./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/ntdrivers/cdaudio.i.cil-1.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 ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 22:17:03,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 22:17:03,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 22:17:03,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 22:17:03,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 22:17:03,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 22:17:03,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 22:17:03,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 22:17:03,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 22:17:03,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 22:17:03,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 22:17:03,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 22:17:03,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 22:17:03,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 22:17:03,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 22:17:03,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 22:17:03,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 22:17:03,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 22:17:03,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 22:17:03,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 22:17:03,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 22:17:03,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 22:17:03,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 22:17:03,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 22:17:03,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 22:17:03,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 22:17:03,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 22:17:03,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 22:17:03,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 22:17:03,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 22:17:03,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 22:17:03,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 22:17:03,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 22:17:03,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 22:17:03,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 22:17:03,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 22:17:03,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 22:17:03,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 22:17:03,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 22:17:03,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 22:17:03,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 22:17:03,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 22:17:03,330 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 22:17:03,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 22:17:03,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 22:17:03,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 22:17:03,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 22:17:03,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 22:17:03,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 22:17:03,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 22:17:03,332 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 22:17:03,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 22:17:03,333 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 22:17:03,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 22:17:03,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 22:17:03,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 22:17:03,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 22:17:03,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 22:17:03,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 22:17:03,334 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 22:17:03,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 22:17:03,334 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 22:17:03,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 22:17:03,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 22:17:03,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 22:17:03,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 22:17:03,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:17:03,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 22:17:03,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 22:17:03,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 22:17:03,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 22:17:03,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 22:17:03,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 22:17:03,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 22:17:03,336 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 22:17:03,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 22:17:03,337 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 22:17:03,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2023-02-17 22:17:03,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 22:17:03,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 22:17:03,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 22:17:03,545 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 22:17:03,545 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 22:17:03,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-17 22:17:04,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 22:17:04,818 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 22:17:04,819 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-17 22:17:04,839 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2e455c6a/3b0b398460244644a2bd64e37063565c/FLAG7fda9b623 [2023-02-17 22:17:04,848 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2e455c6a/3b0b398460244644a2bd64e37063565c [2023-02-17 22:17:04,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 22:17:04,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 22:17:04,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 22:17:04,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 22:17:04,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 22:17:04,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:17:04" (1/1) ... [2023-02-17 22:17:04,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec12ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:04, skipping insertion in model container [2023-02-17 22:17:04,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:17:04" (1/1) ... [2023-02-17 22:17:04,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 22:17:04,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 22:17:05,389 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/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2023-02-17 22:17:05,473 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,475 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,476 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,479 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,484 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,485 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,486 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,486 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,487 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,488 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,489 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,490 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,495 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,497 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:17:05,785 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 22:17:05,835 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/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2023-02-17 22:17:05,851 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,852 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,852 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,856 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,860 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,860 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,860 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,861 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,861 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,861 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,861 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,862 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,863 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:05,863 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 22:17:06,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:17:06,095 INFO L208 MainTranslator]: Completed translation [2023-02-17 22:17:06,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06 WrapperNode [2023-02-17 22:17:06,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 22:17:06,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 22:17:06,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 22:17:06,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 22:17:06,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,221 INFO L138 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2023-02-17 22:17:06,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 22:17:06,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 22:17:06,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 22:17:06,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 22:17:06,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,347 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 22:17:06,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 22:17:06,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 22:17:06,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 22:17:06,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (1/1) ... [2023-02-17 22:17:06,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:17:06,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:17:06,386 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) [2023-02-17 22:17:06,408 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 [2023-02-17 22:17:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-17 22:17:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-17 22:17:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-17 22:17:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 22:17:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-17 22:17:06,423 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-17 22:17:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-17 22:17:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-17 22:17:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2023-02-17 22:17:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2023-02-17 22:17:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 22:17:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2023-02-17 22:17:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2023-02-17 22:17:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2023-02-17 22:17:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2023-02-17 22:17:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-17 22:17:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-17 22:17:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-17 22:17:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-17 22:17:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2023-02-17 22:17:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2023-02-17 22:17:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-17 22:17:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-17 22:17:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 22:17:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2023-02-17 22:17:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2023-02-17 22:17:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2023-02-17 22:17:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2023-02-17 22:17:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 22:17:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 22:17:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 22:17:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-17 22:17:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-17 22:17:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-02-17 22:17:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 22:17:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2023-02-17 22:17:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2023-02-17 22:17:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2023-02-17 22:17:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2023-02-17 22:17:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 22:17:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-17 22:17:06,429 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-17 22:17:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2023-02-17 22:17:06,429 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2023-02-17 22:17:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 22:17:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2023-02-17 22:17:06,429 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2023-02-17 22:17:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-17 22:17:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-17 22:17:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-17 22:17:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 22:17:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 22:17:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2023-02-17 22:17:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2023-02-17 22:17:06,806 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 22:17:06,808 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 22:17:06,957 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:06,970 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-17 22:17:06,970 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-17 22:17:07,394 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:07,420 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2023-02-17 22:17:07,420 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2023-02-17 22:17:07,440 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:07,442 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:07,443 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:07,453 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:07,461 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:07,466 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:19,810 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2023-02-17 22:17:19,810 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2023-02-17 22:17:19,811 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2023-02-17 22:17:19,848 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 22:17:19,851 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-17 22:17:19,851 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-17 22:17:19,865 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 22:17:19,873 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 22:17:19,873 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 22:17:19,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:17:19 BoogieIcfgContainer [2023-02-17 22:17:19,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 22:17:19,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 22:17:19,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 22:17:19,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 22:17:19,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 10:17:04" (1/3) ... [2023-02-17 22:17:19,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8e285d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:17:19, skipping insertion in model container [2023-02-17 22:17:19,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:17:06" (2/3) ... [2023-02-17 22:17:19,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8e285d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:17:19, skipping insertion in model container [2023-02-17 22:17:19,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:17:19" (3/3) ... [2023-02-17 22:17:19,879 INFO L112 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2023-02-17 22:17:19,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 22:17:19,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 22:17:19,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 22:17:19,949 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;@485c8352, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 22:17:19,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 22:17:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2023-02-17 22:17:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 22:17:19,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:19,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:19,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:19,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:19,978 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2023-02-17 22:17:19,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:19,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793497910] [2023-02-17 22:17:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:20,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:20,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793497910] [2023-02-17 22:17:20,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793497910] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:20,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:20,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101698726] [2023-02-17 22:17:20,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:20,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:20,386 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:20,567 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2023-02-17 22:17:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 22:17:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:20,598 INFO L225 Difference]: With dead ends: 1237 [2023-02-17 22:17:20,598 INFO L226 Difference]: Without dead ends: 610 [2023-02-17 22:17:20,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:20,608 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:20,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:17:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-02-17 22:17:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2023-02-17 22:17:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-02-17 22:17:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2023-02-17 22:17:20,691 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2023-02-17 22:17:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:20,701 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2023-02-17 22:17:20,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2023-02-17 22:17:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 22:17:20,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:20,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 22:17:20,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2023-02-17 22:17:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:20,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935881806] [2023-02-17 22:17:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:20,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935881806] [2023-02-17 22:17:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935881806] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:20,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:20,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550563596] [2023-02-17 22:17:20,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:20,834 INFO L87 Difference]: Start difference. First operand 610 states and 920 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:21,028 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2023-02-17 22:17:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 22:17:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:21,034 INFO L225 Difference]: With dead ends: 1123 [2023-02-17 22:17:21,034 INFO L226 Difference]: Without dead ends: 882 [2023-02-17 22:17:21,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:21,035 INFO L413 NwaCegarLoop]: 1237 mSDtfsCounter, 834 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:21,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1651 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:17:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-02-17 22:17:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2023-02-17 22:17:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2023-02-17 22:17:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2023-02-17 22:17:21,090 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2023-02-17 22:17:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:21,091 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2023-02-17 22:17:21,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2023-02-17 22:17:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 22:17:21,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:21,092 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, 1, 1, 1, 1, 1] [2023-02-17 22:17:21,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 22:17:21,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2023-02-17 22:17:21,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:21,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658780258] [2023-02-17 22:17:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:21,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658780258] [2023-02-17 22:17:21,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658780258] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:21,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:21,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:21,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099798017] [2023-02-17 22:17:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:21,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:21,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:21,160 INFO L87 Difference]: Start difference. First operand 863 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:21,269 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2023-02-17 22:17:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 22:17:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:21,276 INFO L225 Difference]: With dead ends: 1823 [2023-02-17 22:17:21,276 INFO L226 Difference]: Without dead ends: 1428 [2023-02-17 22:17:21,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:21,293 INFO L413 NwaCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:17:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-02-17 22:17:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2023-02-17 22:17:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2023-02-17 22:17:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2023-02-17 22:17:21,332 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2023-02-17 22:17:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:21,332 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2023-02-17 22:17:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2023-02-17 22:17:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 22:17:21,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:21,334 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, 1, 1, 1, 1, 1] [2023-02-17 22:17:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 22:17:21,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2023-02-17 22:17:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:21,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317418892] [2023-02-17 22:17:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317418892] [2023-02-17 22:17:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317418892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:21,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679132282] [2023-02-17 22:17:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:21,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:21,434 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:21,504 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2023-02-17 22:17:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 22:17:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:21,511 INFO L225 Difference]: With dead ends: 1670 [2023-02-17 22:17:21,511 INFO L226 Difference]: Without dead ends: 1538 [2023-02-17 22:17:21,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:21,513 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 837 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:21,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:17:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2023-02-17 22:17:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2023-02-17 22:17:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2023-02-17 22:17:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2023-02-17 22:17:21,568 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2023-02-17 22:17:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:21,569 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2023-02-17 22:17:21,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2023-02-17 22:17:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 22:17:21,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:21,570 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, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:21,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 22:17:21,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2023-02-17 22:17:21,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:21,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684625138] [2023-02-17 22:17:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:21,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:21,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:21,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684625138] [2023-02-17 22:17:21,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684625138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:21,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:21,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:17:21,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21261961] [2023-02-17 22:17:21,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:17:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:17:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:17:21,706 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:22,172 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2023-02-17 22:17:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:17:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 22:17:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:22,180 INFO L225 Difference]: With dead ends: 2654 [2023-02-17 22:17:22,180 INFO L226 Difference]: Without dead ends: 1775 [2023-02-17 22:17:22,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:22,185 INFO L413 NwaCegarLoop]: 1163 mSDtfsCounter, 1415 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:22,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1417 Valid, 1475 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 22:17:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2023-02-17 22:17:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2023-02-17 22:17:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2023-02-17 22:17:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-02-17 22:17:22,241 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2023-02-17 22:17:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:22,242 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-02-17 22:17:22,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-02-17 22:17:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 22:17:22,243 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:22,243 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, 1, 1, 1, 1, 1] [2023-02-17 22:17:22,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 22:17:22,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2023-02-17 22:17:22,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047526610] [2023-02-17 22:17:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:22,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:22,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:22,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047526610] [2023-02-17 22:17:22,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047526610] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:22,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:22,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:22,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233607154] [2023-02-17 22:17:22,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:22,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:22,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:22,323 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:22,390 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2023-02-17 22:17:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 22:17:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:22,397 INFO L225 Difference]: With dead ends: 1468 [2023-02-17 22:17:22,398 INFO L226 Difference]: Without dead ends: 1464 [2023-02-17 22:17:22,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:22,400 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:22,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:17:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2023-02-17 22:17:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2023-02-17 22:17:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2023-02-17 22:17:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2023-02-17 22:17:22,450 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2023-02-17 22:17:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:22,452 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2023-02-17 22:17:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2023-02-17 22:17:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 22:17:22,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:22,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 22:17:22,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2023-02-17 22:17:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:22,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697695113] [2023-02-17 22:17:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:22,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:22,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 22:17:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:22,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697695113] [2023-02-17 22:17:22,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697695113] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:22,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:22,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:17:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765984033] [2023-02-17 22:17:22,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:17:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:17:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:22,581 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 22:17:27,915 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 [] [2023-02-17 22:17:30,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:33,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:35,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:35,693 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2023-02-17 22:17:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:17:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-02-17 22:17:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:35,702 INFO L225 Difference]: With dead ends: 2260 [2023-02-17 22:17:35,702 INFO L226 Difference]: Without dead ends: 1239 [2023-02-17 22:17:35,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:17:35,704 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 798 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 282 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 2437 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 560 Invalid, 2 Unknown, 0 Unchecked, 13.0s Time] [2023-02-17 22:17:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-02-17 22:17:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2023-02-17 22:17:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2023-02-17 22:17:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2023-02-17 22:17:35,742 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2023-02-17 22:17:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:35,742 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2023-02-17 22:17:35,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 22:17:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2023-02-17 22:17:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 22:17:35,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:35,744 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 22:17:35,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2023-02-17 22:17:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:35,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581063008] [2023-02-17 22:17:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581063008] [2023-02-17 22:17:35,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581063008] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:35,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:35,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:17:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760607563] [2023-02-17 22:17:35,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:35,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:17:35,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:17:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:17:35,849 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:36,158 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2023-02-17 22:17:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:17:36,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-17 22:17:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:36,162 INFO L225 Difference]: With dead ends: 1158 [2023-02-17 22:17:36,162 INFO L226 Difference]: Without dead ends: 1114 [2023-02-17 22:17:36,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:36,164 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 916 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:36,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1526 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 22:17:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-02-17 22:17:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2023-02-17 22:17:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2023-02-17 22:17:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2023-02-17 22:17:36,199 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2023-02-17 22:17:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:36,201 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2023-02-17 22:17:36,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2023-02-17 22:17:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 22:17:36,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:36,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:36,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 22:17:36,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2023-02-17 22:17:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071250740] [2023-02-17 22:17:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:36,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071250740] [2023-02-17 22:17:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071250740] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:36,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:36,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:17:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751183783] [2023-02-17 22:17:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:17:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:17:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:17:36,339 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:36,631 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2023-02-17 22:17:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:17:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 22:17:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:36,636 INFO L225 Difference]: With dead ends: 1148 [2023-02-17 22:17:36,636 INFO L226 Difference]: Without dead ends: 1076 [2023-02-17 22:17:36,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:36,638 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 895 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:36,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1525 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 22:17:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-02-17 22:17:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2023-02-17 22:17:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2023-02-17 22:17:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2023-02-17 22:17:36,673 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2023-02-17 22:17:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:36,673 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2023-02-17 22:17:36,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2023-02-17 22:17:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 22:17:36,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:36,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:36,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 22:17:36,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2023-02-17 22:17:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326738986] [2023-02-17 22:17:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:36,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326738986] [2023-02-17 22:17:36,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326738986] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:36,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:36,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:17:36,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392124280] [2023-02-17 22:17:36,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:36,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:17:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:36,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:17:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:17:36,788 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:37,211 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2023-02-17 22:17:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:17:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 22:17:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:37,215 INFO L225 Difference]: With dead ends: 1358 [2023-02-17 22:17:37,215 INFO L226 Difference]: Without dead ends: 1349 [2023-02-17 22:17:37,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:37,216 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1158 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:37,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1801 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 22:17:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-02-17 22:17:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2023-02-17 22:17:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2023-02-17 22:17:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2023-02-17 22:17:37,255 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2023-02-17 22:17:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:37,255 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2023-02-17 22:17:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2023-02-17 22:17:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 22:17:37,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:37,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:37,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 22:17:37,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2023-02-17 22:17:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:37,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514451361] [2023-02-17 22:17:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:37,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514451361] [2023-02-17 22:17:37,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514451361] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:37,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:37,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049264276] [2023-02-17 22:17:37,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:37,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:37,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:37,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:37,310 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:37,359 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2023-02-17 22:17:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 22:17:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:37,364 INFO L225 Difference]: With dead ends: 1192 [2023-02-17 22:17:37,364 INFO L226 Difference]: Without dead ends: 1164 [2023-02-17 22:17:37,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:37,365 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:37,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:17:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-17 22:17:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2023-02-17 22:17:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2023-02-17 22:17:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2023-02-17 22:17:37,411 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2023-02-17 22:17:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:37,411 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2023-02-17 22:17:37,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2023-02-17 22:17:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 22:17:37,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:37,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:37,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 22:17:37,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2023-02-17 22:17:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:37,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408594980] [2023-02-17 22:17:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408594980] [2023-02-17 22:17:37,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408594980] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:37,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:37,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:17:37,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173109360] [2023-02-17 22:17:37,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:17:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:17:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:37,468 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:37,580 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2023-02-17 22:17:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:17:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 22:17:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:37,584 INFO L225 Difference]: With dead ends: 1402 [2023-02-17 22:17:37,584 INFO L226 Difference]: Without dead ends: 1389 [2023-02-17 22:17:37,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:17:37,585 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 353 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:37,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1982 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:17:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-02-17 22:17:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2023-02-17 22:17:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2023-02-17 22:17:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2023-02-17 22:17:37,636 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2023-02-17 22:17:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:37,637 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2023-02-17 22:17:37,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2023-02-17 22:17:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 22:17:37,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:37,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:37,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 22:17:37,638 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2023-02-17 22:17:37,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703272590] [2023-02-17 22:17:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:37,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:37,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-17 22:17:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703272590] [2023-02-17 22:17:37,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703272590] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:37,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:37,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:17:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143239143] [2023-02-17 22:17:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:37,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:17:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:17:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:17:37,762 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 22:17:41,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:43,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:46,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:48,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:48,524 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2023-02-17 22:17:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:17:48,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-02-17 22:17:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:48,529 INFO L225 Difference]: With dead ends: 1761 [2023-02-17 22:17:48,529 INFO L226 Difference]: Without dead ends: 1129 [2023-02-17 22:17:48,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:48,530 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 919 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 126 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:48,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1195 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 375 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2023-02-17 22:17:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2023-02-17 22:17:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2023-02-17 22:17:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2023-02-17 22:17:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2023-02-17 22:17:48,577 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2023-02-17 22:17:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:48,577 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2023-02-17 22:17:48,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 22:17:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2023-02-17 22:17:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 22:17:48,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:48,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 22:17:48,579 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2023-02-17 22:17:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283683349] [2023-02-17 22:17:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:48,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:48,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283683349] [2023-02-17 22:17:48,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283683349] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:48,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:48,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 22:17:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415221575] [2023-02-17 22:17:48,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:17:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:17:48,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:17:48,669 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:17:48,761 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2023-02-17 22:17:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:17:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-17 22:17:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:17:48,766 INFO L225 Difference]: With dead ends: 1082 [2023-02-17 22:17:48,766 INFO L226 Difference]: Without dead ends: 1054 [2023-02-17 22:17:48,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:17:48,767 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:17:48,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:17:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2023-02-17 22:17:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2023-02-17 22:17:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2023-02-17 22:17:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2023-02-17 22:17:48,812 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2023-02-17 22:17:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:17:48,812 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2023-02-17 22:17:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:17:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2023-02-17 22:17:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:17:48,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:17:48,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:17:48,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 22:17:48,814 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:17:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:17:48,814 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2023-02-17 22:17:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:17:48,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020721966] [2023-02-17 22:17:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:17:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:17:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 22:17:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:48,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-17 22:17:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:17:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:17:48,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:17:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020721966] [2023-02-17 22:17:48,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020721966] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:17:48,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:17:48,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:17:48,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144040318] [2023-02-17 22:17:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:17:48,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:17:48,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:17:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:17:48,926 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:17:53,046 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 [] [2023-02-17 22:17:56,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:17:58,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:00,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:01,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:18:01,711 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2023-02-17 22:18:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:18:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-02-17 22:18:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:18:01,717 INFO L225 Difference]: With dead ends: 1720 [2023-02-17 22:18:01,717 INFO L226 Difference]: Without dead ends: 1185 [2023-02-17 22:18:01,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:18:01,720 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 614 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 244 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-02-17 22:18:01,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2259 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2023-02-17 22:18:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2023-02-17 22:18:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2023-02-17 22:18:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2023-02-17 22:18:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2023-02-17 22:18:01,766 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2023-02-17 22:18:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:18:01,766 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2023-02-17 22:18:01,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:18:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2023-02-17 22:18:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:18:01,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:18:01,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:18:01,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 22:18:01,768 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:18:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:18:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2023-02-17 22:18:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:18:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130047702] [2023-02-17 22:18:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:18:01,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:18:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:01,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 22:18:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:01,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 22:18:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:18:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:18:01,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130047702] [2023-02-17 22:18:01,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130047702] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:18:01,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:18:01,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:18:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203849731] [2023-02-17 22:18:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:18:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:18:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:18:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:18:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:18:01,888 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:18:07,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:09,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:11,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:13,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:15,801 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 [] [2023-02-17 22:18:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:18:15,869 INFO L93 Difference]: Finished difference Result 1133 states and 1690 transitions. [2023-02-17 22:18:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:18:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-02-17 22:18:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:18:15,874 INFO L225 Difference]: With dead ends: 1133 [2023-02-17 22:18:15,874 INFO L226 Difference]: Without dead ends: 1105 [2023-02-17 22:18:15,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:18:15,874 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 293 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 240 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-02-17 22:18:15,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2328 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 710 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2023-02-17 22:18:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-02-17 22:18:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1022. [2023-02-17 22:18:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 809 states have (on average 1.4239802224969098) internal successors, (1152), 816 states have internal predecessors, (1152), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2023-02-17 22:18:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1520 transitions. [2023-02-17 22:18:15,933 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1520 transitions. Word has length 49 [2023-02-17 22:18:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:18:15,934 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1520 transitions. [2023-02-17 22:18:15,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:18:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1520 transitions. [2023-02-17 22:18:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:18:15,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:18:15,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:18:15,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 22:18:15,936 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:18:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:18:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894719, now seen corresponding path program 1 times [2023-02-17 22:18:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:18:15,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475710554] [2023-02-17 22:18:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:18:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:18:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:16,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 22:18:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 22:18:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:18:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:18:16,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475710554] [2023-02-17 22:18:16,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475710554] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:18:16,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:18:16,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:18:16,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907688581] [2023-02-17 22:18:16,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:18:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:18:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:18:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:18:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:18:16,041 INFO L87 Difference]: Start difference. First operand 1022 states and 1520 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:18:20,290 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 [] [2023-02-17 22:18:23,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:25,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:27,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:18:27,380 INFO L93 Difference]: Finished difference Result 1104 states and 1653 transitions. [2023-02-17 22:18:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:18:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-17 22:18:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:18:27,385 INFO L225 Difference]: With dead ends: 1104 [2023-02-17 22:18:27,385 INFO L226 Difference]: Without dead ends: 1097 [2023-02-17 22:18:27,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:18:27,385 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 277 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:18:27,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 2321 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 731 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2023-02-17 22:18:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2023-02-17 22:18:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1034. [2023-02-17 22:18:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 821 states have (on average 1.4202192448233861) internal successors, (1166), 828 states have internal predecessors, (1166), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2023-02-17 22:18:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1534 transitions. [2023-02-17 22:18:27,431 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1534 transitions. Word has length 49 [2023-02-17 22:18:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:18:27,431 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1534 transitions. [2023-02-17 22:18:27,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:18:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1534 transitions. [2023-02-17 22:18:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 22:18:27,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:18:27,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:18:27,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 22:18:27,433 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:18:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:18:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash 725085215, now seen corresponding path program 1 times [2023-02-17 22:18:27,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:18:27,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780010967] [2023-02-17 22:18:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:18:27,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:18:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-17 22:18:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:27,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 22:18:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:18:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:18:27,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780010967] [2023-02-17 22:18:27,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780010967] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:18:27,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:18:27,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:18:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734348116] [2023-02-17 22:18:27,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:18:27,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:18:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:18:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:18:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:18:27,532 INFO L87 Difference]: Start difference. First operand 1034 states and 1534 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:18:31,161 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 [] [2023-02-17 22:18:33,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:35,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:36,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:38,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:40,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:18:40,237 INFO L93 Difference]: Finished difference Result 1172 states and 1735 transitions. [2023-02-17 22:18:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:18:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-17 22:18:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:18:40,242 INFO L225 Difference]: With dead ends: 1172 [2023-02-17 22:18:40,242 INFO L226 Difference]: Without dead ends: 1098 [2023-02-17 22:18:40,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:18:40,243 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 913 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 250 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-02-17 22:18:40,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1966 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 648 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2023-02-17 22:18:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2023-02-17 22:18:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1023. [2023-02-17 22:18:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4213759213759214) internal successors, (1157), 821 states have internal predecessors, (1157), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2023-02-17 22:18:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1521 transitions. [2023-02-17 22:18:40,295 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1521 transitions. Word has length 50 [2023-02-17 22:18:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:18:40,296 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1521 transitions. [2023-02-17 22:18:40,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:18:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1521 transitions. [2023-02-17 22:18:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 22:18:40,297 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:18:40,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:18:40,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 22:18:40,297 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:18:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:18:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1407456133, now seen corresponding path program 1 times [2023-02-17 22:18:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:18:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874735461] [2023-02-17 22:18:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:18:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:18:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 22:18:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 22:18:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:18:40,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:18:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874735461] [2023-02-17 22:18:40,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874735461] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:18:40,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:18:40,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 22:18:40,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712143008] [2023-02-17 22:18:40,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:18:40,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 22:18:40,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:18:40,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 22:18:40,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 22:18:40,502 INFO L87 Difference]: Start difference. First operand 1023 states and 1521 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:18:45,813 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 [] [2023-02-17 22:18:48,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:50,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:52,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:54,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:18:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:18:54,153 INFO L93 Difference]: Finished difference Result 1093 states and 1636 transitions. [2023-02-17 22:18:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 22:18:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-02-17 22:18:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:18:54,160 INFO L225 Difference]: With dead ends: 1093 [2023-02-17 22:18:54,160 INFO L226 Difference]: Without dead ends: 1088 [2023-02-17 22:18:54,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:18:54,161 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1122 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 269 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-02-17 22:18:54,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2784 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1124 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2023-02-17 22:18:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2023-02-17 22:18:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1023. [2023-02-17 22:18:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4201474201474202) internal successors, (1156), 821 states have internal predecessors, (1156), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2023-02-17 22:18:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1520 transitions. [2023-02-17 22:18:54,255 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1520 transitions. Word has length 50 [2023-02-17 22:18:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:18:54,256 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1520 transitions. [2023-02-17 22:18:54,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:18:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1520 transitions. [2023-02-17 22:18:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 22:18:54,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:18:54,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:18:54,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 22:18:54,257 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:18:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:18:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1394050817, now seen corresponding path program 1 times [2023-02-17 22:18:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:18:54,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145820896] [2023-02-17 22:18:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:18:54,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:18:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:54,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 22:18:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 22:18:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:18:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:18:54,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:18:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145820896] [2023-02-17 22:18:54,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145820896] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:18:54,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:18:54,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 22:18:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785775216] [2023-02-17 22:18:54,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:18:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 22:18:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:18:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 22:18:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:18:54,432 INFO L87 Difference]: Start difference. First operand 1023 states and 1520 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:19:01,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:03,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:06,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:08,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:10,491 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 [] [2023-02-17 22:19:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:19:10,553 INFO L93 Difference]: Finished difference Result 1075 states and 1608 transitions. [2023-02-17 22:19:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 22:19:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-02-17 22:19:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:19:10,558 INFO L225 Difference]: With dead ends: 1075 [2023-02-17 22:19:10,558 INFO L226 Difference]: Without dead ends: 1060 [2023-02-17 22:19:10,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:19:10,559 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 91 mSDsluCounter, 5269 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 102 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6055 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:19:10,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6055 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1629 Invalid, 5 Unknown, 0 Unchecked, 16.0s Time] [2023-02-17 22:19:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-17 22:19:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1021. [2023-02-17 22:19:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 813 states have (on average 1.4194341943419435) internal successors, (1154), 820 states have internal predecessors, (1154), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2023-02-17 22:19:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1516 transitions. [2023-02-17 22:19:10,612 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1516 transitions. Word has length 53 [2023-02-17 22:19:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:19:10,613 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1516 transitions. [2023-02-17 22:19:10,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:19:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1516 transitions. [2023-02-17 22:19:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 22:19:10,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:19:10,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:19:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 22:19:10,615 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:19:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:19:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1869145587, now seen corresponding path program 1 times [2023-02-17 22:19:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:19:10,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487708499] [2023-02-17 22:19:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:10,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:19:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:10,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-17 22:19:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:10,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 22:19:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:19:10,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:19:10,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487708499] [2023-02-17 22:19:10,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487708499] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:19:10,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:19:10,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 22:19:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576418560] [2023-02-17 22:19:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:19:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 22:19:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:19:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 22:19:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:19:10,776 INFO L87 Difference]: Start difference. First operand 1021 states and 1516 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:19:18,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:20,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:22,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:23,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:19:25,032 INFO L93 Difference]: Finished difference Result 1072 states and 1603 transitions. [2023-02-17 22:19:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 22:19:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-17 22:19:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:19:25,038 INFO L225 Difference]: With dead ends: 1072 [2023-02-17 22:19:25,038 INFO L226 Difference]: Without dead ends: 1057 [2023-02-17 22:19:25,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:19:25,039 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 91 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6004 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:19:25,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6004 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1621 Invalid, 1 Unknown, 0 Unchecked, 14.2s Time] [2023-02-17 22:19:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-02-17 22:19:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1018. [2023-02-17 22:19:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 811 states have (on average 1.4192355117139335) internal successors, (1151), 818 states have internal predecessors, (1151), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2023-02-17 22:19:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1511 transitions. [2023-02-17 22:19:25,090 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1511 transitions. Word has length 51 [2023-02-17 22:19:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:19:25,090 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1511 transitions. [2023-02-17 22:19:25,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:19:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1511 transitions. [2023-02-17 22:19:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 22:19:25,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:19:25,092 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:19:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 22:19:25,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:19:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:19:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash -956966013, now seen corresponding path program 1 times [2023-02-17 22:19:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:19:25,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209067619] [2023-02-17 22:19:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:19:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:25,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 22:19:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:25,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 22:19:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:19:25,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:19:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209067619] [2023-02-17 22:19:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209067619] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:19:25,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:19:25,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:19:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762373169] [2023-02-17 22:19:25,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:19:25,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:19:25,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:19:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:19:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:19:25,222 INFO L87 Difference]: Start difference. First operand 1018 states and 1511 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:19:27,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:29,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:33,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:35,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:37,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:19:37,594 INFO L93 Difference]: Finished difference Result 2099 states and 3135 transitions. [2023-02-17 22:19:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:19:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-17 22:19:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:19:37,599 INFO L225 Difference]: With dead ends: 2099 [2023-02-17 22:19:37,600 INFO L226 Difference]: Without dead ends: 1085 [2023-02-17 22:19:37,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:19:37,602 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 248 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 221 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:19:37,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 2339 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 703 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2023-02-17 22:19:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2023-02-17 22:19:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1021. [2023-02-17 22:19:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 814 states have (on average 1.4176904176904177) internal successors, (1154), 821 states have internal predecessors, (1154), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2023-02-17 22:19:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1514 transitions. [2023-02-17 22:19:37,654 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1514 transitions. Word has length 51 [2023-02-17 22:19:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:19:37,654 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1514 transitions. [2023-02-17 22:19:37,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:19:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1514 transitions. [2023-02-17 22:19:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 22:19:37,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:19:37,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:19:37,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 22:19:37,656 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:19:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:19:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2088131427, now seen corresponding path program 1 times [2023-02-17 22:19:37,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:19:37,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359713533] [2023-02-17 22:19:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:19:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:37,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 22:19:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:37,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 22:19:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 22:19:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:19:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359713533] [2023-02-17 22:19:37,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359713533] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:19:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509800343] [2023-02-17 22:19:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:37,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:19:37,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:19:37,827 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) [2023-02-17 22:19:37,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 22:19:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 22:19:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:19:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 22:19:38,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:19:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 22:19:38,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509800343] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:19:38,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:19:38,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-17 22:19:38,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517468813] [2023-02-17 22:19:38,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:19:38,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 22:19:38,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:19:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 22:19:38,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:19:38,238 INFO L87 Difference]: Start difference. First operand 1021 states and 1514 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:19:43,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:46,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:48,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:50,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:19:52,197 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 [] [2023-02-17 22:19:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:19:52,261 INFO L93 Difference]: Finished difference Result 2116 states and 3157 transitions. [2023-02-17 22:19:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:19:52,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-02-17 22:19:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:19:52,266 INFO L225 Difference]: With dead ends: 2116 [2023-02-17 22:19:52,266 INFO L226 Difference]: Without dead ends: 1100 [2023-02-17 22:19:52,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:19:52,269 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 264 mSDsluCounter, 3660 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 237 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-02-17 22:19:52,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 4412 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1209 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2023-02-17 22:19:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-02-17 22:19:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1035. [2023-02-17 22:19:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 828 states have (on average 1.4106280193236715) internal successors, (1168), 835 states have internal predecessors, (1168), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2023-02-17 22:19:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1528 transitions. [2023-02-17 22:19:52,328 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1528 transitions. Word has length 57 [2023-02-17 22:19:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:19:52,329 INFO L495 AbstractCegarLoop]: Abstraction has 1035 states and 1528 transitions. [2023-02-17 22:19:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:19:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1528 transitions. [2023-02-17 22:19:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 22:19:52,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:19:52,330 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:19:52,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 22:19:52,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-17 22:19:52,539 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:19:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:19:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1053556911, now seen corresponding path program 2 times [2023-02-17 22:19:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:19:52,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082859946] [2023-02-17 22:19:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:19:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:52,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 22:19:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:52,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-17 22:19:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 22:19:52,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:19:52,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082859946] [2023-02-17 22:19:52,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082859946] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:19:52,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660354204] [2023-02-17 22:19:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:19:52,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:19:52,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:19:52,773 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) [2023-02-17 22:19:52,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 22:19:53,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 22:19:53,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:19:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 22:19:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:19:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 22:19:53,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:19:53,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660354204] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:19:53,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:19:53,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-17 22:19:53,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753966188] [2023-02-17 22:19:53,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:19:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:19:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:19:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:19:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:19:53,146 INFO L87 Difference]: Start difference. First operand 1035 states and 1528 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:19:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:19:53,244 INFO L93 Difference]: Finished difference Result 1793 states and 2708 transitions. [2023-02-17 22:19:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:19:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2023-02-17 22:19:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:19:53,258 INFO L225 Difference]: With dead ends: 1793 [2023-02-17 22:19:53,258 INFO L226 Difference]: Without dead ends: 1044 [2023-02-17 22:19:53,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:19:53,260 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 2 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:19:53,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2508 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:19:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-02-17 22:19:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1044. [2023-02-17 22:19:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 835 states have (on average 1.4095808383233532) internal successors, (1177), 844 states have internal predecessors, (1177), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2023-02-17 22:19:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1539 transitions. [2023-02-17 22:19:53,317 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1539 transitions. Word has length 71 [2023-02-17 22:19:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:19:53,318 INFO L495 AbstractCegarLoop]: Abstraction has 1044 states and 1539 transitions. [2023-02-17 22:19:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:19:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1539 transitions. [2023-02-17 22:19:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 22:19:53,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:19:53,321 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:19:53,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 22:19:53,528 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,SelfDestructingSolverStorable23 [2023-02-17 22:19:53,528 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:19:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:19:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1654004804, now seen corresponding path program 1 times [2023-02-17 22:19:53,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:19:53,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193916549] [2023-02-17 22:19:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:53,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:19:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:53,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 22:19:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-17 22:19:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 22:19:53,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:19:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193916549] [2023-02-17 22:19:53,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193916549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:19:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913131263] [2023-02-17 22:19:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:19:53,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:19:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:19:53,725 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) [2023-02-17 22:19:53,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 22:19:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:19:54,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 22:19:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:19:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 22:19:54,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:19:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 22:19:54,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913131263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:19:54,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:19:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-02-17 22:19:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533894432] [2023-02-17 22:19:54,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:19:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 22:19:54,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:19:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 22:19:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:19:54,295 INFO L87 Difference]: Start difference. First operand 1044 states and 1539 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:19:57,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:02,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:05,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:07,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:10,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:10,661 INFO L93 Difference]: Finished difference Result 2149 states and 3175 transitions. [2023-02-17 22:20:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 22:20:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-02-17 22:20:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:10,666 INFO L225 Difference]: With dead ends: 2149 [2023-02-17 22:20:10,666 INFO L226 Difference]: Without dead ends: 1116 [2023-02-17 22:20:10,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-17 22:20:10,669 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 300 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 255 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 5793 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:10,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 5793 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1677 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2023-02-17 22:20:10,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-02-17 22:20:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1064. [2023-02-17 22:20:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 855 states have (on average 1.4) internal successors, (1197), 864 states have internal predecessors, (1197), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2023-02-17 22:20:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1559 transitions. [2023-02-17 22:20:10,750 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1559 transitions. Word has length 72 [2023-02-17 22:20:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:10,750 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1559 transitions. [2023-02-17 22:20:10,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:20:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1559 transitions. [2023-02-17 22:20:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 22:20:10,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:10,753 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 22:20:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:10,961 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 351198032, now seen corresponding path program 2 times [2023-02-17 22:20:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:10,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727362525] [2023-02-17 22:20:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:11,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-02-17 22:20:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:11,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-17 22:20:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-17 22:20:11,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727362525] [2023-02-17 22:20:11,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727362525] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:20:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647647397] [2023-02-17 22:20:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:20:11,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:11,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:20:11,246 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) [2023-02-17 22:20:11,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 22:20:11,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 22:20:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:20:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 22:20:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:20:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-17 22:20:11,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:20:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-17 22:20:11,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647647397] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:20:11,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:20:11,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2023-02-17 22:20:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994896814] [2023-02-17 22:20:11,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:20:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 22:20:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 22:20:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-02-17 22:20:11,995 INFO L87 Difference]: Start difference. First operand 1064 states and 1559 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:20:19,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:21,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:22,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:25,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:26,348 INFO L93 Difference]: Finished difference Result 2185 states and 3210 transitions. [2023-02-17 22:20:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 22:20:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2023-02-17 22:20:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:26,353 INFO L225 Difference]: With dead ends: 2185 [2023-02-17 22:20:26,353 INFO L226 Difference]: Without dead ends: 1134 [2023-02-17 22:20:26,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:20:26,355 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 344 mSDsluCounter, 5044 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 308 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 5796 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:26,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 5796 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1784 Invalid, 1 Unknown, 0 Unchecked, 14.1s Time] [2023-02-17 22:20:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2023-02-17 22:20:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1084. [2023-02-17 22:20:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 875 states have (on average 1.3908571428571428) internal successors, (1217), 884 states have internal predecessors, (1217), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2023-02-17 22:20:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1579 transitions. [2023-02-17 22:20:26,437 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1579 transitions. Word has length 92 [2023-02-17 22:20:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:26,437 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 1579 transitions. [2023-02-17 22:20:26,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:20:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1579 transitions. [2023-02-17 22:20:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 22:20:26,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:26,441 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:26,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 22:20:26,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 22:20:26,650 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1476489628, now seen corresponding path program 3 times [2023-02-17 22:20:26,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:26,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693551104] [2023-02-17 22:20:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-17 22:20:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:27,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-02-17 22:20:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-17 22:20:27,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693551104] [2023-02-17 22:20:27,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693551104] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:20:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70896291] [2023-02-17 22:20:27,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 22:20:27,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:20:27,153 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) [2023-02-17 22:20:27,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 22:20:27,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 22:20:27,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:20:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 22:20:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:20:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-02-17 22:20:27,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:20:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-02-17 22:20:27,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70896291] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:20:27,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:20:27,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-02-17 22:20:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329586817] [2023-02-17 22:20:27,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:20:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 22:20:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 22:20:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:20:27,941 INFO L87 Difference]: Start difference. First operand 1084 states and 1579 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 22:20:35,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:37,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:38,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:41,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:43,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:43,879 INFO L93 Difference]: Finished difference Result 2239 states and 3299 transitions. [2023-02-17 22:20:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 22:20:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2023-02-17 22:20:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:43,882 INFO L225 Difference]: With dead ends: 2239 [2023-02-17 22:20:43,882 INFO L226 Difference]: Without dead ends: 1176 [2023-02-17 22:20:43,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 22:20:43,885 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 310 mSDsluCounter, 5036 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 317 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 5775 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:43,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 5775 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2815 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2023-02-17 22:20:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-02-17 22:20:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1123. [2023-02-17 22:20:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 912 states have (on average 1.388157894736842) internal successors, (1266), 921 states have internal predecessors, (1266), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2023-02-17 22:20:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1630 transitions. [2023-02-17 22:20:43,943 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1630 transitions. Word has length 112 [2023-02-17 22:20:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:43,943 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1630 transitions. [2023-02-17 22:20:43,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 22:20:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1630 transitions. [2023-02-17 22:20:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-17 22:20:43,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:43,945 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:43,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 22:20:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 22:20:44,153 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash -681598516, now seen corresponding path program 1 times [2023-02-17 22:20:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315458272] [2023-02-17 22:20:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-17 22:20:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:44,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 22:20:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-02-17 22:20:44,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315458272] [2023-02-17 22:20:44,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315458272] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:20:44,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:20:44,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 22:20:44,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034594236] [2023-02-17 22:20:44,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:20:44,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 22:20:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 22:20:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:20:44,484 INFO L87 Difference]: Start difference. First operand 1123 states and 1630 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:20:51,833 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 [] [2023-02-17 22:20:53,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:54,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:57,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:20:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:58,555 INFO L93 Difference]: Finished difference Result 1165 states and 1685 transitions. [2023-02-17 22:20:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 22:20:58,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 132 [2023-02-17 22:20:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:58,559 INFO L225 Difference]: With dead ends: 1165 [2023-02-17 22:20:58,559 INFO L226 Difference]: Without dead ends: 1148 [2023-02-17 22:20:58,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 22:20:58,560 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 102 mSDsluCounter, 6017 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6792 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:58,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6792 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1671 Invalid, 1 Unknown, 0 Unchecked, 14.0s Time] [2023-02-17 22:20:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2023-02-17 22:20:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1120. [2023-02-17 22:20:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 910 states have (on average 1.3879120879120879) internal successors, (1263), 919 states have internal predecessors, (1263), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2023-02-17 22:20:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1625 transitions. [2023-02-17 22:20:58,620 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1625 transitions. Word has length 132 [2023-02-17 22:20:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:58,620 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1625 transitions. [2023-02-17 22:20:58,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:20:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1625 transitions. [2023-02-17 22:20:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-02-17 22:20:58,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:58,627 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-17 22:20:58,627 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2033662210, now seen corresponding path program 1 times [2023-02-17 22:20:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938681849] [2023-02-17 22:20:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:58,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-17 22:20:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:58,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2023-02-17 22:20:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:58,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-17 22:20:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-02-17 22:20:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-02-17 22:20:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:58,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938681849] [2023-02-17 22:20:58,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938681849] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:20:58,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:20:58,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 22:20:58,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817052382] [2023-02-17 22:20:58,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:20:58,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:20:58,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:20:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:20:58,775 INFO L87 Difference]: Start difference. First operand 1120 states and 1625 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:21:03,728 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 [] [2023-02-17 22:21:05,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:07,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:09,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:11,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:21:11,368 INFO L93 Difference]: Finished difference Result 1658 states and 2411 transitions. [2023-02-17 22:21:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 22:21:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 137 [2023-02-17 22:21:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:21:11,372 INFO L225 Difference]: With dead ends: 1658 [2023-02-17 22:21:11,372 INFO L226 Difference]: Without dead ends: 1167 [2023-02-17 22:21:11,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 22:21:11,373 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 470 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 316 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-02-17 22:21:11,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 2858 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 855 Invalid, 2 Unknown, 0 Unchecked, 12.5s Time] [2023-02-17 22:21:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2023-02-17 22:21:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1122. [2023-02-17 22:21:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 912 states have (on average 1.3837719298245614) internal successors, (1262), 921 states have internal predecessors, (1262), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (213), 149 states have call predecessors, (213), 145 states have call successors, (213) [2023-02-17 22:21:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1625 transitions. [2023-02-17 22:21:11,468 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1625 transitions. Word has length 137 [2023-02-17 22:21:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:21:11,468 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1625 transitions. [2023-02-17 22:21:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 22:21:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1625 transitions. [2023-02-17 22:21:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-17 22:21:11,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:21:11,470 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:21:11,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-17 22:21:11,470 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:21:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:21:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash 237996309, now seen corresponding path program 4 times [2023-02-17 22:21:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:21:11,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299149690] [2023-02-17 22:21:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:21:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:21:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-02-17 22:21:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-02-17 22:21:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-02-17 22:21:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:21:12,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299149690] [2023-02-17 22:21:12,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299149690] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:21:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593934152] [2023-02-17 22:21:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 22:21:12,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:21:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:21:12,032 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) [2023-02-17 22:21:12,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 22:21:12,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 22:21:12,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:21:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 22:21:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:21:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-02-17 22:21:13,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:21:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-02-17 22:21:13,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593934152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:21:13,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:21:13,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 8] total 30 [2023-02-17 22:21:13,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627261458] [2023-02-17 22:21:13,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:21:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 22:21:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:21:13,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 22:21:13,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-02-17 22:21:13,198 INFO L87 Difference]: Start difference. First operand 1122 states and 1625 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 22:21:23,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:25,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:27,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:30,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:32,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:34,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:21:34,443 INFO L93 Difference]: Finished difference Result 2334 states and 3438 transitions. [2023-02-17 22:21:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 22:21:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 133 [2023-02-17 22:21:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:21:34,446 INFO L225 Difference]: With dead ends: 2334 [2023-02-17 22:21:34,447 INFO L226 Difference]: Without dead ends: 1219 [2023-02-17 22:21:34,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 242 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 22:21:34,449 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 326 mSDsluCounter, 9791 mSDsCounter, 0 mSdLazyCounter, 4633 mSolverCounterSat, 354 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 10526 SdHoareTripleChecker+Invalid, 4991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 4633 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2023-02-17 22:21:34,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 10526 Invalid, 4991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 4633 Invalid, 4 Unknown, 0 Unchecked, 20.7s Time] [2023-02-17 22:21:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-02-17 22:21:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1155. [2023-02-17 22:21:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 945 states have (on average 1.3873015873015873) internal successors, (1311), 954 states have internal predecessors, (1311), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2023-02-17 22:21:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1672 transitions. [2023-02-17 22:21:34,593 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1672 transitions. Word has length 133 [2023-02-17 22:21:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:21:34,593 INFO L495 AbstractCegarLoop]: Abstraction has 1155 states and 1672 transitions. [2023-02-17 22:21:34,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 22:21:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1672 transitions. [2023-02-17 22:21:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-17 22:21:34,596 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:21:34,596 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:21:34,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 22:21:34,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:21:34,807 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:21:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:21:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1320885179, now seen corresponding path program 1 times [2023-02-17 22:21:34,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:21:34,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065748990] [2023-02-17 22:21:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:21:34,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:21:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:35,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-17 22:21:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:35,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 22:21:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-17 22:21:35,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:21:35,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065748990] [2023-02-17 22:21:35,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065748990] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:21:35,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:21:35,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 22:21:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452813729] [2023-02-17 22:21:35,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:21:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 22:21:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:21:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 22:21:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:21:35,229 INFO L87 Difference]: Start difference. First operand 1155 states and 1672 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:21:38,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:41,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:43,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:45,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:46,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:49,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:51,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:21:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:21:51,772 INFO L93 Difference]: Finished difference Result 1197 states and 1727 transitions. [2023-02-17 22:21:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 22:21:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 140 [2023-02-17 22:21:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:21:51,781 INFO L225 Difference]: With dead ends: 1197 [2023-02-17 22:21:51,781 INFO L226 Difference]: Without dead ends: 1180 [2023-02-17 22:21:51,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-17 22:21:51,782 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 114 mSDsluCounter, 6682 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 7453 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-02-17 22:21:51,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 7453 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1821 Invalid, 2 Unknown, 0 Unchecked, 16.4s Time] [2023-02-17 22:21:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2023-02-17 22:21:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1152. [2023-02-17 22:21:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 943 states have (on average 1.3870625662778366) internal successors, (1308), 952 states have internal predecessors, (1308), 149 states have call successors, (149), 51 states have call predecessors, (149), 59 states have return successors, (210), 148 states have call predecessors, (210), 144 states have call successors, (210) [2023-02-17 22:21:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1667 transitions. [2023-02-17 22:21:51,850 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1667 transitions. Word has length 140 [2023-02-17 22:21:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:21:51,850 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1667 transitions. [2023-02-17 22:21:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:21:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1667 transitions. [2023-02-17 22:21:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-17 22:21:51,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:21:51,852 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:21:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-17 22:21:51,853 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:21:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:21:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1511993716, now seen corresponding path program 1 times [2023-02-17 22:21:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:21:51,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603202790] [2023-02-17 22:21:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:21:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:21:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-02-17 22:21:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:52,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 22:21:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:21:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-17 22:21:52,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:21:52,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603202790] [2023-02-17 22:21:52,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603202790] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:21:52,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:21:52,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 22:21:52,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454825096] [2023-02-17 22:21:52,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:21:52,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 22:21:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:21:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 22:21:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:21:52,215 INFO L87 Difference]: Start difference. First operand 1152 states and 1667 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:21:59,068 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 [] [2023-02-17 22:22:01,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:03,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:06,478 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 [] [2023-02-17 22:22:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:22:08,013 INFO L93 Difference]: Finished difference Result 1194 states and 1722 transitions. [2023-02-17 22:22:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 22:22:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 139 [2023-02-17 22:22:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:22:08,016 INFO L225 Difference]: With dead ends: 1194 [2023-02-17 22:22:08,016 INFO L226 Difference]: Without dead ends: 1177 [2023-02-17 22:22:08,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-17 22:22:08,017 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 114 mSDsluCounter, 6583 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 97 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 7338 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-17 22:22:08,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 7338 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1805 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2023-02-17 22:22:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2023-02-17 22:22:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1149. [2023-02-17 22:22:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 941 states have (on average 1.3868225292242295) internal successors, (1305), 950 states have internal predecessors, (1305), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2023-02-17 22:22:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1662 transitions. [2023-02-17 22:22:08,084 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1662 transitions. Word has length 139 [2023-02-17 22:22:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:22:08,084 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1662 transitions. [2023-02-17 22:22:08,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 22:22:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1662 transitions. [2023-02-17 22:22:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-17 22:22:08,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:22:08,086 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:22:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-17 22:22:08,087 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:22:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:22:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 327267077, now seen corresponding path program 1 times [2023-02-17 22:22:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:22:08,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698830121] [2023-02-17 22:22:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:22:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:22:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:08,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-17 22:22:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-02-17 22:22:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-17 22:22:08,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:22:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698830121] [2023-02-17 22:22:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698830121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:22:08,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:22:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 22:22:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336147116] [2023-02-17 22:22:08,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:22:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:22:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:22:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:22:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:22:08,299 INFO L87 Difference]: Start difference. First operand 1149 states and 1662 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:22:12,560 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 [] [2023-02-17 22:22:14,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:16,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:19,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:21,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:22:21,313 INFO L93 Difference]: Finished difference Result 1240 states and 1776 transitions. [2023-02-17 22:22:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:22:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 140 [2023-02-17 22:22:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:22:21,317 INFO L225 Difference]: With dead ends: 1240 [2023-02-17 22:22:21,317 INFO L226 Difference]: Without dead ends: 1206 [2023-02-17 22:22:21,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:22:21,318 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 1096 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 234 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-02-17 22:22:21,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 1810 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 790 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2023-02-17 22:22:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2023-02-17 22:22:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1149. [2023-02-17 22:22:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 941 states have (on average 1.385759829968119) internal successors, (1304), 950 states have internal predecessors, (1304), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2023-02-17 22:22:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1661 transitions. [2023-02-17 22:22:21,388 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1661 transitions. Word has length 140 [2023-02-17 22:22:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:22:21,388 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1661 transitions. [2023-02-17 22:22:21,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 22:22:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1661 transitions. [2023-02-17 22:22:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-02-17 22:22:21,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:22:21,391 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:22:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-17 22:22:21,391 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:22:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:22:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2121187106, now seen corresponding path program 1 times [2023-02-17 22:22:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:22:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984953208] [2023-02-17 22:22:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:22:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:22:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:21,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-02-17 22:22:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:21,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-02-17 22:22:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:21,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-02-17 22:22:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:21,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 22:22:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:21,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-17 22:22:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-17 22:22:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:22:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984953208] [2023-02-17 22:22:21,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984953208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:22:21,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:22:21,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 22:22:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258437102] [2023-02-17 22:22:21,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:22:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 22:22:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:22:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 22:22:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:22:21,682 INFO L87 Difference]: Start difference. First operand 1149 states and 1661 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:22:27,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:29,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:31,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:34,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:37,435 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 [] [2023-02-17 22:22:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:22:37,522 INFO L93 Difference]: Finished difference Result 1752 states and 2521 transitions. [2023-02-17 22:22:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 22:22:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 160 [2023-02-17 22:22:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:22:37,525 INFO L225 Difference]: With dead ends: 1752 [2023-02-17 22:22:37,525 INFO L226 Difference]: Without dead ends: 1173 [2023-02-17 22:22:37,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-02-17 22:22:37,527 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 1423 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 587 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-17 22:22:37,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 3026 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1472 Invalid, 4 Unknown, 0 Unchecked, 15.7s Time] [2023-02-17 22:22:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-02-17 22:22:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1125. [2023-02-17 22:22:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 922 states have (on average 1.383947939262473) internal successors, (1276), 930 states have internal predecessors, (1276), 147 states have call successors, (147), 51 states have call predecessors, (147), 55 states have return successors, (174), 143 states have call predecessors, (174), 142 states have call successors, (174) [2023-02-17 22:22:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1597 transitions. [2023-02-17 22:22:37,601 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1597 transitions. Word has length 160 [2023-02-17 22:22:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:22:37,602 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1597 transitions. [2023-02-17 22:22:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:22:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1597 transitions. [2023-02-17 22:22:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-17 22:22:37,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:22:37,604 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:22:37,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-17 22:22:37,604 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:22:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:22:37,604 INFO L85 PathProgramCache]: Analyzing trace with hash 783452127, now seen corresponding path program 1 times [2023-02-17 22:22:37,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:22:37,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079690345] [2023-02-17 22:22:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:22:37,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:22:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-02-17 22:22:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-02-17 22:22:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 22:22:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:37,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-17 22:22:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:22:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-17 22:22:37,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:22:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079690345] [2023-02-17 22:22:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079690345] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:22:37,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:22:37,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 22:22:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914995397] [2023-02-17 22:22:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:22:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 22:22:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:22:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 22:22:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:22:37,920 INFO L87 Difference]: Start difference. First operand 1125 states and 1597 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 22:22:43,392 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 [] [2023-02-17 22:22:45,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:47,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:49,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:51,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:55,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:22:57,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:00,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:01,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:04,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:06,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:08,686 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 [] [2023-02-17 22:23:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:23:08,914 INFO L93 Difference]: Finished difference Result 2312 states and 3339 transitions. [2023-02-17 22:23:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 22:23:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 148 [2023-02-17 22:23:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:23:08,919 INFO L225 Difference]: With dead ends: 2312 [2023-02-17 22:23:08,919 INFO L226 Difference]: Without dead ends: 1882 [2023-02-17 22:23:08,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2023-02-17 22:23:08,920 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 2090 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 550 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2179 SdHoareTripleChecker+Valid, 3910 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2023-02-17 22:23:08,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2179 Valid, 3910 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2256 Invalid, 8 Unknown, 0 Unchecked, 30.8s Time] [2023-02-17 22:23:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2023-02-17 22:23:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1200. [2023-02-17 22:23:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 982 states have (on average 1.374745417515275) internal successors, (1350), 990 states have internal predecessors, (1350), 154 states have call successors, (154), 56 states have call predecessors, (154), 63 states have return successors, (185), 153 states have call predecessors, (185), 149 states have call successors, (185) [2023-02-17 22:23:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1689 transitions. [2023-02-17 22:23:09,035 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1689 transitions. Word has length 148 [2023-02-17 22:23:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:23:09,035 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1689 transitions. [2023-02-17 22:23:09,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 22:23:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1689 transitions. [2023-02-17 22:23:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-17 22:23:09,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:23:09,037 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:23:09,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-17 22:23:09,038 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:23:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:23:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1574942648, now seen corresponding path program 1 times [2023-02-17 22:23:09,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:23:09,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035748150] [2023-02-17 22:23:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:23:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:23:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-02-17 22:23:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-02-17 22:23:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-02-17 22:23:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2023-02-17 22:23:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:23:09,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035748150] [2023-02-17 22:23:09,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035748150] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:23:09,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:23:09,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 22:23:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212817680] [2023-02-17 22:23:09,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:23:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 22:23:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:23:09,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 22:23:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 22:23:09,314 INFO L87 Difference]: Start difference. First operand 1200 states and 1689 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:23:14,634 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 [] [2023-02-17 22:23:16,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:19,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:21,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:26,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:28,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:29,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:32,098 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 [] [2023-02-17 22:23:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:23:32,543 INFO L93 Difference]: Finished difference Result 1407 states and 2003 transitions. [2023-02-17 22:23:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 22:23:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2023-02-17 22:23:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:23:32,547 INFO L225 Difference]: With dead ends: 1407 [2023-02-17 22:23:32,547 INFO L226 Difference]: Without dead ends: 1316 [2023-02-17 22:23:32,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:23:32,548 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 234 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 131 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:23:32,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 3139 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1384 Invalid, 6 Unknown, 0 Unchecked, 23.1s Time] [2023-02-17 22:23:32,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2023-02-17 22:23:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1212. [2023-02-17 22:23:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 991 states have (on average 1.3753784056508578) internal successors, (1363), 1001 states have internal predecessors, (1363), 155 states have call successors, (155), 56 states have call predecessors, (155), 65 states have return successors, (201), 154 states have call predecessors, (201), 150 states have call successors, (201) [2023-02-17 22:23:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1719 transitions. [2023-02-17 22:23:32,647 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1719 transitions. Word has length 145 [2023-02-17 22:23:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:23:32,647 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1719 transitions. [2023-02-17 22:23:32,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:23:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1719 transitions. [2023-02-17 22:23:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-17 22:23:32,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:23:32,650 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:23:32,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-17 22:23:32,652 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:23:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:23:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash -796796614, now seen corresponding path program 1 times [2023-02-17 22:23:32,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:23:32,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789920396] [2023-02-17 22:23:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:23:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:23:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-02-17 22:23:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-02-17 22:23:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:33,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-02-17 22:23:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2023-02-17 22:23:33,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:23:33,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789920396] [2023-02-17 22:23:33,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789920396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:23:33,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519114385] [2023-02-17 22:23:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:23:33,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:23:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:23:33,286 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) [2023-02-17 22:23:33,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 22:23:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 22:23:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:23:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-02-17 22:23:34,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:23:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-17 22:23:34,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519114385] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:23:34,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:23:34,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 9] total 34 [2023-02-17 22:23:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112255670] [2023-02-17 22:23:34,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:23:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 22:23:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:23:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 22:23:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 22:23:34,631 INFO L87 Difference]: Start difference. First operand 1212 states and 1719 transitions. Second operand has 34 states, 34 states have (on average 4.294117647058823) internal successors, (146), 31 states have internal predecessors, (146), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 22:23:43,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:45,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:49,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:52,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 22:23:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:23:52,868 INFO L93 Difference]: Finished difference Result 2625 states and 3755 transitions. [2023-02-17 22:23:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 22:23:52,870 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.294117647058823) internal successors, (146), 31 states have internal predecessors, (146), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-02-17 22:23:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:23:52,872 INFO L225 Difference]: With dead ends: 2625 [2023-02-17 22:23:52,872 INFO L226 Difference]: Without dead ends: 1432 [2023-02-17 22:23:52,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 267 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=529, Invalid=2893, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 22:23:52,875 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 378 mSDsluCounter, 8185 mSDsCounter, 0 mSdLazyCounter, 4762 mSolverCounterSat, 295 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 8899 SdHoareTripleChecker+Invalid, 5058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 4762 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:23:52,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 8899 Invalid, 5058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 4762 Invalid, 1 Unknown, 0 Unchecked, 17.3s Time] [2023-02-17 22:23:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-02-17 22:23:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1332. [2023-02-17 22:23:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1106 states have (on average 1.395117540687161) internal successors, (1543), 1114 states have internal predecessors, (1543), 155 states have call successors, (155), 63 states have call predecessors, (155), 70 states have return successors, (201), 154 states have call predecessors, (201), 150 states have call successors, (201) [2023-02-17 22:23:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1899 transitions. [2023-02-17 22:23:53,034 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1899 transitions. Word has length 145 [2023-02-17 22:23:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:23:53,034 INFO L495 AbstractCegarLoop]: Abstraction has 1332 states and 1899 transitions. [2023-02-17 22:23:53,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.294117647058823) internal successors, (146), 31 states have internal predecessors, (146), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 22:23:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1899 transitions. [2023-02-17 22:23:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-17 22:23:53,036 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:23:53,036 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:23:53,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 22:23:53,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:23:53,268 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:23:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:23:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1489447977, now seen corresponding path program 5 times [2023-02-17 22:23:53,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:23:53,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365982045] [2023-02-17 22:23:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:23:53,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:23:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:53,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-17 22:23:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:53,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-02-17 22:23:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:23:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-17 22:23:53,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:23:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365982045] [2023-02-17 22:23:53,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365982045] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:23:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224130793] [2023-02-17 22:23:53,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 22:23:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:23:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:23:53,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:23:53,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process