./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 00:24:47,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 00:24:47,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 00:24:47,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 00:24:47,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 00:24:47,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 00:24:47,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 00:24:47,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 00:24:47,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 00:24:47,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 00:24:47,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 00:24:47,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 00:24:47,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 00:24:47,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 00:24:47,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 00:24:47,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 00:24:47,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 00:24:47,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 00:24:47,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 00:24:47,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 00:24:47,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 00:24:47,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 00:24:47,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 00:24:47,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 00:24:47,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 00:24:47,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 00:24:47,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 00:24:47,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 00:24:47,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 00:24:47,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 00:24:47,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 00:24:47,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 00:24:47,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 00:24:47,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 00:24:47,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 00:24:47,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 00:24:47,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 00:24:47,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 00:24:47,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 00:24:47,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 00:24:47,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 00:24:47,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 00:24:47,928 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 00:24:47,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 00:24:47,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 00:24:47,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 00:24:47,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 00:24:47,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 00:24:47,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 00:24:47,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 00:24:47,930 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 00:24:47,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 00:24:47,931 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 00:24:47,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 00:24:47,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 00:24:47,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 00:24:47,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 00:24:47,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 00:24:47,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 00:24:47,932 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 00:24:47,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 00:24:47,932 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 00:24:47,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 00:24:47,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 00:24:47,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 00:24:47,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 00:24:47,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:24:47,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 00:24:47,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 00:24:47,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 00:24:47,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 00:24:47,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 00:24:47,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 00:24:47,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 00:24:47,934 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 00:24:47,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 00:24:47,934 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 00:24:47,934 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2023-02-17 00:24:48,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 00:24:48,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 00:24:48,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 00:24:48,145 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 00:24:48,145 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 00:24:48,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-17 00:24:49,172 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 00:24:49,545 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 00:24:49,545 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-17 00:24:49,581 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23359558/5c4fcbc38a524eef821c4f6b233c1b0b/FLAG963ba634b [2023-02-17 00:24:49,594 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23359558/5c4fcbc38a524eef821c4f6b233c1b0b [2023-02-17 00:24:49,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 00:24:49,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 00:24:49,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 00:24:49,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 00:24:49,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 00:24:49,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:24:49" (1/1) ... [2023-02-17 00:24:49,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ba4299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:49, skipping insertion in model container [2023-02-17 00:24:49,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:24:49" (1/1) ... [2023-02-17 00:24:49,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 00:24:49,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 00:24:50,102 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2023-02-17 00:24:50,174 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,184 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,185 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,188 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,192 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,194 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,196 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,198 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,198 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,199 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,202 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,203 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,207 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,209 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:24:50,530 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 00:24:50,575 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2023-02-17 00:24:50,587 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,588 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,588 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,591 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,593 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,593 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,598 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,599 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,600 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,600 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,600 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,601 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,603 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,603 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-17 00:24:50,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:24:50,807 INFO L208 MainTranslator]: Completed translation [2023-02-17 00:24:50,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50 WrapperNode [2023-02-17 00:24:50,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 00:24:50,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 00:24:50,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 00:24:50,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 00:24:50,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:50,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:50,973 INFO L138 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2023-02-17 00:24:50,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 00:24:50,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 00:24:50,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 00:24:50,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 00:24:50,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:50,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:50,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:50,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:51,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:51,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:51,094 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:51,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:51,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 00:24:51,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 00:24:51,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 00:24:51,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 00:24:51,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (1/1) ... [2023-02-17 00:24:51,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:24:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:24:51,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 00:24:51,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 00:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-17 00:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-17 00:24:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-17 00:24:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 00:24:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-17 00:24:51,173 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-17 00:24:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-17 00:24:51,173 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-17 00:24:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2023-02-17 00:24:51,174 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2023-02-17 00:24:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 00:24:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2023-02-17 00:24:51,174 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2023-02-17 00:24:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2023-02-17 00:24:51,174 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2023-02-17 00:24:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-17 00:24:51,175 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-17 00:24:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-17 00:24:51,175 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-17 00:24:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2023-02-17 00:24:51,175 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2023-02-17 00:24:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-17 00:24:51,175 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-17 00:24:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 00:24:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2023-02-17 00:24:51,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2023-02-17 00:24:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2023-02-17 00:24:51,176 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2023-02-17 00:24:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-17 00:24:51,177 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2023-02-17 00:24:51,177 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2023-02-17 00:24:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2023-02-17 00:24:51,178 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2023-02-17 00:24:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 00:24:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-17 00:24:51,178 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-17 00:24:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2023-02-17 00:24:51,178 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2023-02-17 00:24:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 00:24:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2023-02-17 00:24:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2023-02-17 00:24:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-17 00:24:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-17 00:24:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-17 00:24:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 00:24:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 00:24:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2023-02-17 00:24:51,180 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2023-02-17 00:24:51,545 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 00:24:51,547 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 00:24:51,694 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:51,710 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-17 00:24:51,710 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-17 00:24:52,079 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:52,099 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2023-02-17 00:24:52,099 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2023-02-17 00:24:52,112 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:52,112 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:52,113 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:52,118 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:52,122 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:24:52,126 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:25:01,867 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2023-02-17 00:25:01,867 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2023-02-17 00:25:01,868 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2023-02-17 00:25:01,869 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2023-02-17 00:25:01,869 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2023-02-17 00:25:01,901 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 00:25:01,904 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-17 00:25:01,904 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-17 00:25:01,918 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 00:25:01,941 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 00:25:01,943 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 00:25:01,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:25:01 BoogieIcfgContainer [2023-02-17 00:25:01,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 00:25:01,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 00:25:01,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 00:25:01,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 00:25:01,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 12:24:49" (1/3) ... [2023-02-17 00:25:01,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ba9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:25:01, skipping insertion in model container [2023-02-17 00:25:01,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:24:50" (2/3) ... [2023-02-17 00:25:01,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ba9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:25:01, skipping insertion in model container [2023-02-17 00:25:01,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:25:01" (3/3) ... [2023-02-17 00:25:01,956 INFO L112 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2023-02-17 00:25:01,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 00:25:01,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 00:25:02,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 00:25:02,022 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;@7fcb01ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 00:25:02,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 00:25:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2023-02-17 00:25:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 00:25:02,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:02,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:02,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2023-02-17 00:25:02,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:02,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032856793] [2023-02-17 00:25:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:02,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032856793] [2023-02-17 00:25:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032856793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:02,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515645390] [2023-02-17 00:25:02,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:02,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:02,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:02,359 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:02,555 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2023-02-17 00:25:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:02,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 00:25:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:02,567 INFO L225 Difference]: With dead ends: 1237 [2023-02-17 00:25:02,568 INFO L226 Difference]: Without dead ends: 610 [2023-02-17 00:25:02,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:02,576 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:02,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:25:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-02-17 00:25:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2023-02-17 00:25:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-02-17 00:25:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2023-02-17 00:25:02,648 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2023-02-17 00:25:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:02,648 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2023-02-17 00:25:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2023-02-17 00:25:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 00:25:02,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:02,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 00:25:02,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2023-02-17 00:25:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:02,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595873538] [2023-02-17 00:25:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:02,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595873538] [2023-02-17 00:25:02,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595873538] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:02,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:02,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040759000] [2023-02-17 00:25:02,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:02,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:02,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:02,725 INFO L87 Difference]: Start difference. First operand 610 states and 920 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:02,856 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2023-02-17 00:25:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 00:25:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:02,864 INFO L225 Difference]: With dead ends: 1123 [2023-02-17 00:25:02,864 INFO L226 Difference]: Without dead ends: 882 [2023-02-17 00:25:02,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:02,870 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 [2023-02-17 00:25:02,870 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] [2023-02-17 00:25:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-02-17 00:25:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2023-02-17 00:25:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2023-02-17 00:25:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2023-02-17 00:25:02,924 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2023-02-17 00:25:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:02,924 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2023-02-17 00:25:02,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2023-02-17 00:25:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 00:25:02,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:02,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:02,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 00:25:02,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2023-02-17 00:25:02,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:02,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255700390] [2023-02-17 00:25:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:02,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255700390] [2023-02-17 00:25:03,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255700390] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:03,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:03,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:03,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793225251] [2023-02-17 00:25:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:03,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:03,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:03,062 INFO L87 Difference]: Start difference. First operand 863 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:03,164 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2023-02-17 00:25:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 00:25:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:03,170 INFO L225 Difference]: With dead ends: 1823 [2023-02-17 00:25:03,170 INFO L226 Difference]: Without dead ends: 1428 [2023-02-17 00:25:03,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:03,172 INFO L413 NwaCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:03,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:25:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-02-17 00:25:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2023-02-17 00:25:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2023-02-17 00:25:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2023-02-17 00:25:03,203 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2023-02-17 00:25:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:03,204 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2023-02-17 00:25:03,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2023-02-17 00:25:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 00:25:03,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:03,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:03,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 00:25:03,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2023-02-17 00:25:03,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:03,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912915914] [2023-02-17 00:25:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:03,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:03,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:03,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912915914] [2023-02-17 00:25:03,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912915914] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:03,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:03,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:03,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465720192] [2023-02-17 00:25:03,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:03,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:03,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:03,304 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:03,346 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2023-02-17 00:25:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 00:25:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:03,352 INFO L225 Difference]: With dead ends: 1670 [2023-02-17 00:25:03,352 INFO L226 Difference]: Without dead ends: 1538 [2023-02-17 00:25:03,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:03,353 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 [2023-02-17 00:25:03,354 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] [2023-02-17 00:25:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2023-02-17 00:25:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2023-02-17 00:25:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2023-02-17 00:25:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2023-02-17 00:25:03,397 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2023-02-17 00:25:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:03,397 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2023-02-17 00:25:03,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2023-02-17 00:25:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 00:25:03,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:03,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:03,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 00:25:03,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:03,399 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2023-02-17 00:25:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:03,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671779888] [2023-02-17 00:25:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671779888] [2023-02-17 00:25:03,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671779888] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:03,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:03,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 00:25:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896667517] [2023-02-17 00:25:03,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:25:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:25:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 00:25:03,574 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:04,014 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2023-02-17 00:25:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:25:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 00:25:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:04,021 INFO L225 Difference]: With dead ends: 2654 [2023-02-17 00:25:04,021 INFO L226 Difference]: Without dead ends: 1775 [2023-02-17 00:25:04,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:04,024 INFO L413 NwaCegarLoop]: 1163 mSDtfsCounter, 1415 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:04,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1417 Valid, 1475 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 00:25:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2023-02-17 00:25:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2023-02-17 00:25:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2023-02-17 00:25:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-02-17 00:25:04,077 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2023-02-17 00:25:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:04,077 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-02-17 00:25:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-02-17 00:25:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 00:25:04,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:04,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 00:25:04,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2023-02-17 00:25:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786500783] [2023-02-17 00:25:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:04,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786500783] [2023-02-17 00:25:04,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786500783] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:04,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:04,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490046029] [2023-02-17 00:25:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:04,175 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:04,260 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2023-02-17 00:25:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 00:25:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:04,266 INFO L225 Difference]: With dead ends: 1468 [2023-02-17 00:25:04,266 INFO L226 Difference]: Without dead ends: 1464 [2023-02-17 00:25:04,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:04,267 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:04,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:25:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2023-02-17 00:25:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2023-02-17 00:25:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2023-02-17 00:25:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2023-02-17 00:25:04,358 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2023-02-17 00:25:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:04,360 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2023-02-17 00:25:04,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2023-02-17 00:25:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 00:25:04,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:04,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:04,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 00:25:04,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2023-02-17 00:25:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:04,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139448257] [2023-02-17 00:25:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:04,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:04,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 00:25:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139448257] [2023-02-17 00:25:04,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139448257] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:04,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:04,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:25:04,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490866101] [2023-02-17 00:25:04,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:04,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:25:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:25:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:04,488 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 00:25:08,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:11,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:12,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:13,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:14,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:16,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:16,755 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2023-02-17 00:25:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:25:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-02-17 00:25:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:16,765 INFO L225 Difference]: With dead ends: 2260 [2023-02-17 00:25:16,765 INFO L226 Difference]: Without dead ends: 1239 [2023-02-17 00:25:16,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:25:16,780 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 798 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 282 mSolverCounterUnsat, 3 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, 559 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:16,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 2437 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 559 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-02-17 00:25:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-02-17 00:25:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2023-02-17 00:25:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2023-02-17 00:25:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2023-02-17 00:25:16,870 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2023-02-17 00:25:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:16,870 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2023-02-17 00:25:16,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 00:25:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2023-02-17 00:25:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 00:25:16,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:16,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:16,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 00:25:16,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2023-02-17 00:25:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804887747] [2023-02-17 00:25:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:16,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804887747] [2023-02-17 00:25:16,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804887747] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:16,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:16,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 00:25:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407273974] [2023-02-17 00:25:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:16,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:25:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:25:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 00:25:16,971 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:17,285 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2023-02-17 00:25:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:25:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-17 00:25:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:17,289 INFO L225 Difference]: With dead ends: 1158 [2023-02-17 00:25:17,289 INFO L226 Difference]: Without dead ends: 1114 [2023-02-17 00:25:17,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:17,291 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 916 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:17,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1526 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 00:25:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-02-17 00:25:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2023-02-17 00:25:17,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2023-02-17 00:25:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2023-02-17 00:25:17,325 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2023-02-17 00:25:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:17,327 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2023-02-17 00:25:17,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2023-02-17 00:25:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:25:17,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:17,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:17,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 00:25:17,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2023-02-17 00:25:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420912962] [2023-02-17 00:25:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:17,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420912962] [2023-02-17 00:25:17,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420912962] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:17,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:17,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 00:25:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29985770] [2023-02-17 00:25:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:17,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:25:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:25:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 00:25:17,434 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:17,751 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2023-02-17 00:25:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:25:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 00:25:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:17,756 INFO L225 Difference]: With dead ends: 1148 [2023-02-17 00:25:17,756 INFO L226 Difference]: Without dead ends: 1076 [2023-02-17 00:25:17,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:17,757 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:17,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1525 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 00:25:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-02-17 00:25:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2023-02-17 00:25:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2023-02-17 00:25:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2023-02-17 00:25:17,790 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2023-02-17 00:25:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:17,790 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2023-02-17 00:25:17,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2023-02-17 00:25:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:25:17,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:17,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 00:25:17,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2023-02-17 00:25:17,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479784167] [2023-02-17 00:25:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:17,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:17,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479784167] [2023-02-17 00:25:17,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479784167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:17,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:17,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 00:25:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006322223] [2023-02-17 00:25:17,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:25:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:25:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 00:25:17,937 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:18,325 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2023-02-17 00:25:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:25:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 00:25:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:18,330 INFO L225 Difference]: With dead ends: 1358 [2023-02-17 00:25:18,330 INFO L226 Difference]: Without dead ends: 1349 [2023-02-17 00:25:18,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:18,331 INFO L413 NwaCegarLoop]: 1172 mSDtfsCounter, 1143 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:18,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1819 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 00:25:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-02-17 00:25:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2023-02-17 00:25:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2023-02-17 00:25:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2023-02-17 00:25:18,370 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2023-02-17 00:25:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:18,371 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2023-02-17 00:25:18,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2023-02-17 00:25:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:25:18,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:18,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:18,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 00:25:18,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2023-02-17 00:25:18,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:18,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985648475] [2023-02-17 00:25:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:18,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:18,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985648475] [2023-02-17 00:25:18,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985648475] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:18,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414153255] [2023-02-17 00:25:18,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:18,433 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:18,482 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2023-02-17 00:25:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 00:25:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:18,485 INFO L225 Difference]: With dead ends: 1192 [2023-02-17 00:25:18,486 INFO L226 Difference]: Without dead ends: 1164 [2023-02-17 00:25:18,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:18,486 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:18,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:25:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-17 00:25:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2023-02-17 00:25:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2023-02-17 00:25:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2023-02-17 00:25:18,531 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2023-02-17 00:25:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:18,532 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2023-02-17 00:25:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2023-02-17 00:25:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:25:18,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:18,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:18,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 00:25:18,533 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2023-02-17 00:25:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:18,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129288876] [2023-02-17 00:25:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:18,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:18,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129288876] [2023-02-17 00:25:18,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129288876] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:18,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:18,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:25:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789166923] [2023-02-17 00:25:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:25:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:25:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:18,581 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:18,663 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2023-02-17 00:25:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:25:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 00:25:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:18,668 INFO L225 Difference]: With dead ends: 1402 [2023-02-17 00:25:18,668 INFO L226 Difference]: Without dead ends: 1389 [2023-02-17 00:25:18,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:25:18,669 INFO L413 NwaCegarLoop]: 1188 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, 2000 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:18,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 2000 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:25:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-02-17 00:25:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2023-02-17 00:25:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2023-02-17 00:25:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2023-02-17 00:25:18,735 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2023-02-17 00:25:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:18,735 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2023-02-17 00:25:18,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2023-02-17 00:25:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 00:25:18,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:18,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 00:25:18,737 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2023-02-17 00:25:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423694911] [2023-02-17 00:25:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:18,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-17 00:25:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:18,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:18,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423694911] [2023-02-17 00:25:18,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423694911] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:18,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:18,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 00:25:18,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787902973] [2023-02-17 00:25:18,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:25:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:25:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 00:25:18,824 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 00:25:21,383 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 [] [2023-02-17 00:25:22,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:25,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:28,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:31,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:33,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:35,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:35,068 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2023-02-17 00:25:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:25:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-02-17 00:25:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:35,074 INFO L225 Difference]: With dead ends: 1761 [2023-02-17 00:25:35,074 INFO L226 Difference]: Without dead ends: 1129 [2023-02-17 00:25:35,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:35,076 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 919 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 126 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:35,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1195 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 374 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2023-02-17 00:25:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2023-02-17 00:25:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2023-02-17 00:25:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2023-02-17 00:25:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2023-02-17 00:25:35,124 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2023-02-17 00:25:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:35,124 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2023-02-17 00:25:35,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 00:25:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2023-02-17 00:25:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 00:25:35,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:35,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:35,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 00:25:35,126 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2023-02-17 00:25:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:35,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078692300] [2023-02-17 00:25:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:35,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:35,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078692300] [2023-02-17 00:25:35,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078692300] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:35,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:35,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:25:35,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224199276] [2023-02-17 00:25:35,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:35,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:25:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:35,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:25:35,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:25:35,296 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:35,438 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2023-02-17 00:25:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 00:25:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-17 00:25:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:35,443 INFO L225 Difference]: With dead ends: 1082 [2023-02-17 00:25:35,443 INFO L226 Difference]: Without dead ends: 1054 [2023-02-17 00:25:35,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:25:35,444 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:35,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:25:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2023-02-17 00:25:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2023-02-17 00:25:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2023-02-17 00:25:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2023-02-17 00:25:35,488 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2023-02-17 00:25:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:35,488 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2023-02-17 00:25:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:25:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2023-02-17 00:25:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:25:35,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:35,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:35,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 00:25:35,490 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2023-02-17 00:25:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:35,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697452246] [2023-02-17 00:25:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 00:25:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-17 00:25:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:35,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:35,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697452246] [2023-02-17 00:25:35,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697452246] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:35,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:35,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:25:35,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926866844] [2023-02-17 00:25:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:25:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:25:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:35,563 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:25:40,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:43,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:45,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:48,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:25:48,261 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2023-02-17 00:25:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:25:48,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-02-17 00:25:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:25:48,266 INFO L225 Difference]: With dead ends: 1720 [2023-02-17 00:25:48,266 INFO L226 Difference]: Without dead ends: 1185 [2023-02-17 00:25:48,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:25:48,268 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 614 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 244 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-02-17 00:25:48,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2259 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2023-02-17 00:25:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2023-02-17 00:25:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2023-02-17 00:25:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2023-02-17 00:25:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2023-02-17 00:25:48,321 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2023-02-17 00:25:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:25:48,322 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2023-02-17 00:25:48,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:25:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2023-02-17 00:25:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:25:48,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:25:48,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:25:48,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 00:25:48,323 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:25:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:25:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2023-02-17 00:25:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:25:48,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729820283] [2023-02-17 00:25:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:25:48,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:25:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:48,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 00:25:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:48,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 00:25:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:25:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:25:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:25:48,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729820283] [2023-02-17 00:25:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729820283] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:25:48,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:25:48,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:25:48,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318769977] [2023-02-17 00:25:48,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:25:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:25:48,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:48,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:25:48,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:25:48,406 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:25:52,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:55,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:57,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:25:59,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:01,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:02,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:26:02,626 INFO L93 Difference]: Finished difference Result 1133 states and 1690 transitions. [2023-02-17 00:26:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 00:26:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-02-17 00:26:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:26:02,630 INFO L225 Difference]: With dead ends: 1133 [2023-02-17 00:26:02,630 INFO L226 Difference]: Without dead ends: 1105 [2023-02-17 00:26:02,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:26:02,631 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 293 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 240 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s 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, 14.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:26:02,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2328 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 710 Invalid, 4 Unknown, 0 Unchecked, 14.1s Time] [2023-02-17 00:26:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-02-17 00:26:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1022. [2023-02-17 00:26:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 809 states have (on average 1.4239802224969098) internal successors, (1152), 816 states have internal predecessors, (1152), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2023-02-17 00:26:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1520 transitions. [2023-02-17 00:26:02,686 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1520 transitions. Word has length 49 [2023-02-17 00:26:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:26:02,686 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1520 transitions. [2023-02-17 00:26:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:26:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1520 transitions. [2023-02-17 00:26:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:26:02,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:26:02,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:26:02,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 00:26:02,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:26:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:26:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894719, now seen corresponding path program 1 times [2023-02-17 00:26:02,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:26:02,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137833368] [2023-02-17 00:26:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:26:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:26:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:02,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 00:26:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 00:26:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:26:02,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:26:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137833368] [2023-02-17 00:26:02,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137833368] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:26:02,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:26:02,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:26:02,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906629052] [2023-02-17 00:26:02,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:26:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:26:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:26:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:26:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:26:02,777 INFO L87 Difference]: Start difference. First operand 1022 states and 1520 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:07,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:10,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:12,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:26:14,463 INFO L93 Difference]: Finished difference Result 1104 states and 1653 transitions. [2023-02-17 00:26:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:26:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-17 00:26:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:26:14,467 INFO L225 Difference]: With dead ends: 1104 [2023-02-17 00:26:14,467 INFO L226 Difference]: Without dead ends: 1097 [2023-02-17 00:26:14,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:26:14,468 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 277 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 228 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-02-17 00:26:14,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 2321 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 729 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2023-02-17 00:26:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2023-02-17 00:26:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1034. [2023-02-17 00:26:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 821 states have (on average 1.4202192448233861) internal successors, (1166), 828 states have internal predecessors, (1166), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2023-02-17 00:26:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1534 transitions. [2023-02-17 00:26:14,512 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1534 transitions. Word has length 49 [2023-02-17 00:26:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:26:14,513 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1534 transitions. [2023-02-17 00:26:14,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1534 transitions. [2023-02-17 00:26:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 00:26:14,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:26:14,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:26:14,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 00:26:14,515 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:26:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:26:14,515 INFO L85 PathProgramCache]: Analyzing trace with hash 725085215, now seen corresponding path program 1 times [2023-02-17 00:26:14,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:26:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884106182] [2023-02-17 00:26:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:26:14,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:26:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-17 00:26:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 00:26:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:26:14,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:26:14,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884106182] [2023-02-17 00:26:14,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884106182] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:26:14,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:26:14,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:26:14,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265653138] [2023-02-17 00:26:14,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:26:14,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:26:14,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:26:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:26:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:26:14,583 INFO L87 Difference]: Start difference. First operand 1034 states and 1534 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:26:19,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:22,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:24,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:26,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:27,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:26:27,216 INFO L93 Difference]: Finished difference Result 1172 states and 1735 transitions. [2023-02-17 00:26:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:26:27,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-17 00:26:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:26:27,221 INFO L225 Difference]: With dead ends: 1172 [2023-02-17 00:26:27,221 INFO L226 Difference]: Without dead ends: 1098 [2023-02-17 00:26:27,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:26:27,221 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 913 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 250 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-02-17 00:26:27,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1966 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 648 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2023-02-17 00:26:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2023-02-17 00:26:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1023. [2023-02-17 00:26:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4213759213759214) internal successors, (1157), 821 states have internal predecessors, (1157), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2023-02-17 00:26:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1521 transitions. [2023-02-17 00:26:27,267 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1521 transitions. Word has length 50 [2023-02-17 00:26:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:26:27,268 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1521 transitions. [2023-02-17 00:26:27,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:26:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1521 transitions. [2023-02-17 00:26:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 00:26:27,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:26:27,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:26:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 00:26:27,270 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:26:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:26:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1407456133, now seen corresponding path program 1 times [2023-02-17 00:26:27,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:26:27,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386498123] [2023-02-17 00:26:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:26:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:26:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:27,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 00:26:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:27,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 00:26:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:26:27,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:26:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386498123] [2023-02-17 00:26:27,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386498123] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:26:27,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:26:27,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 00:26:27,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827264236] [2023-02-17 00:26:27,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:26:27,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:26:27,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:26:27,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:26:27,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:26:27,411 INFO L87 Difference]: Start difference. First operand 1023 states and 1521 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:33,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:35,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:38,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:40,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:26:40,549 INFO L93 Difference]: Finished difference Result 1093 states and 1636 transitions. [2023-02-17 00:26:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 00:26:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-02-17 00:26:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:26:40,555 INFO L225 Difference]: With dead ends: 1093 [2023-02-17 00:26:40,556 INFO L226 Difference]: Without dead ends: 1088 [2023-02-17 00:26:40,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:26:40,556 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1122 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 269 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:26:40,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2784 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1124 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2023-02-17 00:26:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2023-02-17 00:26:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1023. [2023-02-17 00:26:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4201474201474202) internal successors, (1156), 821 states have internal predecessors, (1156), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2023-02-17 00:26:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1520 transitions. [2023-02-17 00:26:40,617 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1520 transitions. Word has length 50 [2023-02-17 00:26:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:26:40,618 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1520 transitions. [2023-02-17 00:26:40,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1520 transitions. [2023-02-17 00:26:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 00:26:40,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:26:40,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:26:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 00:26:40,620 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:26:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:26:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1394050817, now seen corresponding path program 1 times [2023-02-17 00:26:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:26:40,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802747128] [2023-02-17 00:26:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:26:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:26:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 00:26:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:40,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 00:26:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:26:40,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:26:40,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802747128] [2023-02-17 00:26:40,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802747128] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:26:40,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:26:40,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 00:26:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202657283] [2023-02-17 00:26:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:26:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 00:26:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:26:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 00:26:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:26:40,812 INFO L87 Difference]: Start difference. First operand 1023 states and 1520 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:47,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:51,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:54,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:55,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:26:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:26:55,588 INFO L93 Difference]: Finished difference Result 1075 states and 1608 transitions. [2023-02-17 00:26:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:26:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-02-17 00:26:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:26:55,594 INFO L225 Difference]: With dead ends: 1075 [2023-02-17 00:26:55,594 INFO L226 Difference]: Without dead ends: 1060 [2023-02-17 00:26:55,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:26:55,595 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 91 mSDsluCounter, 5269 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 102 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6055 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-02-17 00:26:55,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6055 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1632 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2023-02-17 00:26:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-17 00:26:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1021. [2023-02-17 00:26:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 813 states have (on average 1.4194341943419435) internal successors, (1154), 820 states have internal predecessors, (1154), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2023-02-17 00:26:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1516 transitions. [2023-02-17 00:26:55,655 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1516 transitions. Word has length 53 [2023-02-17 00:26:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:26:55,655 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1516 transitions. [2023-02-17 00:26:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1516 transitions. [2023-02-17 00:26:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 00:26:55,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:26:55,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:26:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 00:26:55,661 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:26:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:26:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1869145587, now seen corresponding path program 1 times [2023-02-17 00:26:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:26:55,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535612381] [2023-02-17 00:26:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:26:55,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:26:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:55,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-17 00:26:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:55,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 00:26:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:26:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:26:55,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:26:55,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535612381] [2023-02-17 00:26:55,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535612381] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:26:55,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:26:55,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 00:26:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918728662] [2023-02-17 00:26:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:26:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 00:26:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:26:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 00:26:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:26:55,872 INFO L87 Difference]: Start difference. First operand 1021 states and 1516 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:26:58,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:05,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:07,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:08,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:10,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:12,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:12,629 INFO L93 Difference]: Finished difference Result 1072 states and 1603 transitions. [2023-02-17 00:27:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:27:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-17 00:27:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:12,634 INFO L225 Difference]: With dead ends: 1072 [2023-02-17 00:27:12,634 INFO L226 Difference]: Without dead ends: 1057 [2023-02-17 00:27:12,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:27:12,635 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 91 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 101 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s 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, 16.7s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:12,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6004 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1619 Invalid, 3 Unknown, 0 Unchecked, 16.7s Time] [2023-02-17 00:27:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-02-17 00:27:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1018. [2023-02-17 00:27:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 811 states have (on average 1.4192355117139335) internal successors, (1151), 818 states have internal predecessors, (1151), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2023-02-17 00:27:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1511 transitions. [2023-02-17 00:27:12,714 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1511 transitions. Word has length 51 [2023-02-17 00:27:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:12,714 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1511 transitions. [2023-02-17 00:27:12,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:27:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1511 transitions. [2023-02-17 00:27:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 00:27:12,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:12,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:12,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 00:27:12,717 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -956966013, now seen corresponding path program 1 times [2023-02-17 00:27:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:12,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414923759] [2023-02-17 00:27:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:12,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 00:27:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:12,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 00:27:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:12,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414923759] [2023-02-17 00:27:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414923759] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:12,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:12,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:27:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797046403] [2023-02-17 00:27:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:12,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:27:12,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:27:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:27:12,855 INFO L87 Difference]: Start difference. First operand 1018 states and 1511 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:27:15,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:19,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:22,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:23,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:24,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:25,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:25,926 INFO L93 Difference]: Finished difference Result 2099 states and 3135 transitions. [2023-02-17 00:27:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 00:27:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-17 00:27:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:25,931 INFO L225 Difference]: With dead ends: 2099 [2023-02-17 00:27:25,932 INFO L226 Difference]: Without dead ends: 1085 [2023-02-17 00:27:25,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:25,934 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 248 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 221 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:25,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 2339 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 703 Invalid, 2 Unknown, 0 Unchecked, 13.0s Time] [2023-02-17 00:27:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2023-02-17 00:27:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1021. [2023-02-17 00:27:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 814 states have (on average 1.4176904176904177) internal successors, (1154), 821 states have internal predecessors, (1154), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2023-02-17 00:27:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1514 transitions. [2023-02-17 00:27:26,012 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1514 transitions. Word has length 51 [2023-02-17 00:27:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:26,012 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1514 transitions. [2023-02-17 00:27:26,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:27:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1514 transitions. [2023-02-17 00:27:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 00:27:26,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:26,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:26,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 00:27:26,014 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:26,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2088131427, now seen corresponding path program 1 times [2023-02-17 00:27:26,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:26,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652764247] [2023-02-17 00:27:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 00:27:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:26,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 00:27:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:26,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:26,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652764247] [2023-02-17 00:27:26,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652764247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135868038] [2023-02-17 00:27:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:26,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:26,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:27:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 00:27:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 00:27:26,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:26,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:26,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135868038] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:26,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:26,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-17 00:27:26,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318094979] [2023-02-17 00:27:26,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:26,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 00:27:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 00:27:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:27:26,546 INFO L87 Difference]: Start difference. First operand 1021 states and 1514 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:27:33,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:36,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:39,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:40,194 INFO L93 Difference]: Finished difference Result 2116 states and 3157 transitions. [2023-02-17 00:27:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:27:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-02-17 00:27:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:40,199 INFO L225 Difference]: With dead ends: 2116 [2023-02-17 00:27:40,199 INFO L226 Difference]: Without dead ends: 1100 [2023-02-17 00:27:40,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:27:40,201 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 264 mSDsluCounter, 3660 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 237 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:40,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 4412 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1211 Invalid, 2 Unknown, 0 Unchecked, 13.5s Time] [2023-02-17 00:27:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-02-17 00:27:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1035. [2023-02-17 00:27:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 828 states have (on average 1.4106280193236715) internal successors, (1168), 835 states have internal predecessors, (1168), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2023-02-17 00:27:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1528 transitions. [2023-02-17 00:27:40,256 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1528 transitions. Word has length 57 [2023-02-17 00:27:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:40,256 INFO L495 AbstractCegarLoop]: Abstraction has 1035 states and 1528 transitions. [2023-02-17 00:27:40,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:27:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1528 transitions. [2023-02-17 00:27:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 00:27:40,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:40,258 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:40,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 00:27:40,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-17 00:27:40,465 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1053556911, now seen corresponding path program 2 times [2023-02-17 00:27:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:40,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106844762] [2023-02-17 00:27:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 00:27:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:40,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-17 00:27:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 00:27:40,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106844762] [2023-02-17 00:27:40,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106844762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056470892] [2023-02-17 00:27:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:27:40,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:40,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:40,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:27:40,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 00:27:41,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 00:27:41,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:27:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 00:27:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 00:27:41,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:27:41,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056470892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:41,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:27:41,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-17 00:27:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342442995] [2023-02-17 00:27:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:41,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:27:41,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:27:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:27:41,134 INFO L87 Difference]: Start difference. First operand 1035 states and 1528 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:41,238 INFO L93 Difference]: Finished difference Result 1793 states and 2708 transitions. [2023-02-17 00:27:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:27:41,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2023-02-17 00:27:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:41,242 INFO L225 Difference]: With dead ends: 1793 [2023-02-17 00:27:41,242 INFO L226 Difference]: Without dead ends: 1044 [2023-02-17 00:27:41,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:27:41,244 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 2 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:41,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2508 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:27:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-02-17 00:27:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1044. [2023-02-17 00:27:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 835 states have (on average 1.4095808383233532) internal successors, (1177), 844 states have internal predecessors, (1177), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2023-02-17 00:27:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1539 transitions. [2023-02-17 00:27:41,297 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1539 transitions. Word has length 71 [2023-02-17 00:27:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:41,297 INFO L495 AbstractCegarLoop]: Abstraction has 1044 states and 1539 transitions. [2023-02-17 00:27:41,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1539 transitions. [2023-02-17 00:27:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 00:27:41,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:41,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:41,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 00:27:41,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-17 00:27:41,506 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1654004804, now seen corresponding path program 1 times [2023-02-17 00:27:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:41,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231567808] [2023-02-17 00:27:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:41,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 00:27:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:41,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-17 00:27:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 00:27:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231567808] [2023-02-17 00:27:41,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231567808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410774648] [2023-02-17 00:27:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:41,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:41,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:27:41,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 00:27:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:42,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 00:27:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 00:27:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 00:27:42,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410774648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:42,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:42,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-02-17 00:27:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159149511] [2023-02-17 00:27:42,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 00:27:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 00:27:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:27:42,205 INFO L87 Difference]: Start difference. First operand 1044 states and 1539 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:27:45,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:49,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:52,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:55,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:57,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:27:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:57,827 INFO L93 Difference]: Finished difference Result 2149 states and 3175 transitions. [2023-02-17 00:27:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 00:27:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-02-17 00:27:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:57,832 INFO L225 Difference]: With dead ends: 2149 [2023-02-17 00:27:57,832 INFO L226 Difference]: Without dead ends: 1116 [2023-02-17 00:27:57,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-17 00:27:57,834 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 300 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 255 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 5793 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 5793 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1678 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2023-02-17 00:27:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-02-17 00:27:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1064. [2023-02-17 00:27:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 855 states have (on average 1.4) internal successors, (1197), 864 states have internal predecessors, (1197), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2023-02-17 00:27:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1559 transitions. [2023-02-17 00:27:57,911 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1559 transitions. Word has length 72 [2023-02-17 00:27:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:57,911 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1559 transitions. [2023-02-17 00:27:57,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:27:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1559 transitions. [2023-02-17 00:27:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 00:27:57,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:57,913 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:57,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:58,120 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 351198032, now seen corresponding path program 2 times [2023-02-17 00:27:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:58,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599599854] [2023-02-17 00:27:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:58,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-02-17 00:27:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:58,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-17 00:27:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-17 00:27:58,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599599854] [2023-02-17 00:27:58,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599599854] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727534453] [2023-02-17 00:27:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:27:58,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:58,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:58,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:27:58,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 00:27:59,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:27:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:27:59,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 00:27:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-17 00:27:59,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-17 00:27:59,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727534453] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:59,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:59,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2023-02-17 00:27:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707680550] [2023-02-17 00:27:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:59,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 00:27:59,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 00:27:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-02-17 00:27:59,189 INFO L87 Difference]: Start difference. First operand 1064 states and 1559 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:28:06,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:08,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:10,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:12,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:28:13,934 INFO L93 Difference]: Finished difference Result 2185 states and 3210 transitions. [2023-02-17 00:28:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 00:28:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2023-02-17 00:28:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:28:13,938 INFO L225 Difference]: With dead ends: 2185 [2023-02-17 00:28:13,938 INFO L226 Difference]: Without dead ends: 1134 [2023-02-17 00:28:13,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2023-02-17 00:28:13,941 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 344 mSDsluCounter, 5044 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 308 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 5796 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-02-17 00:28:13,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 5796 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1782 Invalid, 3 Unknown, 0 Unchecked, 14.5s Time] [2023-02-17 00:28:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2023-02-17 00:28:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1084. [2023-02-17 00:28:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 875 states have (on average 1.3908571428571428) internal successors, (1217), 884 states have internal predecessors, (1217), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2023-02-17 00:28:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1579 transitions. [2023-02-17 00:28:13,996 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1579 transitions. Word has length 92 [2023-02-17 00:28:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:28:13,997 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 1579 transitions. [2023-02-17 00:28:13,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:28:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1579 transitions. [2023-02-17 00:28:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 00:28:13,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:28:14,000 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:28:14,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 00:28:14,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 00:28:14,208 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:28:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:28:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1476489628, now seen corresponding path program 3 times [2023-02-17 00:28:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:28:14,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001582994] [2023-02-17 00:28:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:28:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:28:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:14,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-17 00:28:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-02-17 00:28:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-17 00:28:14,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:28:14,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001582994] [2023-02-17 00:28:14,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001582994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:28:14,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372046760] [2023-02-17 00:28:14,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 00:28:14,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:28:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:28:14,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:28:14,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 00:28:15,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 00:28:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:28:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 00:28:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:28:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-02-17 00:28:15,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:28:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-02-17 00:28:15,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372046760] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:28:15,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:28:15,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-02-17 00:28:15,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268067442] [2023-02-17 00:28:15,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:28:15,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 00:28:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:28:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 00:28:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-17 00:28:15,459 INFO L87 Difference]: Start difference. First operand 1084 states and 1579 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:28:22,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:24,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:26,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:28,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:30,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:28:31,733 INFO L93 Difference]: Finished difference Result 2239 states and 3299 transitions. [2023-02-17 00:28:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 00:28:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2023-02-17 00:28:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:28:31,737 INFO L225 Difference]: With dead ends: 2239 [2023-02-17 00:28:31,737 INFO L226 Difference]: Without dead ends: 1176 [2023-02-17 00:28:31,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 00:28:31,739 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 310 mSDsluCounter, 5036 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 317 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 5775 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:28:31,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 5775 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2814 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2023-02-17 00:28:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-02-17 00:28:31,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1123. [2023-02-17 00:28:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 912 states have (on average 1.388157894736842) internal successors, (1266), 921 states have internal predecessors, (1266), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2023-02-17 00:28:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1630 transitions. [2023-02-17 00:28:31,800 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1630 transitions. Word has length 112 [2023-02-17 00:28:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:28:31,801 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1630 transitions. [2023-02-17 00:28:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:28:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1630 transitions. [2023-02-17 00:28:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-17 00:28:31,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:28:31,803 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:28:31,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 00:28:32,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 00:28:32,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:28:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:28:32,014 INFO L85 PathProgramCache]: Analyzing trace with hash -681598516, now seen corresponding path program 1 times [2023-02-17 00:28:32,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:28:32,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591185753] [2023-02-17 00:28:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:28:32,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:28:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:32,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-17 00:28:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:32,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 00:28:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-02-17 00:28:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:28:32,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591185753] [2023-02-17 00:28:32,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591185753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:28:32,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:28:32,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 00:28:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860096775] [2023-02-17 00:28:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:28:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 00:28:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:28:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 00:28:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:28:32,359 INFO L87 Difference]: Start difference. First operand 1123 states and 1630 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:28:39,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:41,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:43,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:46,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:48,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:50,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:28:50,691 INFO L93 Difference]: Finished difference Result 1165 states and 1685 transitions. [2023-02-17 00:28:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 00:28:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 132 [2023-02-17 00:28:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:28:50,695 INFO L225 Difference]: With dead ends: 1165 [2023-02-17 00:28:50,695 INFO L226 Difference]: Without dead ends: 1148 [2023-02-17 00:28:50,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 00:28:50,696 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 102 mSDsluCounter, 6017 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 100 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6792 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:28:50,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6792 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1666 Invalid, 6 Unknown, 0 Unchecked, 18.2s Time] [2023-02-17 00:28:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2023-02-17 00:28:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1120. [2023-02-17 00:28:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 910 states have (on average 1.3879120879120879) internal successors, (1263), 919 states have internal predecessors, (1263), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2023-02-17 00:28:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1625 transitions. [2023-02-17 00:28:50,778 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1625 transitions. Word has length 132 [2023-02-17 00:28:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:28:50,779 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1625 transitions. [2023-02-17 00:28:50,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 00:28:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1625 transitions. [2023-02-17 00:28:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-02-17 00:28:50,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:28:50,781 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:28:50,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-17 00:28:50,781 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:28:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:28:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2033662210, now seen corresponding path program 1 times [2023-02-17 00:28:50,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:28:50,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508175418] [2023-02-17 00:28:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:28:50,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:28:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-17 00:28:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:50,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2023-02-17 00:28:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-17 00:28:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:50,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-02-17 00:28:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:28:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-02-17 00:28:50,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:28:50,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508175418] [2023-02-17 00:28:50,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508175418] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:28:50,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:28:50,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:28:50,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925700910] [2023-02-17 00:28:50,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:28:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:28:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:28:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:28:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:28:50,928 INFO L87 Difference]: Start difference. First operand 1120 states and 1625 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:28:54,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:57,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:28:58,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:29:01,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:29:03,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 00:29:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:29:04,072 INFO L93 Difference]: Finished difference Result 1658 states and 2411 transitions. [2023-02-17 00:29:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 00:29:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 137 [2023-02-17 00:29:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:29:04,075 INFO L225 Difference]: With dead ends: 1658 [2023-02-17 00:29:04,076 INFO L226 Difference]: Without dead ends: 1167 [2023-02-17 00:29:04,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:29:04,078 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 470 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 316 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s 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, 13.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:29:04,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 2858 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 854 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2023-02-17 00:29:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2023-02-17 00:29:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1122. [2023-02-17 00:29:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 912 states have (on average 1.3837719298245614) internal successors, (1262), 921 states have internal predecessors, (1262), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (213), 149 states have call predecessors, (213), 145 states have call successors, (213) [2023-02-17 00:29:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1625 transitions. [2023-02-17 00:29:04,139 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1625 transitions. Word has length 137 [2023-02-17 00:29:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:29:04,139 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1625 transitions. [2023-02-17 00:29:04,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:29:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1625 transitions. [2023-02-17 00:29:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-17 00:29:04,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:29:04,142 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:29:04,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-17 00:29:04,142 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:29:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:29:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash 237996309, now seen corresponding path program 4 times [2023-02-17 00:29:04,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:29:04,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404112500] [2023-02-17 00:29:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:29:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:29:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:29:04,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-02-17 00:29:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:29:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-02-17 00:29:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:29:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-02-17 00:29:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:29:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404112500] [2023-02-17 00:29:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404112500] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:29:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737731896] [2023-02-17 00:29:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 00:29:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:29:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:29:04,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:29:04,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 00:29:05,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 00:29:05,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:29:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 00:29:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:29:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-02-17 00:29:05,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:29:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-02-17 00:29:05,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737731896] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:29:05,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:29:05,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 8] total 30 [2023-02-17 00:29:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393742759] [2023-02-17 00:29:05,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:29:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 00:29:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:29:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 00:29:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-02-17 00:29:05,807 INFO L87 Difference]: Start difference. First operand 1122 states and 1625 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5)