./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 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-7e1ff0e [2023-02-14 22:35:47,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:35:47,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:35:47,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:35:47,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:35:47,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:35:47,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:35:47,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:35:47,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:35:47,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:35:47,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:35:47,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:35:47,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:35:47,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:35:47,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:35:47,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:35:47,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:35:47,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:35:47,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:35:47,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:35:47,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:35:47,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:35:47,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:35:47,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:35:47,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:35:47,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:35:47,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:35:47,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:35:47,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:35:47,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:35:47,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:35:47,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:35:47,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:35:47,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:35:47,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:35:47,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:35:47,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:35:47,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:35:47,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:35:47,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:35:47,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:35:47,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:35:47,833 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:35:47,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:35:47,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:35:47,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:35:47,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:35:47,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:35:47,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:35:47,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:35:47,835 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:35:47,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:35:47,836 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:35:47,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:35:47,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:35:47,838 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:35:47,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:35:47,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:35:47,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:35:47,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:35:47,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:35:47,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:35:47,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:35:47,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:35:47,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:35:47,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:35:47,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:35:47,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:35:47,840 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:35:47,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:35:47,840 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:35:47,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2023-02-14 22:35:48,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:35:48,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:35:48,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:35:48,024 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:35:48,024 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:35:48,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-14 22:35:49,029 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:35:49,376 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:35:49,376 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-14 22:35:49,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa377f26e/7de69ef86e6b4ce29ce31ac3599cd436/FLAG00fa90639 [2023-02-14 22:35:49,415 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa377f26e/7de69ef86e6b4ce29ce31ac3599cd436 [2023-02-14 22:35:49,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:35:49,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:35:49,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:35:49,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:35:49,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:35:49,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:35:49" (1/1) ... [2023-02-14 22:35:49,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad73662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:49, skipping insertion in model container [2023-02-14 22:35:49,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:35:49" (1/1) ... [2023-02-14 22:35:49,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:35:49,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:35:50,109 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] [2023-02-14 22:35:50,211 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,213 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,214 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,220 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,225 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,227 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,228 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,229 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,230 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,230 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,231 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,232 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,239 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,240 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:35:50,579 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:35:50,639 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] [2023-02-14 22:35:50,651 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,652 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,652 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,655 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,657 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,657 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,662 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,663 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,664 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,664 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,665 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,667 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,669 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,669 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-14 22:35:50,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:35:50,872 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:35:50,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50 WrapperNode [2023-02-14 22:35:50,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:35:50,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:35:50,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:35:50,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:35:50,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:50,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,005 INFO L138 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2023-02-14 22:35:51,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:35:51,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:35:51,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:35:51,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:35:51,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:35:51,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:35:51,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:35:51,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:35:51,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (1/1) ... [2023-02-14 22:35:51,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:35:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:35:51,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:35:51,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:35:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-14 22:35:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-14 22:35:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-14 22:35:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:35:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-14 22:35:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-14 22:35:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-14 22:35:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-14 22:35:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2023-02-14 22:35:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2023-02-14 22:35:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:35:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2023-02-14 22:35:51,192 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2023-02-14 22:35:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2023-02-14 22:35:51,192 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2023-02-14 22:35:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-14 22:35:51,192 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-14 22:35:51,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-14 22:35:51,193 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-14 22:35:51,193 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2023-02-14 22:35:51,193 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2023-02-14 22:35:51,193 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-14 22:35:51,193 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-14 22:35:51,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:35:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2023-02-14 22:35:51,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2023-02-14 22:35:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2023-02-14 22:35:51,194 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2023-02-14 22:35:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:35:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 22:35:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 22:35:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-14 22:35:51,194 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2023-02-14 22:35:51,195 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2023-02-14 22:35:51,195 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-14 22:35:51,195 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-14 22:35:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2023-02-14 22:35:51,196 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2023-02-14 22:35:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:35:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2023-02-14 22:35:51,196 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2023-02-14 22:35:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-14 22:35:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-14 22:35:51,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-14 22:35:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:35:51,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:35:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2023-02-14 22:35:51,197 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2023-02-14 22:35:51,574 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:35:51,576 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:35:51,700 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:51,711 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-14 22:35:51,712 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-14 22:35:52,071 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:52,093 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2023-02-14 22:35:52,093 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2023-02-14 22:35:52,107 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:52,107 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:52,108 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:52,113 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:52,117 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:35:52,122 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:01,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2023-02-14 22:36:01,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2023-02-14 22:36:01,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2023-02-14 22:36:01,814 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:01,817 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-14 22:36:01,817 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-14 22:36:01,831 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:36:01,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:36:01,837 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-14 22:36:01,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:36:01 BoogieIcfgContainer [2023-02-14 22:36:01,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:36:01,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:36:01,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:36:01,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:36:01,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:35:49" (1/3) ... [2023-02-14 22:36:01,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691c0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:36:01, skipping insertion in model container [2023-02-14 22:36:01,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:35:50" (2/3) ... [2023-02-14 22:36:01,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691c0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:36:01, skipping insertion in model container [2023-02-14 22:36:01,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:36:01" (3/3) ... [2023-02-14 22:36:01,844 INFO L112 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2023-02-14 22:36:01,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:36:01,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:36:01,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:36:01,894 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;@7999e725, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:36:01,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:36:01,901 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) [2023-02-14 22:36:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 22:36:01,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:01,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:01,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2023-02-14 22:36:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:01,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527738550] [2023-02-14 22:36:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527738550] [2023-02-14 22:36:02,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527738550] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:02,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:02,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878899127] [2023-02-14 22:36:02,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:02,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:02,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:02,294 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) [2023-02-14 22:36:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:02,444 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2023-02-14 22:36:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:02,446 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 [2023-02-14 22:36:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:02,457 INFO L225 Difference]: With dead ends: 1237 [2023-02-14 22:36:02,457 INFO L226 Difference]: Without dead ends: 610 [2023-02-14 22:36:02,464 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 [2023-02-14 22:36:02,466 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:02,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:36:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-02-14 22:36:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2023-02-14 22:36:02,578 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) [2023-02-14 22:36:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2023-02-14 22:36:02,589 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2023-02-14 22:36:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:02,589 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2023-02-14 22:36:02,589 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) [2023-02-14 22:36:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2023-02-14 22:36:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 22:36:02,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:02,590 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] [2023-02-14 22:36:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 22:36:02,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2023-02-14 22:36:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746940518] [2023-02-14 22:36:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:02,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746940518] [2023-02-14 22:36:02,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746940518] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:02,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:02,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084438908] [2023-02-14 22:36:02,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:02,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:02,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:02,664 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) [2023-02-14 22:36:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:02,834 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2023-02-14 22:36:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:02,834 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 [2023-02-14 22:36:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:02,843 INFO L225 Difference]: With dead ends: 1123 [2023-02-14 22:36:02,843 INFO L226 Difference]: Without dead ends: 882 [2023-02-14 22:36:02,849 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 [2023-02-14 22:36:02,852 INFO L413 NwaCegarLoop]: 1253 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, 1667 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 [2023-02-14 22:36:02,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1667 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:36:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-02-14 22:36:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2023-02-14 22:36:02,904 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) [2023-02-14 22:36:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2023-02-14 22:36:02,911 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2023-02-14 22:36:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:02,912 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2023-02-14 22:36:02,912 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) [2023-02-14 22:36:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2023-02-14 22:36:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:36:02,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:02,917 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] [2023-02-14 22:36:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 22:36:02,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2023-02-14 22:36:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:02,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995081492] [2023-02-14 22:36:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:02,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:03,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995081492] [2023-02-14 22:36:03,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995081492] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:03,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:03,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:03,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710029320] [2023-02-14 22:36:03,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:03,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:03,025 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) [2023-02-14 22:36:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:03,137 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2023-02-14 22:36:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:03,137 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 [2023-02-14 22:36:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:03,143 INFO L225 Difference]: With dead ends: 1823 [2023-02-14 22:36:03,143 INFO L226 Difference]: Without dead ends: 1428 [2023-02-14 22:36:03,144 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 [2023-02-14 22:36:03,144 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 [2023-02-14 22:36:03,145 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] [2023-02-14 22:36:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-02-14 22:36:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2023-02-14 22:36:03,175 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) [2023-02-14 22:36:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2023-02-14 22:36:03,178 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2023-02-14 22:36:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:03,179 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2023-02-14 22:36:03,179 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) [2023-02-14 22:36:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2023-02-14 22:36:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:36:03,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:03,180 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] [2023-02-14 22:36:03,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 22:36:03,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:03,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2023-02-14 22:36:03,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:03,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411157674] [2023-02-14 22:36:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:03,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:03,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:03,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411157674] [2023-02-14 22:36:03,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411157674] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:03,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:03,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:03,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668080535] [2023-02-14 22:36:03,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:03,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:03,306 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) [2023-02-14 22:36:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:03,347 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2023-02-14 22:36:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:03,348 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 [2023-02-14 22:36:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:03,353 INFO L225 Difference]: With dead ends: 1670 [2023-02-14 22:36:03,353 INFO L226 Difference]: Without dead ends: 1538 [2023-02-14 22:36:03,354 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 [2023-02-14 22:36:03,355 INFO L413 NwaCegarLoop]: 1132 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, 1530 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 [2023-02-14 22:36:03,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1530 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:36:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2023-02-14 22:36:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2023-02-14 22:36:03,396 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) [2023-02-14 22:36:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2023-02-14 22:36:03,400 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2023-02-14 22:36:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:03,401 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2023-02-14 22:36:03,401 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) [2023-02-14 22:36:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2023-02-14 22:36:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 22:36:03,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:03,402 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] [2023-02-14 22:36:03,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 22:36:03,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2023-02-14 22:36:03,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:03,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281898778] [2023-02-14 22:36:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:03,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:03,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281898778] [2023-02-14 22:36:03,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281898778] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:03,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:03,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:36:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511735794] [2023-02-14 22:36:03,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:03,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:36:03,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:36:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:36:03,525 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) [2023-02-14 22:36:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:03,984 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2023-02-14 22:36:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:36:03,984 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 [2023-02-14 22:36:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:03,990 INFO L225 Difference]: With dead ends: 2654 [2023-02-14 22:36:03,990 INFO L226 Difference]: Without dead ends: 1775 [2023-02-14 22:36:03,992 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 [2023-02-14 22:36:03,993 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 1422 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:03,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 1468 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 22:36:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2023-02-14 22:36:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2023-02-14 22:36:04,043 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) [2023-02-14 22:36:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-02-14 22:36:04,048 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2023-02-14 22:36:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:04,048 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-02-14 22:36:04,048 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) [2023-02-14 22:36:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-02-14 22:36:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:36:04,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:04,049 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] [2023-02-14 22:36:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 22:36:04,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2023-02-14 22:36:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808081214] [2023-02-14 22:36:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808081214] [2023-02-14 22:36:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808081214] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:04,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983097263] [2023-02-14 22:36:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:04,106 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) [2023-02-14 22:36:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:04,239 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2023-02-14 22:36:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:04,239 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 [2023-02-14 22:36:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:04,244 INFO L225 Difference]: With dead ends: 1468 [2023-02-14 22:36:04,244 INFO L226 Difference]: Without dead ends: 1464 [2023-02-14 22:36:04,245 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 [2023-02-14 22:36:04,246 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:04,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:36:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2023-02-14 22:36:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2023-02-14 22:36:04,305 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) [2023-02-14 22:36:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2023-02-14 22:36:04,309 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2023-02-14 22:36:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:04,310 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2023-02-14 22:36:04,310 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) [2023-02-14 22:36:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2023-02-14 22:36:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 22:36:04,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:04,311 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] [2023-02-14 22:36:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 22:36:04,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2023-02-14 22:36:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475445621] [2023-02-14 22:36:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:36:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:04,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475445621] [2023-02-14 22:36:04,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475445621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:04,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:04,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:04,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071853950] [2023-02-14 22:36:04,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:04,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:04,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:04,433 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) [2023-02-14 22:36:11,286 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 [] [2023-02-14 22:36:13,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:14,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:16,793 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2023-02-14 22:36:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:36:16,795 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 [2023-02-14 22:36:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:16,799 INFO L225 Difference]: With dead ends: 2260 [2023-02-14 22:36:16,799 INFO L226 Difference]: Without dead ends: 1239 [2023-02-14 22:36:16,801 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 [2023-02-14 22:36:16,801 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 798 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 282 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s 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, 12.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:16,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 2437 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 560 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2023-02-14 22:36:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-02-14 22:36:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2023-02-14 22:36:16,841 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) [2023-02-14 22:36:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2023-02-14 22:36:16,844 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2023-02-14 22:36:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:16,847 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2023-02-14 22:36:16,847 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) [2023-02-14 22:36:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2023-02-14 22:36:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 22:36:16,848 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:16,848 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] [2023-02-14 22:36:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 22:36:16,849 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2023-02-14 22:36:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:16,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693303897] [2023-02-14 22:36:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:16,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693303897] [2023-02-14 22:36:16,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693303897] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:16,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:16,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:36:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635653605] [2023-02-14 22:36:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:36:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:36:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:36:16,968 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) [2023-02-14 22:36:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:17,277 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2023-02-14 22:36:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:36:17,277 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 [2023-02-14 22:36:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:17,281 INFO L225 Difference]: With dead ends: 1158 [2023-02-14 22:36:17,281 INFO L226 Difference]: Without dead ends: 1114 [2023-02-14 22:36:17,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:17,282 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 [2023-02-14 22:36:17,283 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] [2023-02-14 22:36:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-02-14 22:36:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2023-02-14 22:36:17,321 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) [2023-02-14 22:36:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2023-02-14 22:36:17,324 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2023-02-14 22:36:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:17,324 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2023-02-14 22:36:17,324 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) [2023-02-14 22:36:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2023-02-14 22:36:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 22:36:17,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:17,327 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] [2023-02-14 22:36:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 22:36:17,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:17,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2023-02-14 22:36:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:17,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505570068] [2023-02-14 22:36:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:17,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:17,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505570068] [2023-02-14 22:36:17,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505570068] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:17,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:17,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:36:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329921050] [2023-02-14 22:36:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:17,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:36:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:17,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:36:17,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:36:17,439 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) [2023-02-14 22:36:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:17,686 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2023-02-14 22:36:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:36:17,687 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 [2023-02-14 22:36:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:17,691 INFO L225 Difference]: With dead ends: 1148 [2023-02-14 22:36:17,691 INFO L226 Difference]: Without dead ends: 1076 [2023-02-14 22:36:17,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:17,693 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 [2023-02-14 22:36:17,694 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] [2023-02-14 22:36:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-02-14 22:36:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2023-02-14 22:36:17,763 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) [2023-02-14 22:36:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2023-02-14 22:36:17,766 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2023-02-14 22:36:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:17,766 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2023-02-14 22:36:17,766 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) [2023-02-14 22:36:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2023-02-14 22:36:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 22:36:17,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:17,768 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] [2023-02-14 22:36:17,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 22:36:17,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2023-02-14 22:36:17,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867332230] [2023-02-14 22:36:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:17,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:17,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867332230] [2023-02-14 22:36:17,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867332230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:17,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:17,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:36:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572761459] [2023-02-14 22:36:17,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:17,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:36:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:36:17,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:36:17,913 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) [2023-02-14 22:36:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:18,308 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2023-02-14 22:36:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:36:18,308 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 [2023-02-14 22:36:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:18,312 INFO L225 Difference]: With dead ends: 1358 [2023-02-14 22:36:18,312 INFO L226 Difference]: Without dead ends: 1349 [2023-02-14 22:36:18,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:18,313 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:18,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1801 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:36:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-02-14 22:36:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2023-02-14 22:36:18,352 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) [2023-02-14 22:36:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2023-02-14 22:36:18,387 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2023-02-14 22:36:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:18,387 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2023-02-14 22:36:18,388 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) [2023-02-14 22:36:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2023-02-14 22:36:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 22:36:18,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:18,389 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] [2023-02-14 22:36:18,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-14 22:36:18,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2023-02-14 22:36:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:18,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913774050] [2023-02-14 22:36:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:18,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913774050] [2023-02-14 22:36:18,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913774050] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:18,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:18,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:18,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688910358] [2023-02-14 22:36:18,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:18,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:18,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:18,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:18,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:18,443 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) [2023-02-14 22:36:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:18,494 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2023-02-14 22:36:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:18,494 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 [2023-02-14 22:36:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:18,498 INFO L225 Difference]: With dead ends: 1192 [2023-02-14 22:36:18,498 INFO L226 Difference]: Without dead ends: 1164 [2023-02-14 22:36:18,499 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 [2023-02-14 22:36:18,499 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 [2023-02-14 22:36:18,499 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] [2023-02-14 22:36:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-14 22:36:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2023-02-14 22:36:18,547 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) [2023-02-14 22:36:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2023-02-14 22:36:18,550 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2023-02-14 22:36:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:18,550 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2023-02-14 22:36:18,551 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) [2023-02-14 22:36:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2023-02-14 22:36:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 22:36:18,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:18,552 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] [2023-02-14 22:36:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 22:36:18,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2023-02-14 22:36:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438382319] [2023-02-14 22:36:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:18,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:18,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438382319] [2023-02-14 22:36:18,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438382319] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:18,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:18,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:36:18,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596505297] [2023-02-14 22:36:18,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:18,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:36:18,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:18,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:36:18,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:36:18,603 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) [2023-02-14 22:36:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:18,719 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2023-02-14 22:36:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:36:18,719 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 [2023-02-14 22:36:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:18,724 INFO L225 Difference]: With dead ends: 1402 [2023-02-14 22:36:18,724 INFO L226 Difference]: Without dead ends: 1389 [2023-02-14 22:36:18,724 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 [2023-02-14 22:36:18,725 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 [2023-02-14 22:36:18,725 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] [2023-02-14 22:36:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-02-14 22:36:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2023-02-14 22:36:18,782 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) [2023-02-14 22:36:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2023-02-14 22:36:18,784 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2023-02-14 22:36:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:18,785 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2023-02-14 22:36:18,785 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) [2023-02-14 22:36:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2023-02-14 22:36:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 22:36:18,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:18,786 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] [2023-02-14 22:36:18,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-14 22:36:18,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2023-02-14 22:36:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:18,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665326576] [2023-02-14 22:36:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:18,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:18,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 22:36:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665326576] [2023-02-14 22:36:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665326576] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:18,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:18,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:36:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633538963] [2023-02-14 22:36:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:36:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:36:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:36:18,869 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) [2023-02-14 22:36:23,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:25,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:27,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:29,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:31,987 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 [] [2023-02-14 22:36:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:32,055 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2023-02-14 22:36:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:36:32,056 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 [2023-02-14 22:36:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:32,060 INFO L225 Difference]: With dead ends: 1761 [2023-02-14 22:36:32,060 INFO L226 Difference]: Without dead ends: 1129 [2023-02-14 22:36:32,061 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 [2023-02-14 22:36:32,062 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 919 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 126 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:32,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1195 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 373 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2023-02-14 22:36:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2023-02-14 22:36:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2023-02-14 22:36:32,106 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) [2023-02-14 22:36:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2023-02-14 22:36:32,109 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2023-02-14 22:36:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:32,109 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2023-02-14 22:36:32,109 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) [2023-02-14 22:36:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2023-02-14 22:36:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 22:36:32,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:32,110 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] [2023-02-14 22:36:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-14 22:36:32,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2023-02-14 22:36:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627828707] [2023-02-14 22:36:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:32,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627828707] [2023-02-14 22:36:32,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627828707] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:32,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:32,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:36:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773022095] [2023-02-14 22:36:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:36:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:36:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:36:32,198 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) [2023-02-14 22:36:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:32,293 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2023-02-14 22:36:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:36:32,293 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 [2023-02-14 22:36:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:32,297 INFO L225 Difference]: With dead ends: 1082 [2023-02-14 22:36:32,297 INFO L226 Difference]: Without dead ends: 1054 [2023-02-14 22:36:32,297 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 [2023-02-14 22:36:32,298 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 [2023-02-14 22:36:32,298 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] [2023-02-14 22:36:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2023-02-14 22:36:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2023-02-14 22:36:32,375 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) [2023-02-14 22:36:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2023-02-14 22:36:32,377 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2023-02-14 22:36:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:32,378 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2023-02-14 22:36:32,378 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) [2023-02-14 22:36:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2023-02-14 22:36:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:36:32,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:32,379 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] [2023-02-14 22:36:32,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-14 22:36:32,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2023-02-14 22:36:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:32,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019598689] [2023-02-14 22:36:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:32,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:36:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:32,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 22:36:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:32,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:32,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019598689] [2023-02-14 22:36:32,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019598689] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:32,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:32,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:32,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165196717] [2023-02-14 22:36:32,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:32,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:32,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:32,461 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) [2023-02-14 22:36:36,371 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 [] [2023-02-14 22:36:38,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:40,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:43,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:45,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:45,416 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2023-02-14 22:36:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:36:45,418 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 [2023-02-14 22:36:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:45,422 INFO L225 Difference]: With dead ends: 1720 [2023-02-14 22:36:45,422 INFO L226 Difference]: Without dead ends: 1185 [2023-02-14 22:36:45,423 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 [2023-02-14 22:36:45,424 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 614 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 244 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:45,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2259 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 696 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2023-02-14 22:36:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2023-02-14 22:36:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2023-02-14 22:36:45,537 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) [2023-02-14 22:36:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2023-02-14 22:36:45,539 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2023-02-14 22:36:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:45,540 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2023-02-14 22:36:45,540 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) [2023-02-14 22:36:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2023-02-14 22:36:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:36:45,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:45,541 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] [2023-02-14 22:36:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-14 22:36:45,542 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2023-02-14 22:36:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908035648] [2023-02-14 22:36:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:45,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 22:36:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:45,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 22:36:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:45,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:45,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908035648] [2023-02-14 22:36:45,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908035648] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:45,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:45,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113558140] [2023-02-14 22:36:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:45,635 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) [2023-02-14 22:36:50,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:52,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:55,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:57,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:59,348 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 [] [2023-02-14 22:36:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:59,403 INFO L93 Difference]: Finished difference Result 1133 states and 1690 transitions. [2023-02-14 22:36:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:36:59,404 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 [2023-02-14 22:36:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:59,408 INFO L225 Difference]: With dead ends: 1133 [2023-02-14 22:36:59,408 INFO L226 Difference]: Without dead ends: 1105 [2023-02-14 22:36:59,408 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 [2023-02-14 22:36:59,409 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 293 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 240 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s 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, 13.7s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:59,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2328 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 710 Invalid, 4 Unknown, 0 Unchecked, 13.7s Time] [2023-02-14 22:36:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-02-14 22:36:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1022. [2023-02-14 22:36:59,501 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) [2023-02-14 22:36:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1520 transitions. [2023-02-14 22:36:59,503 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1520 transitions. Word has length 49 [2023-02-14 22:36:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:59,503 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1520 transitions. [2023-02-14 22:36:59,503 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) [2023-02-14 22:36:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1520 transitions. [2023-02-14 22:36:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:36:59,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:59,505 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] [2023-02-14 22:36:59,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 22:36:59,505 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894719, now seen corresponding path program 1 times [2023-02-14 22:36:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084815480] [2023-02-14 22:36:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:59,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:59,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 22:36:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:59,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 22:36:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:59,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:59,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084815480] [2023-02-14 22:36:59,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084815480] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:59,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:59,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:59,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831003545] [2023-02-14 22:36:59,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:59,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:59,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:59,631 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) [2023-02-14 22:37:04,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:07,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:09,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:11,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:13,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:15,048 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 [] [2023-02-14 22:37:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:15,146 INFO L93 Difference]: Finished difference Result 1104 states and 1653 transitions. [2023-02-14 22:37:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:37:15,148 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 [2023-02-14 22:37:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:15,152 INFO L225 Difference]: With dead ends: 1104 [2023-02-14 22:37:15,152 INFO L226 Difference]: Without dead ends: 1097 [2023-02-14 22:37:15,153 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 [2023-02-14 22:37:15,153 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 277 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 228 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:15,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 2321 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 728 Invalid, 4 Unknown, 0 Unchecked, 15.4s Time] [2023-02-14 22:37:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2023-02-14 22:37:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1034. [2023-02-14 22:37:15,273 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) [2023-02-14 22:37:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1534 transitions. [2023-02-14 22:37:15,275 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1534 transitions. Word has length 49 [2023-02-14 22:37:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:15,276 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1534 transitions. [2023-02-14 22:37:15,276 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) [2023-02-14 22:37:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1534 transitions. [2023-02-14 22:37:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:37:15,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:15,277 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] [2023-02-14 22:37:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-14 22:37:15,278 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash 725085215, now seen corresponding path program 1 times [2023-02-14 22:37:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:15,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128664193] [2023-02-14 22:37:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:15,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 22:37:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 22:37:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128664193] [2023-02-14 22:37:15,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128664193] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:15,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:15,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:37:15,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871674940] [2023-02-14 22:37:15,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:15,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:37:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:37:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:37:15,347 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) [2023-02-14 22:37:19,614 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 [] [2023-02-14 22:37:22,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:23,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:25,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:27,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:29,460 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 [] [2023-02-14 22:37:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:29,505 INFO L93 Difference]: Finished difference Result 1172 states and 1735 transitions. [2023-02-14 22:37:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:37:29,506 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 [2023-02-14 22:37:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:29,510 INFO L225 Difference]: With dead ends: 1172 [2023-02-14 22:37:29,511 INFO L226 Difference]: Without dead ends: 1098 [2023-02-14 22:37:29,511 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 [2023-02-14 22:37:29,511 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 913 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 250 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s 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, 14.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:29,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1966 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 648 Invalid, 2 Unknown, 0 Unchecked, 14.1s Time] [2023-02-14 22:37:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2023-02-14 22:37:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1023. [2023-02-14 22:37:29,602 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) [2023-02-14 22:37:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1521 transitions. [2023-02-14 22:37:29,606 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1521 transitions. Word has length 50 [2023-02-14 22:37:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:29,606 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1521 transitions. [2023-02-14 22:37:29,607 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) [2023-02-14 22:37:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1521 transitions. [2023-02-14 22:37:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:37:29,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:29,610 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] [2023-02-14 22:37:29,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-14 22:37:29,611 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:29,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1407456133, now seen corresponding path program 1 times [2023-02-14 22:37:29,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:29,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229394659] [2023-02-14 22:37:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:29,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:29,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 22:37:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:29,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 22:37:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:29,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229394659] [2023-02-14 22:37:29,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229394659] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:29,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:29,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:37:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724700215] [2023-02-14 22:37:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:29,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:37:29,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:37:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:37:29,745 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) [2023-02-14 22:37:34,600 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 [] [2023-02-14 22:37:37,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:39,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:42,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:43,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:44,028 INFO L93 Difference]: Finished difference Result 1093 states and 1636 transitions. [2023-02-14 22:37:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:37:44,030 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 [2023-02-14 22:37:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:44,033 INFO L225 Difference]: With dead ends: 1093 [2023-02-14 22:37:44,033 INFO L226 Difference]: Without dead ends: 1088 [2023-02-14 22:37:44,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:37:44,034 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1122 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 269 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:44,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2784 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1125 Invalid, 2 Unknown, 0 Unchecked, 14.1s Time] [2023-02-14 22:37:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2023-02-14 22:37:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1023. [2023-02-14 22:37:44,102 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) [2023-02-14 22:37:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1520 transitions. [2023-02-14 22:37:44,104 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1520 transitions. Word has length 50 [2023-02-14 22:37:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:44,105 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1520 transitions. [2023-02-14 22:37:44,105 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) [2023-02-14 22:37:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1520 transitions. [2023-02-14 22:37:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 22:37:44,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:44,106 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] [2023-02-14 22:37:44,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-14 22:37:44,107 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:44,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1394050817, now seen corresponding path program 1 times [2023-02-14 22:37:44,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:44,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099787807] [2023-02-14 22:37:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:44,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:44,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:37:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:44,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:37:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099787807] [2023-02-14 22:37:44,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099787807] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:44,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:44,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 22:37:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118441964] [2023-02-14 22:37:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:44,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:37:44,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:37:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:37:44,303 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) [2023-02-14 22:37:46,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:52,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:54,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:56,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:58,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:00,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:02,671 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 [] [2023-02-14 22:38:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:02,740 INFO L93 Difference]: Finished difference Result 1075 states and 1608 transitions. [2023-02-14 22:38:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:38:02,741 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 [2023-02-14 22:38:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:02,745 INFO L225 Difference]: With dead ends: 1075 [2023-02-14 22:38:02,745 INFO L226 Difference]: Without dead ends: 1060 [2023-02-14 22:38:02,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:38:02,746 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 91 mSDsluCounter, 5269 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 102 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s 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, 18.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:02,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6055 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1629 Invalid, 5 Unknown, 0 Unchecked, 18.3s Time] [2023-02-14 22:38:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-14 22:38:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1021. [2023-02-14 22:38:02,799 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) [2023-02-14 22:38:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1516 transitions. [2023-02-14 22:38:02,800 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1516 transitions. Word has length 53 [2023-02-14 22:38:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:02,801 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1516 transitions. [2023-02-14 22:38:02,801 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) [2023-02-14 22:38:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1516 transitions. [2023-02-14 22:38:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 22:38:02,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:02,803 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] [2023-02-14 22:38:02,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-14 22:38:02,803 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1869145587, now seen corresponding path program 1 times [2023-02-14 22:38:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:02,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347517702] [2023-02-14 22:38:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:02,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 22:38:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:02,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:38:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:03,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347517702] [2023-02-14 22:38:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347517702] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:03,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:03,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 22:38:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440127676] [2023-02-14 22:38:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:38:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:38:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:38:03,006 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) [2023-02-14 22:38:10,735 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 [] [2023-02-14 22:38:13,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:15,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:17,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:18,250 INFO L93 Difference]: Finished difference Result 1072 states and 1603 transitions. [2023-02-14 22:38:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:38:18,252 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 [2023-02-14 22:38:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:18,255 INFO L225 Difference]: With dead ends: 1072 [2023-02-14 22:38:18,255 INFO L226 Difference]: Without dead ends: 1057 [2023-02-14 22:38:18,256 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 [2023-02-14 22:38:18,257 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 91 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 101 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6004 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:18,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6004 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1619 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2023-02-14 22:38:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-02-14 22:38:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1018. [2023-02-14 22:38:18,332 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) [2023-02-14 22:38:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1511 transitions. [2023-02-14 22:38:18,334 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1511 transitions. Word has length 51 [2023-02-14 22:38:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:18,334 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1511 transitions. [2023-02-14 22:38:18,335 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) [2023-02-14 22:38:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1511 transitions. [2023-02-14 22:38:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 22:38:18,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:18,341 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] [2023-02-14 22:38:18,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-14 22:38:18,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash -956966013, now seen corresponding path program 1 times [2023-02-14 22:38:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:18,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266902804] [2023-02-14 22:38:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:18,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 22:38:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:18,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 22:38:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:18,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:18,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266902804] [2023-02-14 22:38:18,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266902804] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:18,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:18,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:38:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272863970] [2023-02-14 22:38:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:18,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:38:18,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:38:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:38:18,475 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) [2023-02-14 22:38:23,218 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 [] [2023-02-14 22:38:25,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:27,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:28,544 INFO L93 Difference]: Finished difference Result 2099 states and 3135 transitions. [2023-02-14 22:38:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:38:28,547 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 [2023-02-14 22:38:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:28,551 INFO L225 Difference]: With dead ends: 2099 [2023-02-14 22:38:28,551 INFO L226 Difference]: Without dead ends: 1085 [2023-02-14 22:38:28,553 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 [2023-02-14 22:38:28,553 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 248 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:28,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 2339 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 704 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2023-02-14 22:38:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2023-02-14 22:38:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1021. [2023-02-14 22:38:28,629 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) [2023-02-14 22:38:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1514 transitions. [2023-02-14 22:38:28,631 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1514 transitions. Word has length 51 [2023-02-14 22:38:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:28,632 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1514 transitions. [2023-02-14 22:38:28,632 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) [2023-02-14 22:38:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1514 transitions. [2023-02-14 22:38:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 22:38:28,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:28,633 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] [2023-02-14 22:38:28,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 22:38:28,634 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2088131427, now seen corresponding path program 1 times [2023-02-14 22:38:28,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:28,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454258473] [2023-02-14 22:38:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:28,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:28,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 22:38:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:28,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 22:38:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:38:28,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454258473] [2023-02-14 22:38:28,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454258473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:38:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054174722] [2023-02-14 22:38:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:28,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:38:28,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:38:28,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:38:28,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:38:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:38:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:38:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:38:29,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:38:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:38:29,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054174722] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:38:29,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:38:29,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-14 22:38:29,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043421962] [2023-02-14 22:38:29,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:38:29,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:38:29,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:38:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:38:29,166 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) [2023-02-14 22:38:32,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:37,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:39,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:41,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:43,252 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 [] [2023-02-14 22:38:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:43,968 INFO L93 Difference]: Finished difference Result 2116 states and 3157 transitions. [2023-02-14 22:38:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:38:43,970 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 [2023-02-14 22:38:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:43,974 INFO L225 Difference]: With dead ends: 2116 [2023-02-14 22:38:43,974 INFO L226 Difference]: Without dead ends: 1100 [2023-02-14 22:38:43,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:38:43,976 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 264 mSDsluCounter, 3660 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 237 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:43,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 4412 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1210 Invalid, 3 Unknown, 0 Unchecked, 14.6s Time] [2023-02-14 22:38:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-02-14 22:38:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1035. [2023-02-14 22:38:44,030 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) [2023-02-14 22:38:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1528 transitions. [2023-02-14 22:38:44,032 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1528 transitions. Word has length 57 [2023-02-14 22:38:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:44,033 INFO L495 AbstractCegarLoop]: Abstraction has 1035 states and 1528 transitions. [2023-02-14 22:38:44,033 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) [2023-02-14 22:38:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1528 transitions. [2023-02-14 22:38:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 22:38:44,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:44,035 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] [2023-02-14 22:38:44,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 22:38:44,242 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 [2023-02-14 22:38:44,243 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1053556911, now seen corresponding path program 2 times [2023-02-14 22:38:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:44,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265662] [2023-02-14 22:38:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:44,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 22:38:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:44,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-14 22:38:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 22:38:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265662] [2023-02-14 22:38:44,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:38:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672859032] [2023-02-14 22:38:44,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:38:44,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:38:44,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:38:44,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:38:44,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:38:44,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-14 22:38:44,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:38:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 22:38:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:38:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 22:38:44,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:38:44,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672859032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:44,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:38:44,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-14 22:38:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500597100] [2023-02-14 22:38:44,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:44,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:38:44,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:38:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:38:44,926 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) [2023-02-14 22:38:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:45,020 INFO L93 Difference]: Finished difference Result 1793 states and 2708 transitions. [2023-02-14 22:38:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:38:45,021 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 [2023-02-14 22:38:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:45,023 INFO L225 Difference]: With dead ends: 1793 [2023-02-14 22:38:45,024 INFO L226 Difference]: Without dead ends: 1044 [2023-02-14 22:38:45,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:38:45,026 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 [2023-02-14 22:38:45,026 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] [2023-02-14 22:38:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-02-14 22:38:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1044. [2023-02-14 22:38:45,081 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) [2023-02-14 22:38:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1539 transitions. [2023-02-14 22:38:45,083 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1539 transitions. Word has length 71 [2023-02-14 22:38:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:45,083 INFO L495 AbstractCegarLoop]: Abstraction has 1044 states and 1539 transitions. [2023-02-14 22:38:45,084 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) [2023-02-14 22:38:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1539 transitions. [2023-02-14 22:38:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 22:38:45,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:45,086 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] [2023-02-14 22:38:45,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:38:45,293 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 [2023-02-14 22:38:45,293 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1654004804, now seen corresponding path program 1 times [2023-02-14 22:38:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961115511] [2023-02-14 22:38:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 22:38:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-14 22:38:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 22:38:45,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961115511] [2023-02-14 22:38:45,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961115511] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:38:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249256969] [2023-02-14 22:38:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:45,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:38:45,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:38:45,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:38:45,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:38:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 22:38:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:38:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 22:38:45,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:38:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 22:38:46,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249256969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:38:46,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:38:46,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-14 22:38:46,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958233379] [2023-02-14 22:38:46,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:38:46,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:38:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:46,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:38:46,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:38:46,034 INFO L87 Difference]: Start difference. First operand 1044 states and 1539 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 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) [2023-02-14 22:38:49,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:53,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:55,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:57,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:59,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:02,442 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 [] [2023-02-14 22:39:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:02,490 INFO L93 Difference]: Finished difference Result 2153 states and 3181 transitions. [2023-02-14 22:39:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:39:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 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 [2023-02-14 22:39:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:02,494 INFO L225 Difference]: With dead ends: 2153 [2023-02-14 22:39:02,494 INFO L226 Difference]: Without dead ends: 1120 [2023-02-14 22:39:02,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:39:02,496 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 275 mSDsluCounter, 3662 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 250 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 4415 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:02,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 4415 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1321 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2023-02-14 22:39:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2023-02-14 22:39:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1072. [2023-02-14 22:39:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 863 states have (on average 1.3962920046349943) internal successors, (1205), 872 states have internal predecessors, (1205), 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) [2023-02-14 22:39:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1567 transitions. [2023-02-14 22:39:02,555 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1567 transitions. Word has length 72 [2023-02-14 22:39:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:02,556 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1567 transitions. [2023-02-14 22:39:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 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) [2023-02-14 22:39:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1567 transitions. [2023-02-14 22:39:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 22:39:02,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:02,558 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:02,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:39:02,758 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 [2023-02-14 22:39:02,759 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -306284904, now seen corresponding path program 2 times [2023-02-14 22:39:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172299735] [2023-02-14 22:39:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:03,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-14 22:39:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-14 22:39:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-02-14 22:39:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:03,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172299735] [2023-02-14 22:39:03,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172299735] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:39:03,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991151327] [2023-02-14 22:39:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:39:03,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:39:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:39:03,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:39:03,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:39:03,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:39:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:39:03,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 22:39:03,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:39:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-02-14 22:39:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:39:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-14 22:39:04,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991151327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:39:04,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:39:04,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 5] total 19 [2023-02-14 22:39:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174521090] [2023-02-14 22:39:04,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:39:04,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 22:39:04,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 22:39:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-14 22:39:04,045 INFO L87 Difference]: Start difference. First operand 1072 states and 1567 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 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) [2023-02-14 22:39:07,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:15,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:17,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:19,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:21,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:21,778 INFO L93 Difference]: Finished difference Result 2211 states and 3265 transitions. [2023-02-14 22:39:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 22:39:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 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 100 [2023-02-14 22:39:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:21,782 INFO L225 Difference]: With dead ends: 2211 [2023-02-14 22:39:21,782 INFO L226 Difference]: Without dead ends: 1152 [2023-02-14 22:39:21,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2023-02-14 22:39:21,785 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 287 mSDsluCounter, 7806 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 289 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 8548 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:21,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 8548 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2885 Invalid, 3 Unknown, 0 Unchecked, 17.4s Time] [2023-02-14 22:39:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2023-02-14 22:39:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1099. [2023-02-14 22:39:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 888 states have (on average 1.3986486486486487) internal successors, (1242), 897 states have internal predecessors, (1242), 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) [2023-02-14 22:39:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1606 transitions. [2023-02-14 22:39:21,851 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1606 transitions. Word has length 100 [2023-02-14 22:39:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:21,851 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1606 transitions. [2023-02-14 22:39:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 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) [2023-02-14 22:39:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1606 transitions. [2023-02-14 22:39:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-14 22:39:21,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:21,854 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:21,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 22:39:22,064 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 [2023-02-14 22:39:22,064 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1599609908, now seen corresponding path program 1 times [2023-02-14 22:39:22,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:22,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383760029] [2023-02-14 22:39:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:22,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-14 22:39:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:22,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:39:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-14 22:39:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:22,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383760029] [2023-02-14 22:39:22,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383760029] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:22,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:22,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-14 22:39:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687535718] [2023-02-14 22:39:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:22,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 22:39:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 22:39:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:39:22,383 INFO L87 Difference]: Start difference. First operand 1099 states and 1606 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) [2023-02-14 22:39:29,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:31,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:33,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:35,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:37,913 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 [] [2023-02-14 22:39:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:38,500 INFO L93 Difference]: Finished difference Result 1141 states and 1661 transitions. [2023-02-14 22:39:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:39:38,501 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 108 [2023-02-14 22:39:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:38,504 INFO L225 Difference]: With dead ends: 1141 [2023-02-14 22:39:38,504 INFO L226 Difference]: Without dead ends: 1124 [2023-02-14 22:39:38,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:39:38,504 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 102 mSDsluCounter, 6026 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 100 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6802 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:38,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6802 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1668 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2023-02-14 22:39:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2023-02-14 22:39:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1096. [2023-02-14 22:39:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 886 states have (on average 1.3984198645598194) internal successors, (1239), 895 states have internal predecessors, (1239), 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) [2023-02-14 22:39:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1601 transitions. [2023-02-14 22:39:38,568 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1601 transitions. Word has length 108 [2023-02-14 22:39:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:38,569 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1601 transitions. [2023-02-14 22:39:38,569 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) [2023-02-14 22:39:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1601 transitions. [2023-02-14 22:39:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-14 22:39:38,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:38,571 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-14 22:39:38,571 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash 444894614, now seen corresponding path program 1 times [2023-02-14 22:39:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954572511] [2023-02-14 22:39:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:38,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-14 22:39:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:38,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-02-14 22:39:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:39:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:38,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-02-14 22:39:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-14 22:39:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:38,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954572511] [2023-02-14 22:39:38,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954572511] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:38,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:38,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:39:38,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066389065] [2023-02-14 22:39:38,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:39:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:39:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:39:38,731 INFO L87 Difference]: Start difference. First operand 1096 states and 1601 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) [2023-02-14 22:39:42,381 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 [] [2023-02-14 22:39:43,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:45,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:48,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:50,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:50,849 INFO L93 Difference]: Finished difference Result 1634 states and 2387 transitions. [2023-02-14 22:39:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:39:50,851 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 113 [2023-02-14 22:39:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:50,854 INFO L225 Difference]: With dead ends: 1634 [2023-02-14 22:39:50,854 INFO L226 Difference]: Without dead ends: 1143 [2023-02-14 22:39:50,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:39:50,855 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 470 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 316 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:50,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 2858 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 854 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2023-02-14 22:39:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-02-14 22:39:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1098. [2023-02-14 22:39:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 888 states have (on average 1.3941441441441442) internal successors, (1238), 897 states have internal predecessors, (1238), 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) [2023-02-14 22:39:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1601 transitions. [2023-02-14 22:39:50,945 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1601 transitions. Word has length 113 [2023-02-14 22:39:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:50,945 INFO L495 AbstractCegarLoop]: Abstraction has 1098 states and 1601 transitions. [2023-02-14 22:39:50,945 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) [2023-02-14 22:39:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1601 transitions. [2023-02-14 22:39:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-14 22:39:50,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:50,947 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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] [2023-02-14 22:39:50,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-14 22:39:50,948 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2058986579, now seen corresponding path program 3 times [2023-02-14 22:39:50,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:50,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137991165] [2023-02-14 22:39:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-02-14 22:39:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-02-14 22:39:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-14 22:39:51,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137991165] [2023-02-14 22:39:51,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137991165] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:39:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550799257] [2023-02-14 22:39:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:39:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:39:51,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:39:51,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:39:51,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:39:53,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 22:39:53,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:39:53,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 22:39:53,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:39:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-14 22:39:53,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:39:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-14 22:39:53,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550799257] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:39:53,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:39:53,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2023-02-14 22:39:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445436554] [2023-02-14 22:39:53,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:39:53,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 22:39:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 22:39:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-02-14 22:39:53,758 INFO L87 Difference]: Start difference. First operand 1098 states and 1601 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 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) [2023-02-14 22:40:04,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:05,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:07,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:09,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:10,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:12,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:40:12,853 INFO L93 Difference]: Finished difference Result 2294 states and 3398 transitions. [2023-02-14 22:40:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-14 22:40:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 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 109 [2023-02-14 22:40:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:40:12,857 INFO L225 Difference]: With dead ends: 2294 [2023-02-14 22:40:12,857 INFO L226 Difference]: Without dead ends: 1195 [2023-02-14 22:40:12,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 22:40:12,860 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 306 mSDsluCounter, 10484 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 11219 SdHoareTripleChecker+Invalid, 4377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:40:12,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 11219 Invalid, 4377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 4052 Invalid, 1 Unknown, 0 Unchecked, 18.4s Time] [2023-02-14 22:40:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2023-02-14 22:40:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1131. [2023-02-14 22:40:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 921 states have (on average 1.3973941368078175) internal successors, (1287), 930 states have internal predecessors, (1287), 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) [2023-02-14 22:40:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1648 transitions. [2023-02-14 22:40:12,964 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1648 transitions. Word has length 109 [2023-02-14 22:40:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:40:12,964 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1648 transitions. [2023-02-14 22:40:12,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 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) [2023-02-14 22:40:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1648 transitions. [2023-02-14 22:40:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-14 22:40:12,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:40:12,966 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1] [2023-02-14 22:40:12,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 22:40:13,177 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,SelfDestructingSolverStorable28 [2023-02-14 22:40:13,177 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:40:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:40:13,178 INFO L85 PathProgramCache]: Analyzing trace with hash -207204572, now seen corresponding path program 1 times [2023-02-14 22:40:13,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:40:13,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843298457] [2023-02-14 22:40:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:40:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:40:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:13,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-14 22:40:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:40:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-14 22:40:13,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:40:13,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843298457] [2023-02-14 22:40:13,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843298457] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:40:13,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:40:13,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-14 22:40:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114481335] [2023-02-14 22:40:13,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:40:13,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:40:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:40:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:40:13,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:40:13,555 INFO L87 Difference]: Start difference. First operand 1131 states and 1648 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)