-14 22:59:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 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) [2023-02-14 22:59:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-14 22:59:35,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2023-02-14 22:59:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:35,209 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-14 22:59:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-14 22:59:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 22:59:35,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:35,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:35,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 22:59:35,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash 178093936, now seen corresponding path program 1 times [2023-02-14 22:59:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:35,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492814152] [2023-02-14 22:59:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492814152] [2023-02-14 22:59:35,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492814152] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:59:35,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:59:35,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:59:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821665792] [2023-02-14 22:59:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:59:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:59:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:59:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:59:35,304 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:35,331 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-02-14 22:59:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:59:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 22:59:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:35,332 INFO L225 Difference]: With dead ends: 30 [2023-02-14 22:59:35,332 INFO L226 Difference]: Without dead ends: 19 [2023-02-14 22:59:35,333 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 [2023-02-14 22:59:35,333 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:35,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:59:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-14 22:59:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-14 22:59:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 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) [2023-02-14 22:59:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-14 22:59:35,337 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2023-02-14 22:59:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:35,337 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-14 22:59:35,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-14 22:59:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 22:59:35,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:35,338 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:35,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 22:59:35,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1651856839, now seen corresponding path program 1 times [2023-02-14 22:59:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:35,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118217856] [2023-02-14 22:59:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:35,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118217856] [2023-02-14 22:59:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118217856] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:59:35,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:59:35,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:59:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186576965] [2023-02-14 22:59:35,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:59:35,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:59:35,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:59:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:59:35,661 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:35,742 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-02-14 22:59:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:59:35,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 22:59:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:35,745 INFO L225 Difference]: With dead ends: 28 [2023-02-14 22:59:35,745 INFO L226 Difference]: Without dead ends: 26 [2023-02-14 22:59:35,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:59:35,750 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:35,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:59:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-14 22:59:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-02-14 22:59:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-02-14 22:59:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-14 22:59:35,753 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-02-14 22:59:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:35,754 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-14 22:59:35,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-14 22:59:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 22:59:35,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:35,755 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:35,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 22:59:35,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1703602811, now seen corresponding path program 1 times [2023-02-14 22:59:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:35,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850634607] [2023-02-14 22:59:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:35,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850634607] [2023-02-14 22:59:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850634607] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:59:35,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:59:35,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 22:59:35,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221751962] [2023-02-14 22:59:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:59:35,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 22:59:35,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 22:59:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:59:35,950 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2023-02-14 22:59:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:36,080 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-02-14 22:59:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:59:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 [2023-02-14 22:59:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:36,082 INFO L225 Difference]: With dead ends: 40 [2023-02-14 22:59:36,082 INFO L226 Difference]: Without dead ends: 38 [2023-02-14 22:59:36,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:59:36,090 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:36,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:59:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-14 22:59:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-02-14 22:59:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 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) [2023-02-14 22:59:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-14 22:59:36,100 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2023-02-14 22:59:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:36,101 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-14 22:59:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2023-02-14 22:59:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-14 22:59:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 22:59:36,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:36,102 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:36,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 22:59:36,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1911306115, now seen corresponding path program 1 times [2023-02-14 22:59:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:36,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624495380] [2023-02-14 22:59:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:36,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624495380] [2023-02-14 22:59:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624495380] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:59:36,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:59:36,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:59:36,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036053615] [2023-02-14 22:59:36,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:59:36,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:59:36,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:59:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:59:36,193 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2023-02-14 22:59:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:36,264 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-02-14 22:59:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:59:36,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 [2023-02-14 22:59:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:36,267 INFO L225 Difference]: With dead ends: 55 [2023-02-14 22:59:36,267 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 22:59:36,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:59:36,268 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:36,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:59:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 22:59:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-14 22:59:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-02-14 22:59:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-14 22:59:36,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2023-02-14 22:59:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:36,276 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-14 22:59:36,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2023-02-14 22:59:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-14 22:59:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 22:59:36,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:36,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:36,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 22:59:36,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1682596603, now seen corresponding path program 1 times [2023-02-14 22:59:36,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:36,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533825424] [2023-02-14 22:59:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:36,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:36,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533825424] [2023-02-14 22:59:36,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533825424] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:59:36,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:59:36,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:59:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284773102] [2023-02-14 22:59:36,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:59:36,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:59:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:36,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:59:36,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:59:36,487 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2023-02-14 22:59:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:36,606 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-02-14 22:59:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:59:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 [2023-02-14 22:59:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:36,607 INFO L225 Difference]: With dead ends: 36 [2023-02-14 22:59:36,607 INFO L226 Difference]: Without dead ends: 34 [2023-02-14 22:59:36,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:59:36,608 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:36,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:59:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-14 22:59:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-14 22:59:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 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) [2023-02-14 22:59:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-14 22:59:36,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2023-02-14 22:59:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:36,616 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-14 22:59:36,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2023-02-14 22:59:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-14 22:59:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 22:59:36,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:36,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 22:59:36,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1593313461, now seen corresponding path program 1 times [2023-02-14 22:59:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19557444] [2023-02-14 22:59:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:36,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19557444] [2023-02-14 22:59:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19557444] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248737049] [2023-02-14 22:59:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:36,807 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) [2023-02-14 22:59:36,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:59:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:36,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 22:59:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:36,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:36,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:37,069 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 15 treesize of output 7 [2023-02-14 22:59:37,073 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 15 treesize of output 7 [2023-02-14 22:59:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:37,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248737049] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:37,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:37,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-02-14 22:59:37,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913325474] [2023-02-14 22:59:37,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:37,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:59:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:59:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:59:37,137 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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) [2023-02-14 22:59:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:37,239 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2023-02-14 22:59:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:59:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 18 [2023-02-14 22:59:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:37,240 INFO L225 Difference]: With dead ends: 46 [2023-02-14 22:59:37,240 INFO L226 Difference]: Without dead ends: 30 [2023-02-14 22:59:37,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:59:37,241 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:37,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 80 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:59:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-14 22:59:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-14 22:59:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 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) [2023-02-14 22:59:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-14 22:59:37,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2023-02-14 22:59:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:37,250 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-14 22:59:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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) [2023-02-14 22:59:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-14 22:59:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 22:59:37,251 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:37,251 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:37,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 22:59:37,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:37,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1667695916, now seen corresponding path program 2 times [2023-02-14 22:59:37,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:37,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511288641] [2023-02-14 22:59:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:59:37,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511288641] [2023-02-14 22:59:37,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511288641] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117527251] [2023-02-14 22:59:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:59:37,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:37,673 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) [2023-02-14 22:59:37,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:59:37,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:59:37,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:59:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 22:59:37,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:37,915 INFO L321 Elim1Store]: treesize reduction 48, result has 35.1 percent of original size [2023-02-14 22:59:37,916 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 1 case distinctions, treesize of input 35 treesize of output 49 [2023-02-14 22:59:37,950 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 19 treesize of output 7 [2023-02-14 22:59:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:59:37,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:38,029 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 19 treesize of output 7 [2023-02-14 22:59:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:59:38,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117527251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:38,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2023-02-14 22:59:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187521943] [2023-02-14 22:59:38,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 22:59:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 22:59:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:59:38,037 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-02-14 22:59:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:38,262 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2023-02-14 22:59:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:59:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 23 [2023-02-14 22:59:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:38,266 INFO L225 Difference]: With dead ends: 107 [2023-02-14 22:59:38,266 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 22:59:38,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-02-14 22:59:38,268 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:38,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 115 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:59:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 22:59:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2023-02-14 22:59:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:59:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-02-14 22:59:38,278 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 23 [2023-02-14 22:59:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:38,278 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-02-14 22:59:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-02-14 22:59:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-02-14 22:59:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 22:59:38,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:38,279 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:38,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:59:38,484 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,SelfDestructingSolverStorable7 [2023-02-14 22:59:38,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1409530478, now seen corresponding path program 1 times [2023-02-14 22:59:38,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718947793] [2023-02-14 22:59:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:39,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718947793] [2023-02-14 22:59:39,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718947793] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223843776] [2023-02-14 22:59:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:39,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:39,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:39,150 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) [2023-02-14 22:59:39,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:59:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 22:59:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:39,217 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 6 treesize of output 5 [2023-02-14 22:59:39,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:39,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:39,293 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 22:59:39,293 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 22:59:39,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:59:39,306 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 22:59:39,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 22:59:39,421 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 27 treesize of output 15 [2023-02-14 22:59:39,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 22:59:39,451 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 15 treesize of output 7 [2023-02-14 22:59:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:39,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:39,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223843776] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:39,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:39,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 24 [2023-02-14 22:59:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504973472] [2023-02-14 22:59:39,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 22:59:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 22:59:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=491, Unknown=1, NotChecked=0, Total=552 [2023-02-14 22:59:39,602 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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) [2023-02-14 22:59:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:41,639 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2023-02-14 22:59:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 22:59:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 23 [2023-02-14 22:59:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:41,640 INFO L225 Difference]: With dead ends: 212 [2023-02-14 22:59:41,640 INFO L226 Difference]: Without dead ends: 210 [2023-02-14 22:59:41,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=610, Invalid=2811, Unknown=1, NotChecked=0, Total=3422 [2023-02-14 22:59:41,641 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 505 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:41,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 174 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:59:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-14 22:59:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 75. [2023-02-14 22:59:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 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) [2023-02-14 22:59:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2023-02-14 22:59:41,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 23 [2023-02-14 22:59:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:41,658 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2023-02-14 22:59:41,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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) [2023-02-14 22:59:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2023-02-14 22:59:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 22:59:41,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:41,659 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:41,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:59:41,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:41,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1032365076, now seen corresponding path program 1 times [2023-02-14 22:59:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795218961] [2023-02-14 22:59:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:41,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:59:41,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795218961] [2023-02-14 22:59:41,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795218961] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049520708] [2023-02-14 22:59:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:41,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:41,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:41,932 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) [2023-02-14 22:59:41,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:59:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 22:59:42,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:42,008 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 19 treesize of output 7 [2023-02-14 22:59:42,026 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 21 treesize of output 9 [2023-02-14 22:59:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:59:42,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:42,059 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 23 treesize of output 11 [2023-02-14 22:59:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:59:42,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049520708] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:42,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:42,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-02-14 22:59:42,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187886098] [2023-02-14 22:59:42,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:42,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 22:59:42,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 22:59:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:59:42,080 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-02-14 22:59:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:42,238 INFO L93 Difference]: Finished difference Result 206 states and 249 transitions. [2023-02-14 22:59:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:59:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 23 [2023-02-14 22:59:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:42,239 INFO L225 Difference]: With dead ends: 206 [2023-02-14 22:59:42,239 INFO L226 Difference]: Without dead ends: 165 [2023-02-14 22:59:42,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-02-14 22:59:42,240 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:42,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 129 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:59:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-14 22:59:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 87. [2023-02-14 22:59:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 86 states have internal predecessors, (112), 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) [2023-02-14 22:59:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2023-02-14 22:59:42,250 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 23 [2023-02-14 22:59:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:42,250 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2023-02-14 22:59:42,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-02-14 22:59:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2023-02-14 22:59:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 22:59:42,251 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:42,251 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:42,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 22:59:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:42,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1290530514, now seen corresponding path program 1 times [2023-02-14 22:59:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075301456] [2023-02-14 22:59:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:42,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075301456] [2023-02-14 22:59:42,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075301456] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056496729] [2023-02-14 22:59:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:42,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:42,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:42,769 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) [2023-02-14 22:59:42,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:59:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 22:59:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:42,838 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 6 treesize of output 5 [2023-02-14 22:59:42,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:42,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:42,893 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 22:59:42,894 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 22:59:42,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:59:42,909 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 22:59:42,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 22:59:43,053 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 15 treesize of output 7 [2023-02-14 22:59:43,056 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 25 treesize of output 17 [2023-02-14 22:59:43,083 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 22:59:43,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2023-02-14 22:59:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:43,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:43,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:43,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2023-02-14 22:59:43,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:43,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-02-14 22:59:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:43,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056496729] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:43,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:43,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2023-02-14 22:59:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175525644] [2023-02-14 22:59:43,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:43,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 22:59:43,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 22:59:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:59:43,327 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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) [2023-02-14 22:59:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:43,869 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-02-14 22:59:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 22:59:43,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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 23 [2023-02-14 22:59:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:43,870 INFO L225 Difference]: With dead ends: 133 [2023-02-14 22:59:43,870 INFO L226 Difference]: Without dead ends: 131 [2023-02-14 22:59:43,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 22:59:43,871 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 170 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:43,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 198 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 22:59:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-14 22:59:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 49. [2023-02-14 22:59:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 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) [2023-02-14 22:59:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-02-14 22:59:43,878 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 23 [2023-02-14 22:59:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:43,878 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-02-14 22:59:43,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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) [2023-02-14 22:59:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-02-14 22:59:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 22:59:43,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:43,879 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:43,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 22:59:44,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 22:59:44,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1643965548, now seen corresponding path program 1 times [2023-02-14 22:59:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457435063] [2023-02-14 22:59:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:44,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:44,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457435063] [2023-02-14 22:59:44,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457435063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:44,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549118242] [2023-02-14 22:59:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:44,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:44,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:44,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:59:44,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:59:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 22:59:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:44,352 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 6 treesize of output 5 [2023-02-14 22:59:44,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:44,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:44,419 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 22:59:44,419 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 22:59:44,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:59:44,430 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 22:59:44,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 22:59:44,520 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 27 treesize of output 15 [2023-02-14 22:59:44,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 22:59:44,542 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 15 treesize of output 7 [2023-02-14 22:59:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:44,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:44,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:44,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2023-02-14 22:59:44,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 22:59:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:44,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549118242] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:44,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:44,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2023-02-14 22:59:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481849238] [2023-02-14 22:59:44,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:44,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 22:59:44,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 22:59:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-02-14 22:59:44,683 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2023-02-14 22:59:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:45,055 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2023-02-14 22:59:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:59:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 25 [2023-02-14 22:59:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:45,056 INFO L225 Difference]: With dead ends: 102 [2023-02-14 22:59:45,056 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 22:59:45,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-02-14 22:59:45,057 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:45,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 130 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:59:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 22:59:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2023-02-14 22:59:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 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) [2023-02-14 22:59:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-02-14 22:59:45,069 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 25 [2023-02-14 22:59:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:45,070 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-02-14 22:59:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2023-02-14 22:59:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-02-14 22:59:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 22:59:45,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:45,071 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:45,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 22:59:45,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:45,276 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1055550124, now seen corresponding path program 1 times [2023-02-14 22:59:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825098609] [2023-02-14 22:59:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:45,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:45,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825098609] [2023-02-14 22:59:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825098609] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715343002] [2023-02-14 22:59:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:45,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:59:45,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 22:59:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-14 22:59:45,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:45,753 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 6 treesize of output 5 [2023-02-14 22:59:45,756 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 6 treesize of output 5 [2023-02-14 22:59:45,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:45,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:45,821 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 22:59:45,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 22:59:45,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 22:59:46,050 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 25 treesize of output 17 [2023-02-14 22:59:46,054 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 15 treesize of output 7 [2023-02-14 22:59:46,090 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 22:59:46,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2023-02-14 22:59:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:46,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:46,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715343002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:46,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:46,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2023-02-14 22:59:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862221766] [2023-02-14 22:59:46,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 22:59:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 22:59:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=562, Unknown=1, NotChecked=0, Total=650 [2023-02-14 22:59:46,288 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) [2023-02-14 22:59:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:47,173 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2023-02-14 22:59:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 22:59:47,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 25 [2023-02-14 22:59:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:47,173 INFO L225 Difference]: With dead ends: 124 [2023-02-14 22:59:47,174 INFO L226 Difference]: Without dead ends: 122 [2023-02-14 22:59:47,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1327, Unknown=1, NotChecked=0, Total=1640 [2023-02-14 22:59:47,174 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 252 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:47,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 193 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:59:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-14 22:59:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2023-02-14 22:59:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 74 states have internal predecessors, (92), 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) [2023-02-14 22:59:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2023-02-14 22:59:47,189 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 25 [2023-02-14 22:59:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:47,191 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2023-02-14 22:59:47,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) [2023-02-14 22:59:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2023-02-14 22:59:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 22:59:47,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:47,195 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:47,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 22:59:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:47,401 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1550473430, now seen corresponding path program 1 times [2023-02-14 22:59:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:47,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865344143] [2023-02-14 22:59:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:47,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:47,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865344143] [2023-02-14 22:59:47,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865344143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:47,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873690783] [2023-02-14 22:59:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:47,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:47,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:47,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:59:47,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 22:59:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 22:59:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:47,906 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 6 treesize of output 5 [2023-02-14 22:59:47,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:47,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:47,963 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 22:59:47,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 22:59:47,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 22:59:48,143 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 31 treesize of output 19 [2023-02-14 22:59:48,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 22:59:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-02-14 22:59:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:48,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:48,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:48,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2023-02-14 22:59:48,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:48,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2023-02-14 22:59:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:48,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873690783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:48,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:48,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-02-14 22:59:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668028076] [2023-02-14 22:59:48,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:48,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 22:59:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 22:59:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2023-02-14 22:59:48,500 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 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) [2023-02-14 22:59:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:50,781 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2023-02-14 22:59:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 22:59:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 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 25 [2023-02-14 22:59:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:50,791 INFO L225 Difference]: With dead ends: 228 [2023-02-14 22:59:50,791 INFO L226 Difference]: Without dead ends: 226 [2023-02-14 22:59:50,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=819, Invalid=3737, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 22:59:50,793 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 257 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 313 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 22:59:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-14 22:59:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 51. [2023-02-14 22:59:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 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) [2023-02-14 22:59:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-02-14 22:59:50,804 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2023-02-14 22:59:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:50,804 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-02-14 22:59:50,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 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) [2023-02-14 22:59:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-02-14 22:59:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:59:50,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:50,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:50,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 22:59:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 22:59:51,012 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 138316690, now seen corresponding path program 2 times [2023-02-14 22:59:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110684209] [2023-02-14 22:59:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110684209] [2023-02-14 22:59:51,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110684209] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447992972] [2023-02-14 22:59:51,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:59:51,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:51,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:59:51,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 22:59:51,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:59:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:59:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 22:59:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:51,404 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 6 treesize of output 5 [2023-02-14 22:59:51,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:51,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:51,445 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 22:59:51,450 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 22:59:51,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:51,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 22:59:51,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:51,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 22:59:51,464 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 22:59:51,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 22:59:51,630 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-14 22:59:51,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2023-02-14 22:59:51,636 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 22:59:51,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 22:59:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:51,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:51,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:51,690 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-02-14 22:59:51,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:51,694 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-02-14 22:59:51,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-14 22:59:51,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-14 22:59:51,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:51,788 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-14 22:59:51,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2023-02-14 22:59:51,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:59:51,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-02-14 22:59:51,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:51,798 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-02-14 22:59:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:59:51,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-02-14 22:59:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:51,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447992972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:51,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:51,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2023-02-14 22:59:51,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98984144] [2023-02-14 22:59:51,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:51,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 22:59:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 22:59:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:59:51,806 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2023-02-14 22:59:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:52,046 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2023-02-14 22:59:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:59:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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 28 [2023-02-14 22:59:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:52,048 INFO L225 Difference]: With dead ends: 89 [2023-02-14 22:59:52,048 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 22:59:52,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-02-14 22:59:52,050 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:52,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 163 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:59:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 22:59:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-14 22:59:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 67 states have internal predecessors, (83), 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) [2023-02-14 22:59:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-02-14 22:59:52,058 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 28 [2023-02-14 22:59:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:52,058 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-02-14 22:59:52,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2023-02-14 22:59:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-02-14 22:59:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 22:59:52,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:52,060 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:52,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 22:59:52,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 22:59:52,265 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash -334041831, now seen corresponding path program 3 times [2023-02-14 22:59:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922702410] [2023-02-14 22:59:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:53,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922702410] [2023-02-14 22:59:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922702410] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400750105] [2023-02-14 22:59:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:59:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:53,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:59:53,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 22:59:53,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 22:59:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:59:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 22:59:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:53,224 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 6 treesize of output 5 [2023-02-14 22:59:53,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:53,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:53,306 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 22:59:53,306 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 22:59:53,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:59:53,322 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 22:59:53,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 22:59:53,412 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 22:59:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:53,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 22:59:53,418 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 22:59:53,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:53,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 22:59:53,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:53,432 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 22:59:53,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 22:59:53,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-14 22:59:53,682 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 22:59:53,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2023-02-14 22:59:53,692 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 22:59:53,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 22:59:53,717 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 15 treesize of output 7 [2023-02-14 22:59:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:53,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:53,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:53,851 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 22:59:53,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:53,855 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-02-14 22:59:53,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:53,951 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 58 [2023-02-14 22:59:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:59:53,954 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 55 treesize of output 43 [2023-02-14 22:59:53,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-02-14 22:59:53,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:53,962 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-02-14 22:59:53,964 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:59:53,965 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 28 treesize of output 20 [2023-02-14 22:59:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:54,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400750105] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:59:54,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:59:54,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 31 [2023-02-14 22:59:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385725414] [2023-02-14 22:59:54,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:59:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 22:59:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:59:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 22:59:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=850, Unknown=1, NotChecked=0, Total=930 [2023-02-14 22:59:54,069 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 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) [2023-02-14 22:59:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:59:58,126 INFO L93 Difference]: Finished difference Result 308 states and 354 transitions. [2023-02-14 22:59:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-14 22:59:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 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 33 [2023-02-14 22:59:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:59:58,128 INFO L225 Difference]: With dead ends: 308 [2023-02-14 22:59:58,128 INFO L226 Difference]: Without dead ends: 306 [2023-02-14 22:59:58,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1189, Invalid=5616, Unknown=1, NotChecked=0, Total=6806 [2023-02-14 22:59:58,130 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 637 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:59:58,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 309 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 22:59:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-14 22:59:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 147. [2023-02-14 22:59:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.296551724137931) internal successors, (188), 146 states have internal predecessors, (188), 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) [2023-02-14 22:59:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2023-02-14 22:59:58,149 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 33 [2023-02-14 22:59:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:59:58,149 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2023-02-14 22:59:58,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 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) [2023-02-14 22:59:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2023-02-14 22:59:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 22:59:58,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:59:58,150 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:59:58,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 22:59:58,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 22:59:58,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:59:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:59:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1488915417, now seen corresponding path program 1 times [2023-02-14 22:59:58,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:59:58,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116896698] [2023-02-14 22:59:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:58,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:59:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:58,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:59:58,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116896698] [2023-02-14 22:59:58,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116896698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:59:58,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288034293] [2023-02-14 22:59:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:59:58,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:59:58,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:59:58,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:59:58,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 22:59:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:59:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-14 22:59:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:59:59,024 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 6 treesize of output 5 [2023-02-14 22:59:59,027 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 6 treesize of output 5 [2023-02-14 22:59:59,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:59,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:59:59,099 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 22:59:59,099 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 22:59:59,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:59:59,122 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 22:59:59,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 22:59:59,250 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 22:59:59,255 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 22:59:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:59,263 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-02-14 22:59:59,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-02-14 22:59:59,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:59,275 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-02-14 22:59:59,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2023-02-14 22:59:59,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-14 22:59:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:59,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 22:59:59,586 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-14 22:59:59,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 54 [2023-02-14 22:59:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:59:59,594 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 22:59:59,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 22:59:59,640 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-14 22:59:59,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2023-02-14 22:59:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:59:59,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:59:59,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:59,800 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-14 22:59:59,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:59,805 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-02-14 22:59:59,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 22:59:59,990 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2023-02-14 22:59:59,993 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:59:59,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-02-14 22:59:59,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2023-02-14 23:00:00,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:00,003 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-02-14 23:00:00,005 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:00,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2023-02-14 23:00:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288034293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:00,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:00,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 34 [2023-02-14 23:00:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836799912] [2023-02-14 23:00:00,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:00,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 23:00:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 23:00:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1007, Unknown=3, NotChecked=0, Total=1122 [2023-02-14 23:00:00,353 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 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) [2023-02-14 23:00:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:03,665 INFO L93 Difference]: Finished difference Result 284 states and 338 transitions. [2023-02-14 23:00:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 23:00:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 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 33 [2023-02-14 23:00:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:03,668 INFO L225 Difference]: With dead ends: 284 [2023-02-14 23:00:03,668 INFO L226 Difference]: Without dead ends: 282 [2023-02-14 23:00:03,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=693, Invalid=3207, Unknown=6, NotChecked=0, Total=3906 [2023-02-14 23:00:03,671 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 326 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 7 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:03,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 469 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 864 Invalid, 17 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 23:00:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-14 23:00:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 145. [2023-02-14 23:00:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.3006993006993006) internal successors, (186), 144 states have internal predecessors, (186), 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) [2023-02-14 23:00:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 186 transitions. [2023-02-14 23:00:03,694 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 186 transitions. Word has length 33 [2023-02-14 23:00:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:03,695 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 186 transitions. [2023-02-14 23:00:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 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) [2023-02-14 23:00:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 186 transitions. [2023-02-14 23:00:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 23:00:03,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:03,696 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:03,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 23:00:03,901 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1108473179, now seen corresponding path program 2 times [2023-02-14 23:00:03,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:03,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308911341] [2023-02-14 23:00:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:03,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:04,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308911341] [2023-02-14 23:00:04,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308911341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900189132] [2023-02-14 23:00:04,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:00:04,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:04,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:04,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:00:04,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:00:04,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-14 23:00:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:04,562 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 6 treesize of output 5 [2023-02-14 23:00:04,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:04,602 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:04,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:04,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:04,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:04,668 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:04,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:04,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:00:04,681 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 23:00:04,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-14 23:00:04,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:00:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:04,693 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 23:00:04,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 23:00:04,698 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:04,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:04,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:04,921 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 23:00:04,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2023-02-14 23:00:04,927 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 23:00:04,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 23:00:04,948 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 15 treesize of output 7 [2023-02-14 23:00:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:04,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:05,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:05,033 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 23:00:05,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:05,036 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-02-14 23:00:05,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:05,098 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2023-02-14 23:00:05,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:05,101 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 63 treesize of output 47 [2023-02-14 23:00:05,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-02-14 23:00:05,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:05,106 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-02-14 23:00:05,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:05,109 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 32 treesize of output 20 [2023-02-14 23:00:05,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:05,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 73 [2023-02-14 23:00:05,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-02-14 23:00:05,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-14 23:00:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:05,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900189132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:05,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:05,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2023-02-14 23:00:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515058565] [2023-02-14 23:00:05,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:05,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 23:00:05,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 23:00:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:00:05,242 INFO L87 Difference]: Start difference. First operand 145 states and 186 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 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) [2023-02-14 23:00:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:05,953 INFO L93 Difference]: Finished difference Result 321 states and 394 transitions. [2023-02-14 23:00:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 23:00:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 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 35 [2023-02-14 23:00:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:05,954 INFO L225 Difference]: With dead ends: 321 [2023-02-14 23:00:05,954 INFO L226 Difference]: Without dead ends: 319 [2023-02-14 23:00:05,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 23:00:05,955 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 224 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:05,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 222 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:00:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-14 23:00:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 233. [2023-02-14 23:00:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.329004329004329) internal successors, (307), 232 states have internal predecessors, (307), 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) [2023-02-14 23:00:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 307 transitions. [2023-02-14 23:00:06,021 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 307 transitions. Word has length 35 [2023-02-14 23:00:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:06,021 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 307 transitions. [2023-02-14 23:00:06,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 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) [2023-02-14 23:00:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 307 transitions. [2023-02-14 23:00:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 23:00:06,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:06,022 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:06,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 23:00:06,227 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2065136743, now seen corresponding path program 2 times [2023-02-14 23:00:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495081265] [2023-02-14 23:00:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495081265] [2023-02-14 23:00:06,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495081265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736916963] [2023-02-14 23:00:06,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:00:06,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:06,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:06,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:06,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:00:06,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:00:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-14 23:00:06,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:06,970 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 6 treesize of output 5 [2023-02-14 23:00:06,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:07,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:07,012 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:07,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:07,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:07,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:07,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,216 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-02-14 23:00:07,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-02-14 23:00:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-02-14 23:00:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,230 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 23:00:07,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 23:00:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:07,572 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-14 23:00:07,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 54 [2023-02-14 23:00:07,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:07,578 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 23:00:07,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 23:00:07,655 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-14 23:00:07,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2023-02-14 23:00:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:07,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:07,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:07,864 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-14 23:00:07,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:07,869 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-02-14 23:00:08,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:08,098 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2023-02-14 23:00:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:08,102 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 59 treesize of output 47 [2023-02-14 23:00:08,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-02-14 23:00:08,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:08,111 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-02-14 23:00:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:08,114 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 32 treesize of output 24 [2023-02-14 23:00:08,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:08,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 88 [2023-02-14 23:00:08,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:08,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2023-02-14 23:00:08,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:08,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 63 [2023-02-14 23:00:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:08,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736916963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:08,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:08,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 38 [2023-02-14 23:00:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174871] [2023-02-14 23:00:08,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:08,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 23:00:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 23:00:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 23:00:08,556 INFO L87 Difference]: Start difference. First operand 233 states and 307 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 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) [2023-02-14 23:00:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:11,616 INFO L93 Difference]: Finished difference Result 506 states and 596 transitions. [2023-02-14 23:00:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-14 23:00:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 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 35 [2023-02-14 23:00:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:11,621 INFO L225 Difference]: With dead ends: 506 [2023-02-14 23:00:11,621 INFO L226 Difference]: Without dead ends: 504 [2023-02-14 23:00:11,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=991, Invalid=5171, Unknown=0, NotChecked=0, Total=6162 [2023-02-14 23:00:11,622 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 719 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:11,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 461 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 23:00:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-14 23:00:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 265. [2023-02-14 23:00:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 263 states have (on average 1.3460076045627376) internal successors, (354), 264 states have internal predecessors, (354), 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) [2023-02-14 23:00:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 354 transitions. [2023-02-14 23:00:11,689 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 354 transitions. Word has length 35 [2023-02-14 23:00:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:11,689 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 354 transitions. [2023-02-14 23:00:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 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) [2023-02-14 23:00:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 354 transitions. [2023-02-14 23:00:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 23:00:11,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:11,690 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:11,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:11,895 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -678933349, now seen corresponding path program 2 times [2023-02-14 23:00:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:11,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076263554] [2023-02-14 23:00:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076263554] [2023-02-14 23:00:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076263554] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:12,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989502772] [2023-02-14 23:00:12,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:00:12,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:12,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:12,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 23:00:12,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:00:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-14 23:00:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:12,651 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 6 treesize of output 5 [2023-02-14 23:00:12,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:12,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2023-02-14 23:00:12,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:12,772 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:12,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:12,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:12,923 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:12,927 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:12,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-02-14 23:00:12,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:12,942 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 23:00:12,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 59 [2023-02-14 23:00:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:12,959 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 23:00:12,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 23:00:12,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:12,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:13,446 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-14 23:00:13,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 67 [2023-02-14 23:00:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:13,459 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 23:00:13,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 23:00:13,528 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 23:00:13,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2023-02-14 23:00:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:13,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:13,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:13,670 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-14 23:00:13,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:13,676 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-02-14 23:00:13,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:13,860 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 72 [2023-02-14 23:00:13,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:13,864 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 69 treesize of output 57 [2023-02-14 23:00:13,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 58 [2023-02-14 23:00:13,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:13,871 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2023-02-14 23:00:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:13,874 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 40 treesize of output 32 [2023-02-14 23:00:14,025 INFO L321 Elim1Store]: treesize reduction 47, result has 50.5 percent of original size [2023-02-14 23:00:14,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 67 [2023-02-14 23:00:14,047 INFO L321 Elim1Store]: treesize reduction 4, result has 88.2 percent of original size [2023-02-14 23:00:14,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 94 [2023-02-14 23:00:14,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:14,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-02-14 23:00:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:14,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989502772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:14,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:14,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2023-02-14 23:00:14,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571524639] [2023-02-14 23:00:14,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 23:00:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 23:00:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1294, Unknown=1, NotChecked=0, Total=1406 [2023-02-14 23:00:14,440 INFO L87 Difference]: Start difference. First operand 265 states and 354 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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) [2023-02-14 23:00:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:28,346 INFO L93 Difference]: Finished difference Result 665 states and 775 transitions. [2023-02-14 23:00:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-14 23:00:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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 35 [2023-02-14 23:00:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:28,352 INFO L225 Difference]: With dead ends: 665 [2023-02-14 23:00:28,352 INFO L226 Difference]: Without dead ends: 663 [2023-02-14 23:00:28,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5423 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2903, Invalid=16553, Unknown=4, NotChecked=0, Total=19460 [2023-02-14 23:00:28,358 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 735 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 20 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:28,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 715 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2103 Invalid, 18 Unknown, 0 Unchecked, 1.7s Time] [2023-02-14 23:00:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-02-14 23:00:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 233. [2023-02-14 23:00:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.329004329004329) internal successors, (307), 232 states have internal predecessors, (307), 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) [2023-02-14 23:00:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 307 transitions. [2023-02-14 23:00:28,425 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 307 transitions. Word has length 35 [2023-02-14 23:00:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:28,426 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 307 transitions. [2023-02-14 23:00:28,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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) [2023-02-14 23:00:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 307 transitions. [2023-02-14 23:00:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 23:00:28,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:28,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:28,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 23:00:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:28,632 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1475182485, now seen corresponding path program 4 times [2023-02-14 23:00:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:28,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531219903] [2023-02-14 23:00:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531219903] [2023-02-14 23:00:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531219903] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886120563] [2023-02-14 23:00:29,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:00:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:29,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:29,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 23:00:29,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:00:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 23:00:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:29,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:29,272 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 6 treesize of output 5 [2023-02-14 23:00:29,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:29,336 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:29,340 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:29,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:29,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 23:00:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:29,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 23:00:29,361 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:29,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:29,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:29,438 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:29,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2023-02-14 23:00:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:29,457 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 23:00:29,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-02-14 23:00:29,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:29,466 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 23:00:29,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 23:00:29,795 INFO L321 Elim1Store]: treesize reduction 85, result has 11.5 percent of original size [2023-02-14 23:00:29,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 74 [2023-02-14 23:00:29,806 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-14 23:00:29,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 23:00:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:29,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:29,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:29,875 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-02-14 23:00:29,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:29,879 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2023-02-14 23:00:30,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:30,024 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 127 [2023-02-14 23:00:30,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:30,030 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 118 [2023-02-14 23:00:30,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:30,351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2023-02-14 23:00:30,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:30,356 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 54 [2023-02-14 23:00:30,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:30,359 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 42 treesize of output 36 [2023-02-14 23:00:30,362 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:30,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 74 [2023-02-14 23:00:30,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2023-02-14 23:00:30,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2023-02-14 23:00:30,381 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 23:00:30,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-02-14 23:00:30,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:30,407 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-02-14 23:00:30,409 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:30,415 INFO L321 Elim1Store]: treesize reduction 32, result has 11.1 percent of original size [2023-02-14 23:00:30,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 222 [2023-02-14 23:00:30,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:30,429 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 152 [2023-02-14 23:00:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:30,432 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 80 treesize of output 74 [2023-02-14 23:00:30,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2023-02-14 23:00:30,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:30,446 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-14 23:00:30,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-02-14 23:00:30,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-02-14 23:00:30,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-02-14 23:00:30,454 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 23:00:30,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2023-02-14 23:00:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:30,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886120563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:30,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:30,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2023-02-14 23:00:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265696192] [2023-02-14 23:00:30,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 23:00:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 23:00:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2023-02-14 23:00:30,463 INFO L87 Difference]: Start difference. First operand 233 states and 307 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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) [2023-02-14 23:00:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:31,108 INFO L93 Difference]: Finished difference Result 302 states and 398 transitions. [2023-02-14 23:00:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 23:00:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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 38 [2023-02-14 23:00:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:31,109 INFO L225 Difference]: With dead ends: 302 [2023-02-14 23:00:31,109 INFO L226 Difference]: Without dead ends: 276 [2023-02-14 23:00:31,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-02-14 23:00:31,110 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:31,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 308 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:00:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-14 23:00:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2023-02-14 23:00:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 274 states have (on average 1.302919708029197) internal successors, (357), 275 states have internal predecessors, (357), 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) [2023-02-14 23:00:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 357 transitions. [2023-02-14 23:00:31,165 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 357 transitions. Word has length 38 [2023-02-14 23:00:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:31,165 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 357 transitions. [2023-02-14 23:00:31,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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) [2023-02-14 23:00:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 357 transitions. [2023-02-14 23:00:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 23:00:31,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:31,166 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:31,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:31,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:31,371 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1043415982, now seen corresponding path program 2 times [2023-02-14 23:00:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:31,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275075288] [2023-02-14 23:00:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:00:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275075288] [2023-02-14 23:00:31,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275075288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706835810] [2023-02-14 23:00:31,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:00:31,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:31,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:31,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 23:00:31,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:00:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 23:00:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:31,603 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 19 treesize of output 7 [2023-02-14 23:00:31,615 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 21 treesize of output 9 [2023-02-14 23:00:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:00:31,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:31,640 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 23 treesize of output 11 [2023-02-14 23:00:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:00:31,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706835810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:31,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:31,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-02-14 23:00:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098375601] [2023-02-14 23:00:31,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:31,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 23:00:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 23:00:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-02-14 23:00:31,665 INFO L87 Difference]: Start difference. First operand 276 states and 357 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2023-02-14 23:00:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:31,900 INFO L93 Difference]: Finished difference Result 472 states and 584 transitions. [2023-02-14 23:00:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 23:00:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 38 [2023-02-14 23:00:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:31,903 INFO L225 Difference]: With dead ends: 472 [2023-02-14 23:00:31,903 INFO L226 Difference]: Without dead ends: 341 [2023-02-14 23:00:31,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:00:31,904 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:31,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:00:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-02-14 23:00:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 255. [2023-02-14 23:00:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 253 states have (on average 1.2806324110671936) internal successors, (324), 254 states have internal predecessors, (324), 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) [2023-02-14 23:00:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 324 transitions. [2023-02-14 23:00:31,955 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 324 transitions. Word has length 38 [2023-02-14 23:00:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:31,956 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 324 transitions. [2023-02-14 23:00:31,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2023-02-14 23:00:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 324 transitions. [2023-02-14 23:00:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 23:00:31,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:31,957 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:31,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:32,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-14 23:00:32,162 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1328323280, now seen corresponding path program 3 times [2023-02-14 23:00:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992564968] [2023-02-14 23:00:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:33,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992564968] [2023-02-14 23:00:33,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992564968] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:33,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102801341] [2023-02-14 23:00:33,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:00:33,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:33,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:33,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 23:00:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 23:00:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-14 23:00:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:33,216 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 6 treesize of output 5 [2023-02-14 23:00:33,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:33,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:33,289 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 23:00:33,289 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 23:00:33,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:00:33,306 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:33,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:33,392 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:33,396 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:33,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:33,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:00:33,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:33,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:33,420 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 23:00:33,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 23:00:33,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-14 23:00:33,629 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 23:00:33,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2023-02-14 23:00:33,635 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 23:00:33,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 23:00:33,657 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 15 treesize of output 7 [2023-02-14 23:00:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:00:33,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:33,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:33,772 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 23:00:33,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:33,776 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-02-14 23:00:33,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:33,860 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 58 [2023-02-14 23:00:33,862 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:33,863 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 55 treesize of output 43 [2023-02-14 23:00:33,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-02-14 23:00:33,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:33,869 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-02-14 23:00:33,871 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:33,872 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 28 treesize of output 20 [2023-02-14 23:00:33,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:33,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 73 [2023-02-14 23:00:33,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-02-14 23:00:33,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-14 23:00:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:00:34,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102801341] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:34,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:34,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 33 [2023-02-14 23:00:34,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762236693] [2023-02-14 23:00:34,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 23:00:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 23:00:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 23:00:34,045 INFO L87 Difference]: Start difference. First operand 255 states and 324 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 33 states have internal predecessors, (97), 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) [2023-02-14 23:00:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:37,262 INFO L93 Difference]: Finished difference Result 468 states and 579 transitions. [2023-02-14 23:00:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 23:00:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 33 states have internal predecessors, (97), 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 38 [2023-02-14 23:00:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:37,265 INFO L225 Difference]: With dead ends: 468 [2023-02-14 23:00:37,265 INFO L226 Difference]: Without dead ends: 466 [2023-02-14 23:00:37,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=988, Invalid=3704, Unknown=0, NotChecked=0, Total=4692 [2023-02-14 23:00:37,267 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 541 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:37,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 191 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:00:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-14 23:00:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 136. [2023-02-14 23:00:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.2313432835820894) internal successors, (165), 135 states have internal predecessors, (165), 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) [2023-02-14 23:00:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2023-02-14 23:00:37,326 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 38 [2023-02-14 23:00:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:37,326 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2023-02-14 23:00:37,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 33 states have internal predecessors, (97), 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) [2023-02-14 23:00:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2023-02-14 23:00:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 23:00:37,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:37,341 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:37,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:37,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:37,561 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash -185000460, now seen corresponding path program 3 times [2023-02-14 23:00:37,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:37,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313109476] [2023-02-14 23:00:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:37,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:38,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:38,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313109476] [2023-02-14 23:00:38,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313109476] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:38,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137057891] [2023-02-14 23:00:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:00:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:38,681 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:38,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 23:00:38,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 23:00:38,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 23:00:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:38,851 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 6 treesize of output 5 [2023-02-14 23:00:38,855 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 6 treesize of output 5 [2023-02-14 23:00:38,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:38,939 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:38,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:38,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:38,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:39,019 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:39,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:00:39,026 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:39,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:39,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:39,039 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-14 23:00:39,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 23:00:39,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-14 23:00:39,300 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 23:00:39,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2023-02-14 23:00:39,307 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 23:00:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-14 23:00:39,337 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 15 treesize of output 7 [2023-02-14 23:00:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:00:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:39,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:39,449 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 23:00:39,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:39,453 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-02-14 23:00:39,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:39,536 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2023-02-14 23:00:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:39,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2023-02-14 23:00:39,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-02-14 23:00:39,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:39,548 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-02-14 23:00:39,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:39,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2023-02-14 23:00:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:00:39,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137057891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:39,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:39,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 35 [2023-02-14 23:00:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758310312] [2023-02-14 23:00:39,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 23:00:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 23:00:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1090, Unknown=3, NotChecked=0, Total=1190 [2023-02-14 23:00:39,717 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2023-02-14 23:00:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:00:43,317 INFO L93 Difference]: Finished difference Result 228 states and 261 transitions. [2023-02-14 23:00:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 23:00:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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 40 [2023-02-14 23:00:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:00:43,318 INFO L225 Difference]: With dead ends: 228 [2023-02-14 23:00:43,318 INFO L226 Difference]: Without dead ends: 226 [2023-02-14 23:00:43,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1240, Invalid=5399, Unknown=3, NotChecked=0, Total=6642 [2023-02-14 23:00:43,327 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 532 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:00:43,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 174 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:00:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-14 23:00:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 73. [2023-02-14 23:00:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 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) [2023-02-14 23:00:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2023-02-14 23:00:43,360 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 40 [2023-02-14 23:00:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:00:43,360 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2023-02-14 23:00:43,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2023-02-14 23:00:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2023-02-14 23:00:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:00:43,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:00:43,361 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:00:43,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 23:00:43,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:43,562 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:00:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:00:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash -901782222, now seen corresponding path program 5 times [2023-02-14 23:00:43,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:00:43,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390658269] [2023-02-14 23:00:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:00:43,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:00:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:00:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:45,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:00:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390658269] [2023-02-14 23:00:45,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390658269] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:00:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698006643] [2023-02-14 23:00:45,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:00:45,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:00:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:00:45,261 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:00:45,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 23:00:45,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 23:00:45,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:00:45,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-14 23:00:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:00:45,494 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 6 treesize of output 5 [2023-02-14 23:00:45,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:45,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:00:45,582 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:00:45,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:00:45,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:45,779 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:45,782 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:45,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2023-02-14 23:00:45,804 INFO L321 Elim1Store]: treesize reduction 60, result has 36.8 percent of original size [2023-02-14 23:00:45,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 49 [2023-02-14 23:00:45,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2023-02-14 23:00:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:00:45,929 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:45,933 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:00:45,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,945 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 23:00:45,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 86 [2023-02-14 23:00:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,952 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-02-14 23:00:45,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-02-14 23:00:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-02-14 23:00:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:45,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 48 [2023-02-14 23:00:46,447 INFO L321 Elim1Store]: treesize reduction 77, result has 19.8 percent of original size [2023-02-14 23:00:46,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 195 treesize of output 101 [2023-02-14 23:00:46,459 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-14 23:00:46,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 23:00:46,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-02-14 23:00:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:00:46,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:00:46,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:46,642 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 70 [2023-02-14 23:00:46,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:46,646 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2023-02-14 23:00:46,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:46,792 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 121 [2023-02-14 23:00:46,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:46,814 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 112 [2023-02-14 23:00:46,825 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_66 (Array Int Int)) (v_arrayElimArr_68 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_83| Int) (v_arrayElimArr_67 (Array Int Int)) (v_arrayElimArr_69 (Array Int Int)) (v_ArrVal_1566 (Array Int Int)) (v_ArrVal_1560 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_67 0)) (.cse0 (select v_arrayElimArr_66 0))) (or (not (= (select |c_#valid| .cse0) 0)) (not (= |c_ULTIMATE.start_main_~l~0#1.base| (select v_arrayElimArr_68 0))) (not (= (select v_arrayElimArr_69 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= 0 .cse1)) (not (= (select (store |c_#valid| .cse0 1) |v_ULTIMATE.start_main_~l~0#1.base_83|) 0)) (<= |c_ULTIMATE.start_main_~min~0#1| (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse0 v_arrayElimArr_69) |v_ULTIMATE.start_main_~l~0#1.base_83| v_arrayElimArr_67)) (.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_68) |v_ULTIMATE.start_main_~l~0#1.base_83| v_arrayElimArr_66))) (let ((.cse3 (select (select .cse2 .cse0) .cse1)) (.cse4 (select (select .cse5 .cse0) .cse1))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1560) |v_ULTIMATE.start_main_~l~0#1.base_83| v_ArrVal_1566) (select (select .cse2 .cse3) .cse4)) (+ (select (select .cse5 .cse3) .cse4) 4)))))))) is different from false [2023-02-14 23:00:47,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:47,146 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 161 [2023-02-14 23:00:47,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:47,153 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 125 [2023-02-14 23:00:47,156 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:47,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:47,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:47,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 63 [2023-02-14 23:00:47,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 92 [2023-02-14 23:00:47,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2023-02-14 23:00:47,170 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:47,170 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:00:47,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:00:47,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-02-14 23:00:47,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:47,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 170 [2023-02-14 23:00:47,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 138 [2023-02-14 23:00:47,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2023-02-14 23:00:47,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:00:47,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 121 [2023-02-14 23:00:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 43 refuted. 2 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-14 23:00:47,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698006643] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:00:47,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:00:47,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 15] total 47 [2023-02-14 23:00:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851533964] [2023-02-14 23:00:47,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:00:47,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 23:00:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:00:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 23:00:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1918, Unknown=4, NotChecked=88, Total=2162 [2023-02-14 23:00:47,624 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 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) [2023-02-14 23:01:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:01:22,267 INFO L93 Difference]: Finished difference Result 919 states and 1010 transitions. [2023-02-14 23:01:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2023-02-14 23:01:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 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 43 [2023-02-14 23:01:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:01:22,272 INFO L225 Difference]: With dead ends: 919 [2023-02-14 23:01:22,272 INFO L226 Difference]: Without dead ends: 917 [2023-02-14 23:01:22,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 81 SyntacticMatches, 28 SemanticMatches, 225 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18243 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=6611, Invalid=44208, Unknown=35, NotChecked=448, Total=51302 [2023-02-14 23:01:22,298 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1418 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 3167 mSolverCounterSat, 66 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3167 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:01:22,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 732 Invalid, 3540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3167 Invalid, 45 Unknown, 262 Unchecked, 3.9s Time] [2023-02-14 23:01:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2023-02-14 23:01:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 259. [2023-02-14 23:01:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.2996108949416343) internal successors, (334), 258 states have internal predecessors, (334), 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) [2023-02-14 23:01:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 334 transitions. [2023-02-14 23:01:22,497 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 334 transitions. Word has length 43 [2023-02-14 23:01:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:01:22,497 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 334 transitions. [2023-02-14 23:01:22,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 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) [2023-02-14 23:01:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 334 transitions. [2023-02-14 23:01:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:01:22,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:01:22,498 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:01:22,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 23:01:22,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:01:22,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:01:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:01:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2140995186, now seen corresponding path program 4 times [2023-02-14 23:01:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:01:22,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388831251] [2023-02-14 23:01:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:01:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:01:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:01:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:01:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:01:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388831251] [2023-02-14 23:01:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388831251] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:01:23,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991763363] [2023-02-14 23:01:23,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:01:23,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:01:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:01:23,584 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:01:23,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 23:01:23,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:01:23,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:01:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-14 23:01:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:01:23,761 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 6 treesize of output 5 [2023-02-14 23:01:23,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:01:23,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:01:23,844 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 23:01:23,845 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 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-14 23:01:23,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:01:23,866 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:01:23,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:01:23,975 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:23,979 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:23,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:01:23,998 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 23:01:23,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-14 23:01:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:01:24,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:01:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,024 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-14 23:01:24,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-02-14 23:01:24,195 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:24,200 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2023-02-14 23:01:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,217 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-02-14 23:01:24,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 42 [2023-02-14 23:01:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,229 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 23:01:24,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 71 [2023-02-14 23:01:24,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,247 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-02-14 23:01:24,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-02-14 23:01:24,769 INFO L321 Elim1Store]: treesize reduction 81, result has 15.6 percent of original size [2023-02-14 23:01:24,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 97 [2023-02-14 23:01:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:24,779 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-14 23:01:24,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 23:01:24,835 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-14 23:01:24,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2023-02-14 23:01:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:01:24,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:01:25,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:25,083 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 74 [2023-02-14 23:01:25,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:25,090 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-02-14 23:01:25,103 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_77 (Array Int Int)) (v_arrayElimArr_76 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_90| Int) (v_ArrVal_1694 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1694 4))) (or (< .cse0 (+ (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_90| v_arrayElimArr_77)) (.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_90| v_arrayElimArr_76))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse3 (select (select .cse4 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_90| v_ArrVal_1694) (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 4)))) 1)) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_77 0))) (not (= |c_ULTIMATE.start_main_~l~0#1.base| (select v_arrayElimArr_76 0))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_90|) 0)) (< |c_ULTIMATE.start_main_~min~0#1| (+ .cse0 1))))) is different from false [2023-02-14 23:01:25,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:25,248 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 117 [2023-02-14 23:01:25,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:25,255 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 108 [2023-02-14 23:01:25,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:25,486 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 153 [2023-02-14 23:01:25,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:25,495 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 117 [2023-02-14 23:01:25,499 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:25,500 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:25,500 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 59 [2023-02-14 23:01:25,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:25,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 166 [2023-02-14 23:01:25,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 169 [2023-02-14 23:01:25,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 139 [2023-02-14 23:01:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2023-02-14 23:01:27,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991763363] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:01:27,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:01:27,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 40 [2023-02-14 23:01:27,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875039598] [2023-02-14 23:01:27,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:01:27,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 23:01:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:01:27,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 23:01:27,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1363, Unknown=1, NotChecked=74, Total=1560 [2023-02-14 23:01:27,200 INFO L87 Difference]: Start difference. First operand 259 states and 334 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 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) [2023-02-14 23:01:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:01:34,692 INFO L93 Difference]: Finished difference Result 514 states and 619 transitions. [2023-02-14 23:01:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-14 23:01:34,693 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 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 43 [2023-02-14 23:01:34,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:01:34,695 INFO L225 Difference]: With dead ends: 514 [2023-02-14 23:01:34,695 INFO L226 Difference]: Without dead ends: 512 [2023-02-14 23:01:34,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1488, Invalid=6705, Unknown=1, NotChecked=178, Total=8372 [2023-02-14 23:01:34,696 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 523 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:01:34,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 666 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1216 Invalid, 0 Unknown, 133 Unchecked, 1.0s Time] [2023-02-14 23:01:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-02-14 23:01:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 297. [2023-02-14 23:01:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 295 states have (on average 1.3152542372881355) internal successors, (388), 296 states have internal predecessors, (388), 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) [2023-02-14 23:01:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 388 transitions. [2023-02-14 23:01:34,836 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 388 transitions. Word has length 43 [2023-02-14 23:01:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:01:34,837 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 388 transitions. [2023-02-14 23:01:34,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 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) [2023-02-14 23:01:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 388 transitions. [2023-02-14 23:01:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:01:34,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:01:34,838 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:01:34,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 23:01:35,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-14 23:01:35,044 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:01:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:01:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1476214582, now seen corresponding path program 5 times [2023-02-14 23:01:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:01:35,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382140179] [2023-02-14 23:01:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:01:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:01:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:01:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:01:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:01:35,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382140179] [2023-02-14 23:01:35,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382140179] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:01:35,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865099710] [2023-02-14 23:01:35,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:01:35,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:01:35,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:01:35,782 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:01:35,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 23:01:36,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 23:01:36,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:01:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-14 23:01:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:01:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-14 23:01:36,265 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 6 treesize of output 5 [2023-02-14 23:01:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2023-02-14 23:01:36,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:01:36,352 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:01:36,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:01:36,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:01:36,495 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:36,500 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:01:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:01:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,527 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-14 23:01:36,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-02-14 23:01:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2023-02-14 23:01:36,666 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:36,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,682 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 23:01:36,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 89 [2023-02-14 23:01:36,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,696 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-02-14 23:01:36,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-02-14 23:01:36,700 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:01:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-02-14 23:01:36,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:36,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 51 [2023-02-14 23:01:37,364 INFO L321 Elim1Store]: treesize reduction 81, result has 15.6 percent of original size [2023-02-14 23:01:37,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 102 [2023-02-14 23:01:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:37,378 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-14 23:01:37,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 23:01:37,443 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-14 23:01:37,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 26 [2023-02-14 23:01:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:01:37,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:01:37,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:37,764 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 74 [2023-02-14 23:01:37,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:37,769 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-02-14 23:01:37,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:37,918 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 133 [2023-02-14 23:01:37,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:37,922 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 118 [2023-02-14 23:01:38,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:38,216 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2023-02-14 23:01:38,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:38,222 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 141 [2023-02-14 23:01:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:01:38,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 77 [2023-02-14 23:01:38,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 100 [2023-02-14 23:01:38,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2023-02-14 23:01:38,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2023-02-14 23:01:38,459 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:01:38,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2023-02-14 23:01:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,472 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:01:38,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-02-14 23:01:38,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 23:01:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:01:38,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865099710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:01:38,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:01:38,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2023-02-14 23:01:38,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191385911] [2023-02-14 23:01:38,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:01:38,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 23:01:38,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:01:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 23:01:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1762, Unknown=1, NotChecked=0, Total=1892 [2023-02-14 23:01:38,518 INFO L87 Difference]: Start difference. First operand 297 states and 388 transitions. Second operand has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 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) [2023-02-14 23:02:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:02:27,995 INFO L93 Difference]: Finished difference Result 854 states and 982 transitions. [2023-02-14 23:02:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-02-14 23:02:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 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 43 [2023-02-14 23:02:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:02:27,998 INFO L225 Difference]: With dead ends: 854 [2023-02-14 23:02:27,998 INFO L226 Difference]: Without dead ends: 852 [2023-02-14 23:02:27,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10539 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=4868, Invalid=30157, Unknown=131, NotChecked=0, Total=35156 [2023-02-14 23:02:28,000 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1717 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 34 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:02:28,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 1019 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1987 Invalid, 35 Unknown, 0 Unchecked, 3.9s Time] [2023-02-14 23:02:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-02-14 23:02:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 230. [2023-02-14 23:02:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 228 states have (on average 1.293859649122807) internal successors, (295), 229 states have internal predecessors, (295), 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) [2023-02-14 23:02:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 295 transitions. [2023-02-14 23:02:28,125 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 295 transitions. Word has length 43 [2023-02-14 23:02:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:02:28,125 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 295 transitions. [2023-02-14 23:02:28,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 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) [2023-02-14 23:02:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 295 transitions. [2023-02-14 23:02:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:02:28,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:02:28,126 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:02:28,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 23:02:28,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-14 23:02:28,332 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:02:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:02:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1473257422, now seen corresponding path program 1 times [2023-02-14 23:02:28,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:02:28,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084938686] [2023-02-14 23:02:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:02:28,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:02:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:02:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:02:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:02:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084938686] [2023-02-14 23:02:29,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084938686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:02:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134260804] [2023-02-14 23:02:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:02:29,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:02:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:02:29,025 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:02:29,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 23:02:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:02:29,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-14 23:02:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:02:29,191 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 6 treesize of output 5 [2023-02-14 23:02:29,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:02:29,254 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:02:29,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:02:29,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:02:29,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:02:29,339 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:02:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:02:29,356 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 23:02:29,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-14 23:02:29,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:02:29,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:02:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:02:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,389 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-14 23:02:29,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-02-14 23:02:29,518 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:02:29,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:02:29,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,536 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 23:02:29,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 71 [2023-02-14 23:02:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-02-14 23:02:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:29,563 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-02-14 23:02:29,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-02-14 23:02:29,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-02-14 23:02:30,082 INFO L321 Elim1Store]: treesize reduction 77, result has 19.8 percent of original size [2023-02-14 23:02:30,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 90 [2023-02-14 23:02:30,097 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-14 23:02:30,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 23:02:30,122 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 15 treesize of output 7 [2023-02-14 23:02:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:02:30,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:02:30,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:30,281 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 70 [2023-02-14 23:02:30,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:30,285 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2023-02-14 23:02:30,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:30,388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 113 [2023-02-14 23:02:30,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:30,394 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 104 [2023-02-14 23:02:30,412 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_99 (Array Int Int)) (v_ArrVal_1945 (Array Int Int)) (v_arrayElimArr_98 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_105| Int) (v_arrayElimArr_100 (Array Int Int)) (v_ArrVal_1949 (Array Int Int)) (v_arrayElimArr_97 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_97 0))) (or (not (= (select (store |c_#valid| .cse0 1) |v_ULTIMATE.start_main_~l~0#1.base_105|) 0)) (not (= (select |c_#valid| .cse0) 0)) (<= |c_ULTIMATE.start_main_~min~0#1| (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| .cse0 v_arrayElimArr_99) |v_ULTIMATE.start_main_~l~0#1.base_105| v_arrayElimArr_98)) (.cse1 (store (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_100) |v_ULTIMATE.start_main_~l~0#1.base_105| v_arrayElimArr_97))) (let ((.cse2 (select (select .cse1 .cse0) 0)) (.cse3 (select (select .cse4 .cse0) 0))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1945) |v_ULTIMATE.start_main_~l~0#1.base_105| v_ArrVal_1949) (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 4))))) (not (= (select v_arrayElimArr_98 0) 0)) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_99 0))) (not (= (select v_arrayElimArr_100 0) |c_ULTIMATE.start_main_~l~0#1.base|))))) is different from false [2023-02-14 23:02:30,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:30,494 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 157 [2023-02-14 23:02:30,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:30,501 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 115 [2023-02-14 23:02:30,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:02:30,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:02:30,505 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:02:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:02:30,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 55 [2023-02-14 23:02:30,512 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 23:02:30,514 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 342 treesize of output 318 [2023-02-14 23:02:30,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 293 [2023-02-14 23:02:30,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 235 [2023-02-14 23:02:42,521 WARN L233 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 70 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:02:42,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 23:02:42,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2075 treesize of output 1996 [2023-02-14 23:02:42,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1980 treesize of output 1940 [2023-02-14 23:02:42,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1940 treesize of output 1928 [2023-02-14 23:02:42,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1928 treesize of output 1908 [2023-02-14 23:02:42,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1908 treesize of output 1876 [2023-02-14 23:02:42,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1876 treesize of output 1744 [2023-02-14 23:02:42,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1744 treesize of output 1676 [2023-02-14 23:02:42,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1676 treesize of output 1660 [2023-02-14 23:02:42,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1660 treesize of output 1628 [2023-02-14 23:02:42,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1628 treesize of output 1564 [2023-02-14 23:03:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2023-02-14 23:03:54,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134260804] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:03:54,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:03:54,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 32 [2023-02-14 23:03:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196731544] [2023-02-14 23:03:54,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:03:54,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 23:03:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:03:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 23:03:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=840, Unknown=1, NotChecked=58, Total=992 [2023-02-14 23:03:54,193 INFO L87 Difference]: Start difference. First operand 230 states and 295 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 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) [2023-02-14 23:03:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:03:56,417 INFO L93 Difference]: Finished difference Result 240 states and 305 transitions. [2023-02-14 23:03:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 23:03:56,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 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 43 [2023-02-14 23:03:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:03:56,418 INFO L225 Difference]: With dead ends: 240 [2023-02-14 23:03:56,418 INFO L226 Difference]: Without dead ends: 238 [2023-02-14 23:03:56,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=408, Invalid=1575, Unknown=1, NotChecked=86, Total=2070 [2023-02-14 23:03:56,419 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 405 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 23:03:56,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 195 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 0 Unknown, 40 Unchecked, 0.5s Time] [2023-02-14 23:03:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-14 23:03:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 76. [2023-02-14 23:03:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 75 states have internal predecessors, (89), 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) [2023-02-14 23:03:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2023-02-14 23:03:56,476 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 43 [2023-02-14 23:03:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:03:56,476 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2023-02-14 23:03:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 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) [2023-02-14 23:03:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2023-02-14 23:03:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 23:03:56,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:03:56,477 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:03:56,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 23:03:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-14 23:03:56,682 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:03:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:03:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash 970804020, now seen corresponding path program 4 times [2023-02-14 23:03:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:03:56,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403189152] [2023-02-14 23:03:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:03:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:03:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:03:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:03:57,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:03:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403189152] [2023-02-14 23:03:57,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403189152] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:03:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213988594] [2023-02-14 23:03:57,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:03:57,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:03:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:03:57,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:03:57,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 23:03:57,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:03:57,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:03:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-14 23:03:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:03:57,572 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 6 treesize of output 5 [2023-02-14 23:03:57,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:03:57,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 23:03:57,647 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 23:03:57,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 23:03:57,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:03:57,720 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:03:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-14 23:03:57,737 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 23:03:57,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-14 23:03:57,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:03:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,752 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-14 23:03:57,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-02-14 23:03:57,759 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:03:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 23:03:57,851 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:03:57,869 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 23:03:57,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,880 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 23:03:57,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 71 [2023-02-14 23:03:57,902 INFO L321 Elim1Store]: treesize reduction 35, result has 48.5 percent of original size [2023-02-14 23:03:57,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 44 [2023-02-14 23:03:57,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 23:03:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,927 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-02-14 23:03:57,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-02-14 23:03:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 23:03:57,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-02-14 23:03:58,561 INFO L321 Elim1Store]: treesize reduction 77, result has 19.8 percent of original size [2023-02-14 23:03:58,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 90 [2023-02-14 23:03:58,574 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-14 23:03:58,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 23:03:58,603 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 15 treesize of output 7 [2023-02-14 23:03:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:03:58,606 INFO L328 TraceCheckSpWp]: Computing backward predicates...