./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res1o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/res1o.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:08:03,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:08:03,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:08:03,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:08:03,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:08:03,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:08:03,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:08:03,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:08:03,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:08:03,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:08:03,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:08:03,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:08:03,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:08:03,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:08:03,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:08:03,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:08:03,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:08:03,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:08:03,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:08:03,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:08:03,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:08:03,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:08:03,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:08:03,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:08:03,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:08:03,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:08:03,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:08:03,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:08:03,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:08:03,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:08:03,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:08:03,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:08:03,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:08:03,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:08:03,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:08:03,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:08:03,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:08:03,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:08:03,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:08:03,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:08:03,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:08:03,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:08:03,336 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:08:03,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:08:03,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:08:03,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:08:03,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:08:03,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:08:03,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:08:03,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:08:03,338 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:08:03,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:08:03,339 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:08:03,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:08:03,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:08:03,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:08:03,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:08:03,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:08:03,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:08:03,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:08:03,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:08:03,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:08:03,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:08:03,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:08:03,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:08:03,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:08:03,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:08:03,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:08:03,342 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:08:03,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:08:03,343 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:08:03,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf [2023-02-15 10:08:03,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:08:03,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:08:03,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:08:03,511 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:08:03,511 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:08:03,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res1o.c [2023-02-15 10:08:04,474 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:08:04,608 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:08:04,608 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res1o.c [2023-02-15 10:08:04,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce37d765a/e0b3be02a0954c75896a5140cbd975b6/FLAG26bfed0e8 [2023-02-15 10:08:04,621 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce37d765a/e0b3be02a0954c75896a5140cbd975b6 [2023-02-15 10:08:04,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:08:04,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:08:04,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:08:04,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:08:04,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:08:04,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ce3bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04, skipping insertion in model container [2023-02-15 10:08:04,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:08:04,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:08:04,772 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/array-fpi/res1o.c[588,601] [2023-02-15 10:08:04,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:08:04,802 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:08:04,813 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/array-fpi/res1o.c[588,601] [2023-02-15 10:08:04,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:08:04,836 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:08:04,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04 WrapperNode [2023-02-15 10:08:04,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:08:04,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:08:04,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:08:04,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:08:04,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,872 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-02-15 10:08:04,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:08:04,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:08:04,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:08:04,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:08:04,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,903 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:08:04,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:08:04,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:08:04,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:08:04,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (1/1) ... [2023-02-15 10:08:04,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:08:04,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:08:04,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 10:08:04,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 10:08:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:08:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:08:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 10:08:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:08:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:08:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:08:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:08:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:08:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:08:05,052 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:08:05,054 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:08:05,222 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:08:05,226 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:08:05,227 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 10:08:05,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:08:05 BoogieIcfgContainer [2023-02-15 10:08:05,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:08:05,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:08:05,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:08:05,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:08:05,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:08:04" (1/3) ... [2023-02-15 10:08:05,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d1bfea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:08:05, skipping insertion in model container [2023-02-15 10:08:05,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:08:04" (2/3) ... [2023-02-15 10:08:05,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d1bfea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:08:05, skipping insertion in model container [2023-02-15 10:08:05,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:08:05" (3/3) ... [2023-02-15 10:08:05,235 INFO L112 eAbstractionObserver]: Analyzing ICFG res1o.c [2023-02-15 10:08:05,246 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:08:05,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:08:05,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:08:05,286 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;@305632e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:08:05,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:08:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2023-02-15 10:08:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 10:08:05,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:08:05,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:08:05,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:08:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:08:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2023-02-15 10:08:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:08:05,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838094254] [2023-02-15 10:08:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:08:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:05,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:08:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838094254] [2023-02-15 10:08:05,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838094254] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:08:05,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:08:05,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:08:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121179941] [2023-02-15 10:08:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:08:05,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:08:05,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:08:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:08:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:08:05,468 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:08:05,482 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2023-02-15 10:08:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:08:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 10:08:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:08:05,488 INFO L225 Difference]: With dead ends: 44 [2023-02-15 10:08:05,489 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 10:08:05,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:08:05,493 INFO L413 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:08:05,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:08:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 10:08:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-15 10:08:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-15 10:08:05,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2023-02-15 10:08:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:08:05,517 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-15 10:08:05,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-15 10:08:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 10:08:05,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:08:05,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:08:05,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:08:05,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:08:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:08:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2023-02-15 10:08:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:08:05,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120854156] [2023-02-15 10:08:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:08:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:05,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:08:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120854156] [2023-02-15 10:08:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120854156] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:08:05,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:08:05,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:08:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536235376] [2023-02-15 10:08:05,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:08:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:08:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:08:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:08:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:08:05,648 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:08:05,706 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2023-02-15 10:08:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:08:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 10:08:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:08:05,708 INFO L225 Difference]: With dead ends: 41 [2023-02-15 10:08:05,708 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 10:08:05,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:08:05,710 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:08:05,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:08:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 10:08:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-02-15 10:08:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2023-02-15 10:08:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-15 10:08:05,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2023-02-15 10:08:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:08:05,716 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-15 10:08:05,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-15 10:08:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 10:08:05,717 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:08:05,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:08:05,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:08:05,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:08:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:08:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2023-02-15 10:08:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:08:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077730598] [2023-02-15 10:08:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:05,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:08:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:06,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:08:06,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077730598] [2023-02-15 10:08:06,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077730598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:08:06,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970893502] [2023-02-15 10:08:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:06,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:08:06,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:08:06,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:08:06,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:08:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:06,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 10:08:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:08:06,912 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 10 treesize of output 8 [2023-02-15 10:08:06,929 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 11 treesize of output 7 [2023-02-15 10:08:06,978 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 19 treesize of output 18 [2023-02-15 10:08:07,097 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-02-15 10:08:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:08:07,233 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-15 10:08:07,233 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 30 treesize of output 32 [2023-02-15 10:08:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:08:07,364 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-02-15 10:08:07,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:08:07,432 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 28 treesize of output 12 [2023-02-15 10:08:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:07,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:08:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:08:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:08:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:10,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970893502] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:08:10,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:08:10,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-02-15 10:08:10,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311373479] [2023-02-15 10:08:10,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:08:10,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 10:08:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:08:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 10:08:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=805, Unknown=1, NotChecked=0, Total=992 [2023-02-15 10:08:10,724 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:08:11,762 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-02-15 10:08:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 10:08:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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 [2023-02-15 10:08:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:08:11,764 INFO L225 Difference]: With dead ends: 40 [2023-02-15 10:08:11,764 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 10:08:11,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=396, Invalid=1583, Unknown=1, NotChecked=0, Total=1980 [2023-02-15 10:08:11,766 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:08:11,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 78 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 10:08:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 10:08:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-02-15 10:08:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2023-02-15 10:08:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-02-15 10:08:11,777 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2023-02-15 10:08:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:08:11,779 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-02-15 10:08:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-02-15 10:08:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 10:08:11,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:08:11,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:08:11,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 10:08:11,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:08:11,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:08:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:08:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2023-02-15 10:08:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:08:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106775612] [2023-02-15 10:08:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:08:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:08:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:08:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106775612] [2023-02-15 10:08:12,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106775612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:08:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389238334] [2023-02-15 10:08:12,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:08:12,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:08:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:08:12,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:08:12,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:08:12,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:08:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:08:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 10:08:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:08:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:08:12,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:08:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:08:12,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389238334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:08:12,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:08:12,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 10:08:12,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527655723] [2023-02-15 10:08:12,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:08:12,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 10:08:12,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:08:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 10:08:12,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:08:12,217 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2023-02-15 10:08:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:08:12,332 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2023-02-15 10:08:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:08:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) Word has length 25 [2023-02-15 10:08:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:08:12,333 INFO L225 Difference]: With dead ends: 80 [2023-02-15 10:08:12,333 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 10:08:12,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:08:12,334 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:08:12,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 28 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:08:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 10:08:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-02-15 10:08:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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) [2023-02-15 10:08:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-15 10:08:12,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2023-02-15 10:08:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:08:12,350 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-15 10:08:12,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2023-02-15 10:08:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-15 10:08:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 10:08:12,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:08:12,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:08:12,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 10:08:12,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 10:08:12,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:08:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:08:12,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1964080588, now seen corresponding path program 3 times [2023-02-15 10:08:12,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:08:12,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957402715] [2023-02-15 10:08:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:12,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:08:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:08:12,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:08:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957402715] [2023-02-15 10:08:12,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957402715] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:08:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777499232] [2023-02-15 10:08:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:08:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:08:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:08:12,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:08:12,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:08:12,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 10:08:12,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:08:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 10:08:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:08:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:08:12,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:08:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:08:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777499232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:08:12,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:08:12,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 10:08:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446876891] [2023-02-15 10:08:12,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:08:12,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 10:08:12,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:08:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 10:08:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:08:12,758 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2023-02-15 10:08:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:08:12,846 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-02-15 10:08:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:08:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) Word has length 27 [2023-02-15 10:08:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:08:12,846 INFO L225 Difference]: With dead ends: 43 [2023-02-15 10:08:12,846 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 10:08:12,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:08:12,847 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:08:12,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:08:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 10:08:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-02-15 10:08:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2023-02-15 10:08:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-15 10:08:12,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2023-02-15 10:08:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:08:12,852 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-15 10:08:12,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2023-02-15 10:08:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-15 10:08:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 10:08:12,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:08:12,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:08:12,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:08:13,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:08:13,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:08:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:08:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2023-02-15 10:08:13,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:08:13,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283542210] [2023-02-15 10:08:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:08:13,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:08:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:08:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:08:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283542210] [2023-02-15 10:08:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283542210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:08:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341903008] [2023-02-15 10:08:14,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 10:08:14,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:08:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:08:14,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:08:14,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:08:14,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 10:08:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:08:14,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-15 10:08:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:08:14,515 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:08:14,515 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 23 treesize of output 19 [2023-02-15 10:08:14,525 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:08:14,564 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 23 treesize of output 22 [2023-02-15 10:08:14,671 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 35 treesize of output 37 [2023-02-15 10:08:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:08:14,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:08:14,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2023-02-15 10:08:15,078 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:08:15,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-15 10:08:15,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2023-02-15 10:08:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:08:15,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 52 [2023-02-15 10:08:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:08:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:08:15,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2023-02-15 10:08:15,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2023-02-15 10:08:16,025 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 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-15 10:08:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:08:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:08:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341903008] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:08:21,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:08:21,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 62 [2023-02-15 10:08:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630857365] [2023-02-15 10:08:21,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:08:21,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 10:08:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:08:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 10:08:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=3278, Unknown=1, NotChecked=0, Total=3782 [2023-02-15 10:08:21,391 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:08:35,269 WARN L233 SmtUtils]: Spent 12.57s on a formula simplification that was a NOOP. DAG size: 206 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:08:58,117 WARN L233 SmtUtils]: Spent 21.43s on a formula simplification that was a NOOP. DAG size: 236 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:09:00,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:09:02,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:09:03,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:09:05,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:09:15,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:09:22,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:09:44,023 WARN L233 SmtUtils]: Spent 21.24s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:09:46,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 10:09:48,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 10:09:50,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 10:09:55,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:10:01,955 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:10:15,876 WARN L233 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:10:23,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:10:25,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:10:30,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:10:33,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 10:10:38,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:10:40,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:10:48,288 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:11:34,086 WARN L233 SmtUtils]: Spent 44.66s on a formula simplification. DAG size of input: 210 DAG size of output: 208 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:11:36,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:11:38,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:11:40,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 10:12:03,969 WARN L233 SmtUtils]: Spent 22.63s on a formula simplification that was a NOOP. DAG size: 225 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:12:06,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:12:22,171 WARN L233 SmtUtils]: Spent 15.08s on a formula simplification that was a NOOP. DAG size: 227 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:12:32,721 WARN L233 SmtUtils]: Spent 10.35s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:12:41,074 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:12:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:12:41,078 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2023-02-15 10:12:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-15 10:12:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 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 31 [2023-02-15 10:12:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:12:41,080 INFO L225 Difference]: With dead ends: 88 [2023-02-15 10:12:41,080 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 10:12:41,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3904 ImplicationChecksByTransitivity, 222.6s TimeCoverageRelationStatistics Valid=1593, Invalid=10611, Unknown=6, NotChecked=0, Total=12210 [2023-02-15 10:12:41,083 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 152 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:12:41,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 102 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 720 Invalid, 19 Unknown, 0 Unchecked, 43.0s Time] [2023-02-15 10:12:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 10:12:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2023-02-15 10:12:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-02-15 10:12:41,097 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 31 [2023-02-15 10:12:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:12:41,097 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-02-15 10:12:41,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-02-15 10:12:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 10:12:41,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:12:41,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:12:41,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 10:12:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:12:41,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:12:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:12:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash 207824378, now seen corresponding path program 5 times [2023-02-15 10:12:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:12:41,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694924533] [2023-02-15 10:12:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:12:41,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:12:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:12:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 10:12:41,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:12:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694924533] [2023-02-15 10:12:41,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694924533] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:12:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15937831] [2023-02-15 10:12:41,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 10:12:41,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:12:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:12:41,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:12:41,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:12:41,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 10:12:41,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:12:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:12:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:12:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 10:12:41,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:12:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 10:12:41,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15937831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:12:41,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:12:41,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 10:12:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349909381] [2023-02-15 10:12:41,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:12:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 10:12:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:12:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 10:12:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:12:41,576 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:12:41,745 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2023-02-15 10:12:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:12:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 [2023-02-15 10:12:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:12:41,746 INFO L225 Difference]: With dead ends: 133 [2023-02-15 10:12:41,746 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 10:12:41,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-15 10:12:41,747 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:12:41,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 32 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:12:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 10:12:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2023-02-15 10:12:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-02-15 10:12:41,764 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 33 [2023-02-15 10:12:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:12:41,764 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-02-15 10:12:41,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-02-15 10:12:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 10:12:41,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:12:41,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:12:41,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:12:41,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:12:41,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:12:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:12:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash 236928956, now seen corresponding path program 6 times [2023-02-15 10:12:41,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:12:41,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193713370] [2023-02-15 10:12:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:12:41,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:12:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:12:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:12:42,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:12:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193713370] [2023-02-15 10:12:42,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193713370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:12:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721724067] [2023-02-15 10:12:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 10:12:42,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:12:42,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:12:42,054 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) [2023-02-15 10:12:42,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:12:42,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 10:12:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:12:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:12:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:12:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:12:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:12:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:12:42,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721724067] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:12:42,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:12:42,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 10:12:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705856025] [2023-02-15 10:12:42,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:12:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 10:12:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:12:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 10:12:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:12:42,251 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:12:42,402 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-02-15 10:12:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:12:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 [2023-02-15 10:12:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:12:42,403 INFO L225 Difference]: With dead ends: 71 [2023-02-15 10:12:42,403 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 10:12:42,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:12:42,404 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:12:42,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 25 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:12:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 10:12:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2023-02-15 10:12:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-15 10:12:42,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2023-02-15 10:12:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:12:42,411 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-15 10:12:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:12:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-15 10:12:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 10:12:42,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:12:42,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:12:42,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 10:12:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:12:42,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:12:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:12:42,619 INFO L85 PathProgramCache]: Analyzing trace with hash 315843584, now seen corresponding path program 7 times [2023-02-15 10:12:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:12:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929929377] [2023-02-15 10:12:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:12:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:12:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:12:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:12:45,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:12:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929929377] [2023-02-15 10:12:45,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929929377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:12:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649820996] [2023-02-15 10:12:45,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 10:12:45,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:12:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:12:45,771 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) [2023-02-15 10:12:45,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:12:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:12:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-15 10:12:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:12:45,930 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 [2023-02-15 10:12:45,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:12:45,990 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 23 treesize of output 22 [2023-02-15 10:12:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:12:46,126 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 0 case distinctions, treesize of input 35 treesize of output 37 [2023-02-15 10:12:46,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:12:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:12:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:12:46,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42