./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 574ddb4e 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-?-574ddb4 [2023-02-18 13:32:49,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 13:32:49,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 13:32:50,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 13:32:50,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 13:32:50,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 13:32:50,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 13:32:50,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 13:32:50,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 13:32:50,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 13:32:50,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 13:32:50,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 13:32:50,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 13:32:50,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 13:32:50,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 13:32:50,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 13:32:50,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 13:32:50,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 13:32:50,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 13:32:50,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 13:32:50,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 13:32:50,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 13:32:50,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 13:32:50,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 13:32:50,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 13:32:50,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 13:32:50,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 13:32:50,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 13:32:50,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 13:32:50,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 13:32:50,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 13:32:50,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 13:32:50,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 13:32:50,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 13:32:50,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 13:32:50,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 13:32:50,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 13:32:50,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 13:32:50,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 13:32:50,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 13:32:50,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 13:32:50,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 13:32:50,089 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 13:32:50,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 13:32:50,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 13:32:50,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 13:32:50,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 13:32:50,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 13:32:50,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 13:32:50,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 13:32:50,091 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 13:32:50,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 13:32:50,092 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 13:32:50,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 13:32:50,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 13:32:50,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 13:32:50,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 13:32:50,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 13:32:50,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 13:32:50,093 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 13:32:50,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 13:32:50,094 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 13:32:50,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 13:32:50,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 13:32:50,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 13:32:50,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 13:32:50,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 13:32:50,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 13:32:50,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 13:32:50,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 13:32:50,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 13:32:50,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 13:32:50,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 13:32:50,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 13:32:50,096 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 13:32:50,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 13:32:50,096 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 13:32:50,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2023-02-18 13:32:50,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 13:32:50,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 13:32:50,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 13:32:50,348 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 13:32:50,348 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 13:32:50,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-18 13:32:51,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 13:32:51,876 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 13:32:51,877 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2023-02-18 13:32:51,915 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a897cdb8/988ee779b8c6495099f99fa149fa32a9/FLAGf39ebfc08 [2023-02-18 13:32:51,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a897cdb8/988ee779b8c6495099f99fa149fa32a9 [2023-02-18 13:32:51,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 13:32:51,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 13:32:51,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 13:32:51,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 13:32:51,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 13:32:51,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:32:51" (1/1) ... [2023-02-18 13:32:51,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a694a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:51, skipping insertion in model container [2023-02-18 13:32:51,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:32:51" (1/1) ... [2023-02-18 13:32:51,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 13:32:52,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 13:32:52,612 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] [2023-02-18 13:32:52,726 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,729 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,731 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,736 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,744 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,745 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,747 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,748 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,749 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,749 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,750 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,752 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,761 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:52,761 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 13:32:53,176 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 13:32:53,243 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] [2023-02-18 13:32:53,255 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,256 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,256 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,257 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,259 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,259 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,260 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,260 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,261 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,261 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,261 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,262 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,263 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,264 WARN L623 FunctionHandler]: Unknown extern function memcmp [2023-02-18 13:32:53,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 13:32:53,502 INFO L208 MainTranslator]: Completed translation [2023-02-18 13:32:53,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53 WrapperNode [2023-02-18 13:32:53,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 13:32:53,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 13:32:53,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 13:32:53,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 13:32:53,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,677 INFO L138 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2023-02-18 13:32:53,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 13:32:53,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 13:32:53,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 13:32:53,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 13:32:53,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 13:32:53,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 13:32:53,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 13:32:53,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 13:32:53,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (1/1) ... [2023-02-18 13:32:53,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 13:32:53,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:32:53,922 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) [2023-02-18 13:32:53,933 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 [2023-02-18 13:32:53,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-18 13:32:53,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-18 13:32:53,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-18 13:32:53,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 13:32:53,961 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-18 13:32:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-18 13:32:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-18 13:32:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-18 13:32:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2023-02-18 13:32:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2023-02-18 13:32:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 13:32:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2023-02-18 13:32:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2023-02-18 13:32:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2023-02-18 13:32:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2023-02-18 13:32:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-18 13:32:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-18 13:32:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-18 13:32:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-18 13:32:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2023-02-18 13:32:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2023-02-18 13:32:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-18 13:32:53,964 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-18 13:32:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 13:32:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2023-02-18 13:32:53,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2023-02-18 13:32:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2023-02-18 13:32:53,965 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2023-02-18 13:32:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 13:32:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 13:32:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-18 13:32:53,966 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2023-02-18 13:32:53,966 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2023-02-18 13:32:53,966 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 13:32:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-18 13:32:53,966 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-18 13:32:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2023-02-18 13:32:53,967 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2023-02-18 13:32:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 13:32:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2023-02-18 13:32:53,967 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2023-02-18 13:32:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-18 13:32:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-18 13:32:53,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-18 13:32:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 13:32:53,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 13:32:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2023-02-18 13:32:53,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2023-02-18 13:32:54,418 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 13:32:54,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 13:32:54,586 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,601 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-18 13:32:54,601 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-18 13:32:54,933 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,956 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2023-02-18 13:32:54,956 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2023-02-18 13:32:54,973 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,974 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,975 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,981 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,988 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:32:54,993 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:33:04,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2023-02-18 13:33:04,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2023-02-18 13:33:04,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2023-02-18 13:33:04,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2023-02-18 13:33:04,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2023-02-18 13:33:04,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2023-02-18 13:33:04,721 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:33:04,724 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-18 13:33:04,725 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-18 13:33:04,740 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 13:33:04,749 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 13:33:04,749 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 13:33:04,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:33:04 BoogieIcfgContainer [2023-02-18 13:33:04,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 13:33:04,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 13:33:04,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 13:33:04,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 13:33:04,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:32:51" (1/3) ... [2023-02-18 13:33:04,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a6ceb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:33:04, skipping insertion in model container [2023-02-18 13:33:04,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:32:53" (2/3) ... [2023-02-18 13:33:04,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a6ceb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:33:04, skipping insertion in model container [2023-02-18 13:33:04,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:33:04" (3/3) ... [2023-02-18 13:33:04,758 INFO L112 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2023-02-18 13:33:04,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 13:33:04,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 13:33:04,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 13:33:04,826 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;@4de6dfbc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 13:33:04,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 13:33:04,833 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) [2023-02-18 13:33:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 13:33:04,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:04,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:33:04,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2023-02-18 13:33:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:04,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445196881] [2023-02-18 13:33:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:05,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445196881] [2023-02-18 13:33:05,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445196881] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:05,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:05,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039749782] [2023-02-18 13:33:05,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:05,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:05,282 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) [2023-02-18 13:33:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:05,418 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2023-02-18 13:33:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:05,420 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 [2023-02-18 13:33:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:05,437 INFO L225 Difference]: With dead ends: 1237 [2023-02-18 13:33:05,438 INFO L226 Difference]: Without dead ends: 610 [2023-02-18 13:33:05,445 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 [2023-02-18 13:33:05,448 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:05,448 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] [2023-02-18 13:33:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-02-18 13:33:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2023-02-18 13:33:05,519 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) [2023-02-18 13:33:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2023-02-18 13:33:05,524 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2023-02-18 13:33:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:05,525 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2023-02-18 13:33:05,525 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) [2023-02-18 13:33:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2023-02-18 13:33:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 13:33:05,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:05,526 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] [2023-02-18 13:33:05,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 13:33:05,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2023-02-18 13:33:05,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824059831] [2023-02-18 13:33:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824059831] [2023-02-18 13:33:05,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824059831] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:05,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:05,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:05,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230962417] [2023-02-18 13:33:05,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:05,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:05,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:05,627 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) [2023-02-18 13:33:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:05,807 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2023-02-18 13:33:05,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:05,808 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 [2023-02-18 13:33:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:05,816 INFO L225 Difference]: With dead ends: 1123 [2023-02-18 13:33:05,816 INFO L226 Difference]: Without dead ends: 882 [2023-02-18 13:33:05,820 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 [2023-02-18 13:33:05,822 INFO L413 NwaCegarLoop]: 1241 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, 1655 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 [2023-02-18 13:33:05,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1655 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 13:33:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-02-18 13:33:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2023-02-18 13:33:05,871 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) [2023-02-18 13:33:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2023-02-18 13:33:05,876 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2023-02-18 13:33:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:05,876 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2023-02-18 13:33:05,876 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) [2023-02-18 13:33:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2023-02-18 13:33:05,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 13:33:05,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:05,878 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] [2023-02-18 13:33:05,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 13:33:05,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2023-02-18 13:33:05,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:05,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32761886] [2023-02-18 13:33:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:05,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32761886] [2023-02-18 13:33:05,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32761886] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:05,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:05,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:05,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96833909] [2023-02-18 13:33:05,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:05,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:05,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:05,958 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) [2023-02-18 13:33:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:06,119 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2023-02-18 13:33:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:06,119 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 [2023-02-18 13:33:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:06,127 INFO L225 Difference]: With dead ends: 1823 [2023-02-18 13:33:06,127 INFO L226 Difference]: Without dead ends: 1428 [2023-02-18 13:33:06,128 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 [2023-02-18 13:33:06,129 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 [2023-02-18 13:33:06,130 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] [2023-02-18 13:33:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-02-18 13:33:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2023-02-18 13:33:06,183 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) [2023-02-18 13:33:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2023-02-18 13:33:06,189 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2023-02-18 13:33:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:06,190 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2023-02-18 13:33:06,190 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) [2023-02-18 13:33:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2023-02-18 13:33:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 13:33:06,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:06,195 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] [2023-02-18 13:33:06,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 13:33:06,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2023-02-18 13:33:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:06,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788078480] [2023-02-18 13:33:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788078480] [2023-02-18 13:33:06,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788078480] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:06,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:06,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232155067] [2023-02-18 13:33:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:06,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:06,403 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) [2023-02-18 13:33:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:06,463 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2023-02-18 13:33:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:06,464 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 [2023-02-18 13:33:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:06,471 INFO L225 Difference]: With dead ends: 1670 [2023-02-18 13:33:06,471 INFO L226 Difference]: Without dead ends: 1538 [2023-02-18 13:33:06,472 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 [2023-02-18 13:33:06,473 INFO L413 NwaCegarLoop]: 1148 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, 1546 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 [2023-02-18 13:33:06,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1546 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:33:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2023-02-18 13:33:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2023-02-18 13:33:06,565 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) [2023-02-18 13:33:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2023-02-18 13:33:06,573 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2023-02-18 13:33:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:06,573 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2023-02-18 13:33:06,574 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) [2023-02-18 13:33:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2023-02-18 13:33:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 13:33:06,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:06,576 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] [2023-02-18 13:33:06,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 13:33:06,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2023-02-18 13:33:06,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:06,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143540395] [2023-02-18 13:33:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:06,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:06,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143540395] [2023-02-18 13:33:06,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143540395] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:06,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:06,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 13:33:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583459571] [2023-02-18 13:33:06,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 13:33:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 13:33:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 13:33:06,750 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) [2023-02-18 13:33:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:07,331 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2023-02-18 13:33:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 13:33:07,331 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 [2023-02-18 13:33:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:07,340 INFO L225 Difference]: With dead ends: 2654 [2023-02-18 13:33:07,340 INFO L226 Difference]: Without dead ends: 1775 [2023-02-18 13:33:07,343 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 [2023-02-18 13:33:07,344 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 1422 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:07,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 1468 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 13:33:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2023-02-18 13:33:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2023-02-18 13:33:07,424 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) [2023-02-18 13:33:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-02-18 13:33:07,430 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2023-02-18 13:33:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:07,431 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-02-18 13:33:07,431 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) [2023-02-18 13:33:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-02-18 13:33:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 13:33:07,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:07,432 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] [2023-02-18 13:33:07,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 13:33:07,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2023-02-18 13:33:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792517774] [2023-02-18 13:33:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:07,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:07,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792517774] [2023-02-18 13:33:07,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792517774] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:07,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:07,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262832894] [2023-02-18 13:33:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:07,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:07,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:07,504 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) [2023-02-18 13:33:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:07,594 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2023-02-18 13:33:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:07,596 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 [2023-02-18 13:33:07,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:07,603 INFO L225 Difference]: With dead ends: 1468 [2023-02-18 13:33:07,603 INFO L226 Difference]: Without dead ends: 1464 [2023-02-18 13:33:07,603 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 [2023-02-18 13:33:07,605 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 [2023-02-18 13:33:07,607 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] [2023-02-18 13:33:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2023-02-18 13:33:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2023-02-18 13:33:07,688 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) [2023-02-18 13:33:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2023-02-18 13:33:07,695 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2023-02-18 13:33:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:07,697 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2023-02-18 13:33:07,697 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) [2023-02-18 13:33:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2023-02-18 13:33:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 13:33:07,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:07,700 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] [2023-02-18 13:33:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 13:33:07,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2023-02-18 13:33:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:07,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791856281] [2023-02-18 13:33:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:07,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:07,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-18 13:33:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:07,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791856281] [2023-02-18 13:33:07,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791856281] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:07,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:07,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:33:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144472021] [2023-02-18 13:33:07,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:33:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:33:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:33:07,861 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) [2023-02-18 13:33:13,139 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 [] [2023-02-18 13:33:14,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:17,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:20,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:20,417 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2023-02-18 13:33:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:33:20,419 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 [2023-02-18 13:33:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:20,425 INFO L225 Difference]: With dead ends: 2260 [2023-02-18 13:33:20,425 INFO L226 Difference]: Without dead ends: 1239 [2023-02-18 13:33:20,427 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 [2023-02-18 13:33:20,427 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 798 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 282 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:20,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 2437 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 561 Invalid, 1 Unknown, 0 Unchecked, 12.4s Time] [2023-02-18 13:33:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-02-18 13:33:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2023-02-18 13:33:20,472 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) [2023-02-18 13:33:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2023-02-18 13:33:20,476 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2023-02-18 13:33:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:20,476 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2023-02-18 13:33:20,477 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) [2023-02-18 13:33:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2023-02-18 13:33:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 13:33:20,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:20,478 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] [2023-02-18 13:33:20,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 13:33:20,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2023-02-18 13:33:20,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:20,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821681958] [2023-02-18 13:33:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:20,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821681958] [2023-02-18 13:33:20,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821681958] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:20,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:20,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 13:33:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461370095] [2023-02-18 13:33:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:20,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 13:33:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 13:33:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 13:33:20,594 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) [2023-02-18 13:33:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:20,985 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2023-02-18 13:33:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 13:33:20,986 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 [2023-02-18 13:33:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:20,991 INFO L225 Difference]: With dead ends: 1158 [2023-02-18 13:33:20,991 INFO L226 Difference]: Without dead ends: 1114 [2023-02-18 13:33:20,991 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 [2023-02-18 13:33:20,993 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 916 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-02-18 13:33:20,993 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] [2023-02-18 13:33:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-02-18 13:33:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2023-02-18 13:33:21,055 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) [2023-02-18 13:33:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2023-02-18 13:33:21,059 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2023-02-18 13:33:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:21,061 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2023-02-18 13:33:21,061 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) [2023-02-18 13:33:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2023-02-18 13:33:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 13:33:21,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:21,064 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] [2023-02-18 13:33:21,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 13:33:21,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2023-02-18 13:33:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:21,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149868075] [2023-02-18 13:33:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:21,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:21,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:21,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149868075] [2023-02-18 13:33:21,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149868075] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:21,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:21,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 13:33:21,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530714869] [2023-02-18 13:33:21,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:21,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 13:33:21,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 13:33:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 13:33:21,215 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) [2023-02-18 13:33:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:21,603 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2023-02-18 13:33:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 13:33:21,604 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 [2023-02-18 13:33:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:21,609 INFO L225 Difference]: With dead ends: 1148 [2023-02-18 13:33:21,609 INFO L226 Difference]: Without dead ends: 1076 [2023-02-18 13:33:21,610 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 [2023-02-18 13:33:21,612 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 895 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-02-18 13:33:21,612 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] [2023-02-18 13:33:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-02-18 13:33:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2023-02-18 13:33:21,686 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) [2023-02-18 13:33:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2023-02-18 13:33:21,689 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2023-02-18 13:33:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:21,689 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2023-02-18 13:33:21,690 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) [2023-02-18 13:33:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2023-02-18 13:33:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 13:33:21,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:21,692 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] [2023-02-18 13:33:21,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 13:33:21,693 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2023-02-18 13:33:21,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:21,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113887557] [2023-02-18 13:33:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:21,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113887557] [2023-02-18 13:33:21,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113887557] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:21,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:21,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 13:33:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883795813] [2023-02-18 13:33:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 13:33:21,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 13:33:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 13:33:21,887 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) [2023-02-18 13:33:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:22,393 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2023-02-18 13:33:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 13:33:22,393 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 [2023-02-18 13:33:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:22,420 INFO L225 Difference]: With dead ends: 1358 [2023-02-18 13:33:22,422 INFO L226 Difference]: Without dead ends: 1349 [2023-02-18 13:33:22,423 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 [2023-02-18 13:33:22,424 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1158 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:22,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1801 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 13:33:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-02-18 13:33:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2023-02-18 13:33:22,478 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) [2023-02-18 13:33:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2023-02-18 13:33:22,484 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2023-02-18 13:33:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:22,484 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2023-02-18 13:33:22,484 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) [2023-02-18 13:33:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2023-02-18 13:33:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 13:33:22,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:22,487 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] [2023-02-18 13:33:22,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 13:33:22,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2023-02-18 13:33:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:22,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102891894] [2023-02-18 13:33:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:22,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102891894] [2023-02-18 13:33:22,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102891894] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:22,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:22,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759439568] [2023-02-18 13:33:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:22,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:22,563 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) [2023-02-18 13:33:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:22,633 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2023-02-18 13:33:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:22,634 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 [2023-02-18 13:33:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:22,638 INFO L225 Difference]: With dead ends: 1192 [2023-02-18 13:33:22,638 INFO L226 Difference]: Without dead ends: 1164 [2023-02-18 13:33:22,639 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 [2023-02-18 13:33:22,639 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 [2023-02-18 13:33:22,640 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] [2023-02-18 13:33:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-18 13:33:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2023-02-18 13:33:22,724 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) [2023-02-18 13:33:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2023-02-18 13:33:22,728 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2023-02-18 13:33:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:22,728 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2023-02-18 13:33:22,728 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) [2023-02-18 13:33:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2023-02-18 13:33:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 13:33:22,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:22,730 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] [2023-02-18 13:33:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 13:33:22,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2023-02-18 13:33:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:22,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470240748] [2023-02-18 13:33:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:22,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470240748] [2023-02-18 13:33:22,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470240748] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:22,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:22,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:22,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109998069] [2023-02-18 13:33:22,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:22,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:22,803 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) [2023-02-18 13:33:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:22,920 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2023-02-18 13:33:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:22,920 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 [2023-02-18 13:33:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:22,929 INFO L225 Difference]: With dead ends: 1402 [2023-02-18 13:33:22,929 INFO L226 Difference]: Without dead ends: 1389 [2023-02-18 13:33:22,930 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 [2023-02-18 13:33:22,930 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 [2023-02-18 13:33:22,930 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] [2023-02-18 13:33:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-02-18 13:33:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2023-02-18 13:33:23,028 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) [2023-02-18 13:33:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2023-02-18 13:33:23,032 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2023-02-18 13:33:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:23,033 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2023-02-18 13:33:23,033 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) [2023-02-18 13:33:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2023-02-18 13:33:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 13:33:23,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:23,035 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] [2023-02-18 13:33:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 13:33:23,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2023-02-18 13:33:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876936804] [2023-02-18 13:33:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:23,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 13:33:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876936804] [2023-02-18 13:33:23,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876936804] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:23,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:23,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 13:33:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301369055] [2023-02-18 13:33:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 13:33:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 13:33:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 13:33:23,169 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) [2023-02-18 13:33:28,120 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 [] [2023-02-18 13:33:30,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:32,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:34,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:36,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:36,578 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2023-02-18 13:33:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 13:33:36,580 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 [2023-02-18 13:33:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:36,584 INFO L225 Difference]: With dead ends: 1761 [2023-02-18 13:33:36,584 INFO L226 Difference]: Without dead ends: 1129 [2023-02-18 13:33:36,586 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 [2023-02-18 13:33:36,587 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 919 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 126 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s 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, 13.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:36,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1195 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 374 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2023-02-18 13:33:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2023-02-18 13:33:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2023-02-18 13:33:36,672 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) [2023-02-18 13:33:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2023-02-18 13:33:36,676 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2023-02-18 13:33:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:36,677 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2023-02-18 13:33:36,677 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) [2023-02-18 13:33:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2023-02-18 13:33:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 13:33:36,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:36,679 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] [2023-02-18 13:33:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 13:33:36,679 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2023-02-18 13:33:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:36,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250790457] [2023-02-18 13:33:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:33:36,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250790457] [2023-02-18 13:33:36,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250790457] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:36,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:36,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:33:36,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772102205] [2023-02-18 13:33:36,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:36,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:33:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:36,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:33:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:33:36,788 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2023-02-18 13:33:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:36,867 INFO L93 Difference]: Finished difference Result 2142 states and 3148 transitions. [2023-02-18 13:33:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:33:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 [2023-02-18 13:33:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:36,872 INFO L225 Difference]: With dead ends: 2142 [2023-02-18 13:33:36,872 INFO L226 Difference]: Without dead ends: 1076 [2023-02-18 13:33:36,875 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 [2023-02-18 13:33:36,875 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 3 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:36,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1726 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:33:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-02-18 13:33:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1073. [2023-02-18 13:33:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 852 states have (on average 1.4190140845070423) internal successors, (1209), 856 states have internal predecessors, (1209), 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) [2023-02-18 13:33:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1575 transitions. [2023-02-18 13:33:36,969 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1575 transitions. Word has length 40 [2023-02-18 13:33:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:36,969 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1575 transitions. [2023-02-18 13:33:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2023-02-18 13:33:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1575 transitions. [2023-02-18 13:33:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 13:33:36,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:36,971 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] [2023-02-18 13:33:36,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 13:33:36,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -567044612, now seen corresponding path program 1 times [2023-02-18 13:33:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100658749] [2023-02-18 13:33:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:36,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 13:33:37,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:37,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100658749] [2023-02-18 13:33:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100658749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:33:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670713550] [2023-02-18 13:33:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:33:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:33:37,125 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) [2023-02-18 13:33:37,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 13:33:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 13:33:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:33:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:33:37,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 13:33:37,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670713550] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:37,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 13:33:37,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2023-02-18 13:33:37,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762427629] [2023-02-18 13:33:37,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:33:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:37,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:33:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:33:37,540 INFO L87 Difference]: Start difference. First operand 1073 states and 1575 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2023-02-18 13:33:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:37,666 INFO L93 Difference]: Finished difference Result 1085 states and 1587 transitions. [2023-02-18 13:33:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 13:33:37,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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 46 [2023-02-18 13:33:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:37,672 INFO L225 Difference]: With dead ends: 1085 [2023-02-18 13:33:37,672 INFO L226 Difference]: Without dead ends: 1057 [2023-02-18 13:33:37,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:33:37,674 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:37,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:33:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-02-18 13:33:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1057. [2023-02-18 13:33:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 836 states have (on average 1.423444976076555) internal successors, (1190), 840 states have internal predecessors, (1190), 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) [2023-02-18 13:33:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1556 transitions. [2023-02-18 13:33:37,757 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1556 transitions. Word has length 46 [2023-02-18 13:33:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:37,757 INFO L495 AbstractCegarLoop]: Abstraction has 1057 states and 1556 transitions. [2023-02-18 13:33:37,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2023-02-18 13:33:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1556 transitions. [2023-02-18 13:33:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:33:37,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:37,759 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] [2023-02-18 13:33:37,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 13:33:37,967 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,SelfDestructingSolverStorable14 [2023-02-18 13:33:37,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -37524606, now seen corresponding path program 1 times [2023-02-18 13:33:37,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:37,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109999322] [2023-02-18 13:33:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:37,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:38,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 13:33:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 13:33:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:33:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109999322] [2023-02-18 13:33:38,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109999322] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:38,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:38,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:33:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801926356] [2023-02-18 13:33:38,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:38,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:33:38,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:33:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:33:38,097 INFO L87 Difference]: Start difference. First operand 1057 states and 1556 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-02-18 13:33:42,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:45,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:47,380 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 [] [2023-02-18 13:33:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:33:49,349 INFO L93 Difference]: Finished difference Result 1723 states and 2553 transitions. [2023-02-18 13:33:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:33:49,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 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 55 [2023-02-18 13:33:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:33:49,356 INFO L225 Difference]: With dead ends: 1723 [2023-02-18 13:33:49,356 INFO L226 Difference]: Without dead ends: 1188 [2023-02-18 13:33:49,357 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 [2023-02-18 13:33:49,358 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 614 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 244 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s 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, 11.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:33:49,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2259 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2023-02-18 13:33:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2023-02-18 13:33:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1024. [2023-02-18 13:33:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 811 states have (on average 1.4229346485819976) internal successors, (1154), 818 states have internal predecessors, (1154), 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) [2023-02-18 13:33:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1522 transitions. [2023-02-18 13:33:49,426 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1522 transitions. Word has length 55 [2023-02-18 13:33:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:33:49,427 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1522 transitions. [2023-02-18 13:33:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-02-18 13:33:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1522 transitions. [2023-02-18 13:33:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:33:49,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:33:49,429 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] [2023-02-18 13:33:49,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 13:33:49,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:33:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:33:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1501383897, now seen corresponding path program 1 times [2023-02-18 13:33:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:33:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093938012] [2023-02-18 13:33:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:33:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:33:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 13:33:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:49,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 13:33:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:33:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:33:49,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:33:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093938012] [2023-02-18 13:33:49,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093938012] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:33:49,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:33:49,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:33:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726875754] [2023-02-18 13:33:49,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:33:49,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:33:49,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:33:49,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:33:49,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:33:49,542 INFO L87 Difference]: Start difference. First operand 1024 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-02-18 13:33:55,100 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 [] [2023-02-18 13:33:57,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:33:59,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:00,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:02,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:02,710 INFO L93 Difference]: Finished difference Result 1136 states and 1693 transitions. [2023-02-18 13:34:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 13:34:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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 55 [2023-02-18 13:34:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:02,715 INFO L225 Difference]: With dead ends: 1136 [2023-02-18 13:34:02,716 INFO L226 Difference]: Without dead ends: 1108 [2023-02-18 13:34:02,716 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 [2023-02-18 13:34:02,717 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 293 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 240 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:02,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2328 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 710 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2023-02-18 13:34:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2023-02-18 13:34:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1025. [2023-02-18 13:34:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 812 states have (on average 1.4224137931034482) internal successors, (1155), 819 states have internal predecessors, (1155), 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) [2023-02-18 13:34:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1523 transitions. [2023-02-18 13:34:02,784 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1523 transitions. Word has length 55 [2023-02-18 13:34:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:02,785 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1523 transitions. [2023-02-18 13:34:02,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-02-18 13:34:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1523 transitions. [2023-02-18 13:34:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:34:02,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:02,787 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] [2023-02-18 13:34:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 13:34:02,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1924085723, now seen corresponding path program 1 times [2023-02-18 13:34:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:02,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321674973] [2023-02-18 13:34:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:02,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 13:34:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:02,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 13:34:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:34:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:02,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321674973] [2023-02-18 13:34:02,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321674973] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:02,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667356104] [2023-02-18 13:34:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:02,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:02,896 INFO L87 Difference]: Start difference. First operand 1025 states and 1523 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-02-18 13:34:08,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:10,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:11,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:13,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:15,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:15,243 INFO L93 Difference]: Finished difference Result 1107 states and 1656 transitions. [2023-02-18 13:34:15,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:34:15,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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 55 [2023-02-18 13:34:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:15,250 INFO L225 Difference]: With dead ends: 1107 [2023-02-18 13:34:15,250 INFO L226 Difference]: Without dead ends: 1100 [2023-02-18 13:34:15,250 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 [2023-02-18 13:34:15,251 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 277 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:15,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 2321 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 731 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2023-02-18 13:34:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-02-18 13:34:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1037. [2023-02-18 13:34:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 824 states have (on average 1.4186893203883495) internal successors, (1169), 831 states have internal predecessors, (1169), 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) [2023-02-18 13:34:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1537 transitions. [2023-02-18 13:34:15,319 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1537 transitions. Word has length 55 [2023-02-18 13:34:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:15,319 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1537 transitions. [2023-02-18 13:34:15,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-02-18 13:34:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1537 transitions. [2023-02-18 13:34:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 13:34:15,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:15,322 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] [2023-02-18 13:34:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 13:34:15,322 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1658427333, now seen corresponding path program 1 times [2023-02-18 13:34:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669214236] [2023-02-18 13:34:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:15,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:15,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:34:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 13:34:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:34:15,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669214236] [2023-02-18 13:34:15,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669214236] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:15,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:15,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:15,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513940991] [2023-02-18 13:34:15,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:15,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:15,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:15,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:15,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:15,419 INFO L87 Difference]: Start difference. First operand 1037 states and 1537 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-02-18 13:34:16,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:20,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:23,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:24,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:26,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:28,722 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 [] [2023-02-18 13:34:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:29,698 INFO L93 Difference]: Finished difference Result 1175 states and 1738 transitions. [2023-02-18 13:34:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:34:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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 56 [2023-02-18 13:34:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:29,705 INFO L225 Difference]: With dead ends: 1175 [2023-02-18 13:34:29,705 INFO L226 Difference]: Without dead ends: 1101 [2023-02-18 13:34:29,706 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 [2023-02-18 13:34:29,706 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 913 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 250 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:29,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1966 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 647 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2023-02-18 13:34:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2023-02-18 13:34:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1026. [2023-02-18 13:34:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 817 states have (on average 1.419828641370869) internal successors, (1160), 824 states have internal predecessors, (1160), 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) [2023-02-18 13:34:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1524 transitions. [2023-02-18 13:34:29,777 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1524 transitions. Word has length 56 [2023-02-18 13:34:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:29,778 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1524 transitions. [2023-02-18 13:34:29,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-02-18 13:34:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1524 transitions. [2023-02-18 13:34:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 13:34:29,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:29,780 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] [2023-02-18 13:34:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-18 13:34:29,780 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash -474114015, now seen corresponding path program 1 times [2023-02-18 13:34:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484870406] [2023-02-18 13:34:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:29,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 13:34:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:29,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 13:34:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:34:29,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484870406] [2023-02-18 13:34:29,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484870406] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:29,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:29,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:34:29,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066253302] [2023-02-18 13:34:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:29,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:34:29,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:29,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:34:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:34:29,942 INFO L87 Difference]: Start difference. First operand 1026 states and 1524 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 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) [2023-02-18 13:34:34,599 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 [] [2023-02-18 13:34:37,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:39,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:41,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:43,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:43,962 INFO L93 Difference]: Finished difference Result 1096 states and 1639 transitions. [2023-02-18 13:34:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:34:43,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 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 56 [2023-02-18 13:34:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:43,970 INFO L225 Difference]: With dead ends: 1096 [2023-02-18 13:34:43,970 INFO L226 Difference]: Without dead ends: 1091 [2023-02-18 13:34:43,970 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 [2023-02-18 13:34:43,971 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1122 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 269 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:43,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2784 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1123 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2023-02-18 13:34:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2023-02-18 13:34:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1026. [2023-02-18 13:34:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 817 states have (on average 1.4186046511627908) internal successors, (1159), 824 states have internal predecessors, (1159), 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) [2023-02-18 13:34:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1523 transitions. [2023-02-18 13:34:44,066 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1523 transitions. Word has length 56 [2023-02-18 13:34:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:44,066 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1523 transitions. [2023-02-18 13:34:44,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 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) [2023-02-18 13:34:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1523 transitions. [2023-02-18 13:34:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 13:34:44,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:44,069 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] [2023-02-18 13:34:44,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-18 13:34:44,069 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1294656295, now seen corresponding path program 1 times [2023-02-18 13:34:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:44,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538952213] [2023-02-18 13:34:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:44,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:44,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 13:34:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:34:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:34:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538952213] [2023-02-18 13:34:44,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538952213] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:44,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:44,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:34:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222250069] [2023-02-18 13:34:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:44,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:34:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:44,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:34:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:34:44,333 INFO L87 Difference]: Start difference. First operand 1026 states and 1523 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 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) [2023-02-18 13:34:51,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:54,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:55,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:57,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:59,291 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 [] [2023-02-18 13:35:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:00,057 INFO L93 Difference]: Finished difference Result 1078 states and 1611 transitions. [2023-02-18 13:35:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 13:35:00,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 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 57 [2023-02-18 13:35:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:00,063 INFO L225 Difference]: With dead ends: 1078 [2023-02-18 13:35:00,063 INFO L226 Difference]: Without dead ends: 1063 [2023-02-18 13:35:00,064 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 [2023-02-18 13:35:00,065 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 91 mSDsluCounter, 5248 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 102 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6030 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:00,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6030 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1628 Invalid, 3 Unknown, 0 Unchecked, 15.6s Time] [2023-02-18 13:35:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2023-02-18 13:35:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1024. [2023-02-18 13:35:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 816 states have (on average 1.4178921568627452) internal successors, (1157), 823 states have internal predecessors, (1157), 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) [2023-02-18 13:35:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1519 transitions. [2023-02-18 13:35:00,145 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1519 transitions. Word has length 57 [2023-02-18 13:35:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:00,146 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1519 transitions. [2023-02-18 13:35:00,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 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) [2023-02-18 13:35:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1519 transitions. [2023-02-18 13:35:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 13:35:00,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:00,148 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] [2023-02-18 13:35:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-18 13:35:00,148 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2088131427, now seen corresponding path program 1 times [2023-02-18 13:35:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314224521] [2023-02-18 13:35:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:00,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 13:35:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 13:35:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 13:35:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:00,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314224521] [2023-02-18 13:35:00,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314224521] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:35:00,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705883217] [2023-02-18 13:35:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:00,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:35:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:35:00,353 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) [2023-02-18 13:35:00,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 13:35:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 13:35:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:35:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 13:35:00,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:35:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 13:35:00,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705883217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:35:00,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:35:00,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-18 13:35:00,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185023877] [2023-02-18 13:35:00,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:35:00,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:35:00,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:00,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:35:00,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:35:00,835 INFO L87 Difference]: Start difference. First operand 1024 states and 1519 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) [2023-02-18 13:35:07,859 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 [] [2023-02-18 13:35:10,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:11,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:13,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:15,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:16,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:16,761 INFO L93 Difference]: Finished difference Result 2122 states and 3167 transitions. [2023-02-18 13:35:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:35:16,765 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 [2023-02-18 13:35:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:16,770 INFO L225 Difference]: With dead ends: 2122 [2023-02-18 13:35:16,770 INFO L226 Difference]: Without dead ends: 1103 [2023-02-18 13:35:16,773 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 [2023-02-18 13:35:16,773 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 266 mSDsluCounter, 2986 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 242 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 3742 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:16,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 3742 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1051 Invalid, 4 Unknown, 0 Unchecked, 15.8s Time] [2023-02-18 13:35:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2023-02-18 13:35:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1038. [2023-02-18 13:35:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 830 states have (on average 1.4108433734939758) internal successors, (1171), 837 states have internal predecessors, (1171), 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) [2023-02-18 13:35:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1533 transitions. [2023-02-18 13:35:16,870 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1533 transitions. Word has length 57 [2023-02-18 13:35:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:16,870 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1533 transitions. [2023-02-18 13:35:16,871 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) [2023-02-18 13:35:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1533 transitions. [2023-02-18 13:35:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 13:35:16,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:16,873 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] [2023-02-18 13:35:16,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 13:35:17,080 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,SelfDestructingSolverStorable21 [2023-02-18 13:35:17,080 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1053556911, now seen corresponding path program 2 times [2023-02-18 13:35:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065788855] [2023-02-18 13:35:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:17,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 13:35:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:35:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 13:35:17,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065788855] [2023-02-18 13:35:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065788855] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:35:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483674861] [2023-02-18 13:35:17,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 13:35:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:35:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:35:17,365 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) [2023-02-18 13:35:17,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 13:35:17,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-18 13:35:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 13:35:17,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 13:35:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:35:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 13:35:17,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 13:35:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483674861] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:17,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 13:35:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-18 13:35:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015706245] [2023-02-18 13:35:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 13:35:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 13:35:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:35:17,840 INFO L87 Difference]: Start difference. First operand 1038 states and 1533 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) [2023-02-18 13:35:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:17,983 INFO L93 Difference]: Finished difference Result 1796 states and 2713 transitions. [2023-02-18 13:35:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 13:35:17,984 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 [2023-02-18 13:35:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:17,988 INFO L225 Difference]: With dead ends: 1796 [2023-02-18 13:35:17,988 INFO L226 Difference]: Without dead ends: 1047 [2023-02-18 13:35:17,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:35:17,990 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 2 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2520 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 [2023-02-18 13:35:17,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2520 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:35:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-18 13:35:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1047. [2023-02-18 13:35:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 837 states have (on average 1.4097968936678613) internal successors, (1180), 846 states have internal predecessors, (1180), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2023-02-18 13:35:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1544 transitions. [2023-02-18 13:35:18,073 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1544 transitions. Word has length 71 [2023-02-18 13:35:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:18,073 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 1544 transitions. [2023-02-18 13:35:18,074 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) [2023-02-18 13:35:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1544 transitions. [2023-02-18 13:35:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 13:35:18,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:18,077 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] [2023-02-18 13:35:18,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 13:35:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:35:18,285 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1654004804, now seen corresponding path program 1 times [2023-02-18 13:35:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:18,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50861598] [2023-02-18 13:35:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 13:35:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-18 13:35:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 13:35:18,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50861598] [2023-02-18 13:35:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50861598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:35:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596203227] [2023-02-18 13:35:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:18,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:35:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:35:18,536 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) [2023-02-18 13:35:18,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 13:35:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 13:35:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:35:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 13:35:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:35:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 13:35:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596203227] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:35:19,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:35:19,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 13:35:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122907914] [2023-02-18 13:35:19,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:35:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:35:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:35:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:35:19,141 INFO L87 Difference]: Start difference. First operand 1047 states and 1544 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:22,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:27,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:31,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:33,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:36,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:36,387 INFO L93 Difference]: Finished difference Result 2159 states and 3191 transitions. [2023-02-18 13:35:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:35:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-02-18 13:35:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:36,391 INFO L225 Difference]: With dead ends: 2159 [2023-02-18 13:35:36,391 INFO L226 Difference]: Without dead ends: 1123 [2023-02-18 13:35:36,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-18 13:35:36,394 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 272 mSDsluCounter, 5076 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 249 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 5833 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:36,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 5833 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1631 Invalid, 4 Unknown, 0 Unchecked, 17.1s Time] [2023-02-18 13:35:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2023-02-18 13:35:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1075. [2023-02-18 13:35:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 865 states have (on average 1.3965317919075144) internal successors, (1208), 874 states have internal predecessors, (1208), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2023-02-18 13:35:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1572 transitions. [2023-02-18 13:35:36,473 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1572 transitions. Word has length 72 [2023-02-18 13:35:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:36,473 INFO L495 AbstractCegarLoop]: Abstraction has 1075 states and 1572 transitions. [2023-02-18 13:35:36,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1572 transitions. [2023-02-18 13:35:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 13:35:36,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:36,475 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:36,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 13:35:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:35:36,686 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -306284904, now seen corresponding path program 2 times [2023-02-18 13:35:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:36,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738491305] [2023-02-18 13:35:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:37,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-18 13:35:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-18 13:35:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-02-18 13:35:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738491305] [2023-02-18 13:35:37,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738491305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:35:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806616056] [2023-02-18 13:35:37,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 13:35:37,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:35:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:35:37,196 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) [2023-02-18 13:35:37,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 13:35:38,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 13:35:38,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 13:35:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 13:35:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:35:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-02-18 13:35:38,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:35:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-18 13:35:38,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806616056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:35:38,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:35:38,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 5] total 19 [2023-02-18 13:35:38,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998990489] [2023-02-18 13:35:38,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:35:38,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 13:35:38,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 13:35:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:35:38,161 INFO L87 Difference]: Start difference. First operand 1075 states and 1572 transitions. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 17 states have internal predecessors, (107), 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) [2023-02-18 13:35:45,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:47,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:49,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:52,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:53,439 INFO L93 Difference]: Finished difference Result 2217 states and 3275 transitions. [2023-02-18 13:35:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 13:35:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 17 states have internal predecessors, (107), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 100 [2023-02-18 13:35:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:53,445 INFO L225 Difference]: With dead ends: 2217 [2023-02-18 13:35:53,445 INFO L226 Difference]: Without dead ends: 1155 [2023-02-18 13:35:53,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2023-02-18 13:35:53,448 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 287 mSDsluCounter, 5776 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 280 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 6523 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:53,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 6523 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2328 Invalid, 4 Unknown, 0 Unchecked, 15.0s Time] [2023-02-18 13:35:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2023-02-18 13:35:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1102. [2023-02-18 13:35:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 890 states have (on average 1.398876404494382) internal successors, (1245), 899 states have internal predecessors, (1245), 153 states have call successors, (153), 51 states have call predecessors, (153), 58 states have return successors, (213), 151 states have call predecessors, (213), 147 states have call successors, (213) [2023-02-18 13:35:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1611 transitions. [2023-02-18 13:35:53,535 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1611 transitions. Word has length 100 [2023-02-18 13:35:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:53,535 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1611 transitions. [2023-02-18 13:35:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 17 states have internal predecessors, (107), 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) [2023-02-18 13:35:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1611 transitions. [2023-02-18 13:35:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 13:35:53,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:53,541 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:53,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 13:35:53,751 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,SelfDestructingSolverStorable24 [2023-02-18 13:35:53,751 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash 742746219, now seen corresponding path program 1 times [2023-02-18 13:35:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:53,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885651181] [2023-02-18 13:35:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:54,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:35:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:54,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:35:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 13:35:54,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:54,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885651181] [2023-02-18 13:35:54,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885651181] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:54,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:54,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:35:54,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353128568] [2023-02-18 13:35:54,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:54,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:35:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:35:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:35:54,134 INFO L87 Difference]: Start difference. First operand 1102 states and 1611 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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) [2023-02-18 13:36:00,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:02,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:04,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:06,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:08,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:10,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:10,627 INFO L93 Difference]: Finished difference Result 1142 states and 1664 transitions. [2023-02-18 13:36:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 13:36:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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 107 [2023-02-18 13:36:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:10,631 INFO L225 Difference]: With dead ends: 1142 [2023-02-18 13:36:10,631 INFO L226 Difference]: Without dead ends: 1127 [2023-02-18 13:36:10,632 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 [2023-02-18 13:36:10,632 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 91 mSDsluCounter, 5305 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 101 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:10,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6078 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1511 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2023-02-18 13:36:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-18 13:36:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1099. [2023-02-18 13:36:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 888 states have (on average 1.3986486486486487) internal successors, (1242), 897 states have internal predecessors, (1242), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2023-02-18 13:36:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1606 transitions. [2023-02-18 13:36:10,742 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1606 transitions. Word has length 107 [2023-02-18 13:36:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:10,742 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1606 transitions. [2023-02-18 13:36:10,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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) [2023-02-18 13:36:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1606 transitions. [2023-02-18 13:36:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-18 13:36:10,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:10,745 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:10,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-18 13:36:10,745 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1599609908, now seen corresponding path program 1 times [2023-02-18 13:36:10,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:10,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278087969] [2023-02-18 13:36:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:11,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:36:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:11,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:36:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 13:36:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:11,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278087969] [2023-02-18 13:36:11,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278087969] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:11,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:11,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:36:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32849185] [2023-02-18 13:36:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:11,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:36:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:36:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:36:11,185 INFO L87 Difference]: Start difference. First operand 1099 states and 1606 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:36:17,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:20,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:23,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:26,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:26,155 INFO L93 Difference]: Finished difference Result 1141 states and 1661 transitions. [2023-02-18 13:36:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:36:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 108 [2023-02-18 13:36:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:26,159 INFO L225 Difference]: With dead ends: 1141 [2023-02-18 13:36:26,159 INFO L226 Difference]: Without dead ends: 1124 [2023-02-18 13:36:26,159 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 [2023-02-18 13:36:26,160 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 102 mSDsluCounter, 6017 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 100 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6792 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:26,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6792 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1668 Invalid, 4 Unknown, 0 Unchecked, 14.8s Time] [2023-02-18 13:36:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2023-02-18 13:36:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1096. [2023-02-18 13:36:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 886 states have (on average 1.3984198645598194) internal successors, (1239), 895 states have internal predecessors, (1239), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2023-02-18 13:36:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1601 transitions. [2023-02-18 13:36:26,239 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1601 transitions. Word has length 108 [2023-02-18 13:36:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:26,239 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1601 transitions. [2023-02-18 13:36:26,240 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) [2023-02-18 13:36:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1601 transitions. [2023-02-18 13:36:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-18 13:36:26,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:26,242 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-18 13:36:26,243 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:26,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash 444894614, now seen corresponding path program 1 times [2023-02-18 13:36:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656526842] [2023-02-18 13:36:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:26,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:36:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:26,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-02-18 13:36:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:26,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:36:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:26,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-02-18 13:36:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 13:36:26,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656526842] [2023-02-18 13:36:26,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656526842] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:26,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:26,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:36:26,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186791321] [2023-02-18 13:36:26,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:26,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:36:26,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:36:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:36:26,461 INFO L87 Difference]: Start difference. First operand 1096 states and 1601 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:36:31,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:32,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:34,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:36,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:39,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:41,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:43,184 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 [] [2023-02-18 13:36:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:43,293 INFO L93 Difference]: Finished difference Result 1634 states and 2387 transitions. [2023-02-18 13:36:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:36:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 113 [2023-02-18 13:36:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:43,297 INFO L225 Difference]: With dead ends: 1634 [2023-02-18 13:36:43,297 INFO L226 Difference]: Without dead ends: 1143 [2023-02-18 13:36:43,298 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 [2023-02-18 13:36:43,298 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 470 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 316 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:43,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 2858 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 853 Invalid, 4 Unknown, 0 Unchecked, 16.7s Time] [2023-02-18 13:36:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-02-18 13:36:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1098. [2023-02-18 13:36:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 888 states have (on average 1.3941441441441442) internal successors, (1238), 897 states have internal predecessors, (1238), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (213), 149 states have call predecessors, (213), 145 states have call successors, (213) [2023-02-18 13:36:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1601 transitions. [2023-02-18 13:36:43,361 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1601 transitions. Word has length 113 [2023-02-18 13:36:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:43,361 INFO L495 AbstractCegarLoop]: Abstraction has 1098 states and 1601 transitions. [2023-02-18 13:36:43,362 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) [2023-02-18 13:36:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1601 transitions. [2023-02-18 13:36:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-18 13:36:43,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:43,364 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:43,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-18 13:36:43,365 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2058986579, now seen corresponding path program 3 times [2023-02-18 13:36:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:43,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993116175] [2023-02-18 13:36:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-02-18 13:36:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-02-18 13:36:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-18 13:36:43,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:43,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993116175] [2023-02-18 13:36:43,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993116175] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:36:43,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206381669] [2023-02-18 13:36:43,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 13:36:43,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:36:43,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:36:43,889 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) [2023-02-18 13:36:43,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 13:36:46,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 13:36:46,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 13:36:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 13:36:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:36:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 13:36:46,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:36:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 13:36:46,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206381669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:36:46,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:36:46,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2023-02-18 13:36:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67618818] [2023-02-18 13:36:46,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:36:46,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 13:36:46,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 13:36:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-02-18 13:36:46,772 INFO L87 Difference]: Start difference. First operand 1098 states and 1601 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:36:57,699 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 [] [2023-02-18 13:36:59,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:00,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:03,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:04,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:05,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:05,572 INFO L93 Difference]: Finished difference Result 2294 states and 3398 transitions. [2023-02-18 13:37:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 13:37:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 109 [2023-02-18 13:37:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:05,577 INFO L225 Difference]: With dead ends: 2294 [2023-02-18 13:37:05,577 INFO L226 Difference]: Without dead ends: 1195 [2023-02-18 13:37:05,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 13:37:05,580 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 307 mSDsluCounter, 10476 mSDsCounter, 0 mSdLazyCounter, 4082 mSolverCounterSat, 286 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 11211 SdHoareTripleChecker+Invalid, 4369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 4082 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:05,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 11211 Invalid, 4369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 4082 Invalid, 1 Unknown, 0 Unchecked, 18.2s Time] [2023-02-18 13:37:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2023-02-18 13:37:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1131. [2023-02-18 13:37:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 921 states have (on average 1.3973941368078175) internal successors, (1287), 930 states have internal predecessors, (1287), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2023-02-18 13:37:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1648 transitions. [2023-02-18 13:37:05,664 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1648 transitions. Word has length 109 [2023-02-18 13:37:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:05,664 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1648 transitions. [2023-02-18 13:37:05,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:37:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1648 transitions. [2023-02-18 13:37:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 13:37:05,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:05,667 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:05,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 13:37:05,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 13:37:05,881 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash 472872621, now seen corresponding path program 1 times [2023-02-18 13:37:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:05,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269596072] [2023-02-18 13:37:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:05,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:06,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-18 13:37:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:06,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:37:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:37:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269596072] [2023-02-18 13:37:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269596072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:06,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:06,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:37:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739713769] [2023-02-18 13:37:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:37:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:37:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:37:06,355 INFO L87 Difference]: Start difference. First operand 1131 states and 1648 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:37:14,235 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 [] [2023-02-18 13:37:16,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:18,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:20,868 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 [] [2023-02-18 13:37:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:20,939 INFO L93 Difference]: Finished difference Result 1173 states and 1703 transitions. [2023-02-18 13:37:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:37:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2023-02-18 13:37:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:20,943 INFO L225 Difference]: With dead ends: 1173 [2023-02-18 13:37:20,943 INFO L226 Difference]: Without dead ends: 1156 [2023-02-18 13:37:20,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:37:20,944 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 114 mSDsluCounter, 6692 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 7464 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:20,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 7464 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1821 Invalid, 2 Unknown, 0 Unchecked, 14.4s Time] [2023-02-18 13:37:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2023-02-18 13:37:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1128. [2023-02-18 13:37:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 919 states have (on average 1.397170837867247) internal successors, (1284), 928 states have internal predecessors, (1284), 149 states have call successors, (149), 51 states have call predecessors, (149), 59 states have return successors, (210), 148 states have call predecessors, (210), 144 states have call successors, (210) [2023-02-18 13:37:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1643 transitions. [2023-02-18 13:37:21,035 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1643 transitions. Word has length 116 [2023-02-18 13:37:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:21,037 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1643 transitions. [2023-02-18 13:37:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:37:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1643 transitions. [2023-02-18 13:37:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-18 13:37:21,039 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:21,039 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:21,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-18 13:37:21,039 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash -207204572, now seen corresponding path program 1 times [2023-02-18 13:37:21,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:21,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763796354] [2023-02-18 13:37:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:37:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:21,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:37:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:37:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:21,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763796354] [2023-02-18 13:37:21,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763796354] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:21,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:21,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:37:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743541767] [2023-02-18 13:37:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:37:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:37:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:37:21,475 INFO L87 Difference]: Start difference. First operand 1128 states and 1643 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:37:29,379 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 [] [2023-02-18 13:37:31,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:35,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:37,207 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 [] [2023-02-18 13:37:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:37,345 INFO L93 Difference]: Finished difference Result 1170 states and 1698 transitions. [2023-02-18 13:37:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:37:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 115 [2023-02-18 13:37:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:37,350 INFO L225 Difference]: With dead ends: 1170 [2023-02-18 13:37:37,350 INFO L226 Difference]: Without dead ends: 1153 [2023-02-18 13:37:37,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:37:37,351 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 114 mSDsluCounter, 6583 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 97 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 7338 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:37,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 7338 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1805 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2023-02-18 13:37:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-02-18 13:37:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1125. [2023-02-18 13:37:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 917 states have (on average 1.3969465648854962) internal successors, (1281), 926 states have internal predecessors, (1281), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2023-02-18 13:37:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1638 transitions. [2023-02-18 13:37:37,473 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1638 transitions. Word has length 115 [2023-02-18 13:37:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:37,473 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1638 transitions. [2023-02-18 13:37:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:37:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1638 transitions. [2023-02-18 13:37:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 13:37:37,476 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:37,476 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:37,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-18 13:37:37,477 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2121024877, now seen corresponding path program 1 times [2023-02-18 13:37:37,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:37,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231981730] [2023-02-18 13:37:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:37,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:37,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-18 13:37:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:37,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-18 13:37:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:37:37,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231981730] [2023-02-18 13:37:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231981730] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:37,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:37,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:37:37,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620096134] [2023-02-18 13:37:37,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:37,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:37:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:37:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:37:37,695 INFO L87 Difference]: Start difference. First operand 1125 states and 1638 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:37:41,555 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 [] [2023-02-18 13:37:43,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:45,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:47,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:49,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:50,634 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 [] [2023-02-18 13:37:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:51,474 INFO L93 Difference]: Finished difference Result 1216 states and 1752 transitions. [2023-02-18 13:37:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:37:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2023-02-18 13:37:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:51,480 INFO L225 Difference]: With dead ends: 1216 [2023-02-18 13:37:51,480 INFO L226 Difference]: Without dead ends: 1182 [2023-02-18 13:37:51,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:37:51,481 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 1096 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 234 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:51,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 1810 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 790 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2023-02-18 13:37:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2023-02-18 13:37:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1125. [2023-02-18 13:37:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 917 states have (on average 1.395856052344602) internal successors, (1280), 926 states have internal predecessors, (1280), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2023-02-18 13:37:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1637 transitions. [2023-02-18 13:37:51,564 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1637 transitions. Word has length 116 [2023-02-18 13:37:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:51,564 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1637 transitions. [2023-02-18 13:37:51,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:37:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1637 transitions. [2023-02-18 13:37:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-18 13:37:51,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:51,568 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:51,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-18 13:37:51,568 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1381855418, now seen corresponding path program 1 times [2023-02-18 13:37:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681096826] [2023-02-18 13:37:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:37:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-02-18 13:37:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-02-18 13:37:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-18 13:37:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:37:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:37:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681096826] [2023-02-18 13:37:51,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681096826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:51,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:51,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:37:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804090761] [2023-02-18 13:37:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:37:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:37:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:37:51,928 INFO L87 Difference]: Start difference. First operand 1125 states and 1637 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 13:37:56,807 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 [] [2023-02-18 13:37:58,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:59,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:02,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:05,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:05,453 INFO L93 Difference]: Finished difference Result 1720 states and 2483 transitions. [2023-02-18 13:38:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:38:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 136 [2023-02-18 13:38:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:05,458 INFO L225 Difference]: With dead ends: 1720 [2023-02-18 13:38:05,458 INFO L226 Difference]: Without dead ends: 1141 [2023-02-18 13:38:05,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-18 13:38:05,461 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 1170 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 383 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:05,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 2994 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1293 Invalid, 2 Unknown, 0 Unchecked, 13.4s Time] [2023-02-18 13:38:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2023-02-18 13:38:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1101. [2023-02-18 13:38:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 898 states have (on average 1.3942093541202674) internal successors, (1252), 906 states have internal predecessors, (1252), 147 states have call successors, (147), 51 states have call predecessors, (147), 55 states have return successors, (174), 143 states have call predecessors, (174), 142 states have call successors, (174) [2023-02-18 13:38:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1573 transitions. [2023-02-18 13:38:05,549 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1573 transitions. Word has length 136 [2023-02-18 13:38:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:05,549 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1573 transitions. [2023-02-18 13:38:05,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 13:38:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1573 transitions. [2023-02-18 13:38:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-02-18 13:38:05,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:05,552 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:05,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-18 13:38:05,553 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:05,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1579635035, now seen corresponding path program 1 times [2023-02-18 13:38:05,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:05,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003523890] [2023-02-18 13:38:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:38:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-02-18 13:38:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-02-18 13:38:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-18 13:38:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:38:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:38:05,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003523890] [2023-02-18 13:38:05,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003523890] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:38:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104247081] [2023-02-18 13:38:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:05,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:38:05,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:38:05,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 13:38:05,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 13:38:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 13:38:06,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:38:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:38:06,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:38:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-18 13:38:06,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104247081] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 13:38:06,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 13:38:06,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 15 [2023-02-18 13:38:06,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481899001] [2023-02-18 13:38:06,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:06,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:38:06,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:06,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:38:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-02-18 13:38:06,727 INFO L87 Difference]: Start difference. First operand 1101 states and 1573 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:38:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:07,317 INFO L93 Difference]: Finished difference Result 1805 states and 2590 transitions. [2023-02-18 13:38:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 13:38:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 137 [2023-02-18 13:38:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:07,321 INFO L225 Difference]: With dead ends: 1805 [2023-02-18 13:38:07,322 INFO L226 Difference]: Without dead ends: 1377 [2023-02-18 13:38:07,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:38:07,324 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 1249 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:07,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 2136 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 13:38:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2023-02-18 13:38:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1162. [2023-02-18 13:38:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 945 states have (on average 1.3873015873015873) internal successors, (1311), 953 states have internal predecessors, (1311), 154 states have call successors, (154), 56 states have call predecessors, (154), 62 states have return successors, (184), 152 states have call predecessors, (184), 149 states have call successors, (184) [2023-02-18 13:38:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1649 transitions. [2023-02-18 13:38:07,450 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1649 transitions. Word has length 137 [2023-02-18 13:38:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 1162 states and 1649 transitions. [2023-02-18 13:38:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:38:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1649 transitions. [2023-02-18 13:38:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-18 13:38:07,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:07,453 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:07,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 13:38:07,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:38:07,663 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash 171468368, now seen corresponding path program 1 times [2023-02-18 13:38:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:07,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365838185] [2023-02-18 13:38:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:07,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:38:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:07,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-18 13:38:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:08,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-02-18 13:38:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-18 13:38:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365838185] [2023-02-18 13:38:08,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365838185] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:08,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:08,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:38:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108863599] [2023-02-18 13:38:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:38:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:38:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:38:08,055 INFO L87 Difference]: Start difference. First operand 1162 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 13:38:13,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:14,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:16,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:21,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:23,221 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 [] [2023-02-18 13:38:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:23,323 INFO L93 Difference]: Finished difference Result 1366 states and 1960 transitions. [2023-02-18 13:38:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 13:38:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2023-02-18 13:38:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:23,327 INFO L225 Difference]: With dead ends: 1366 [2023-02-18 13:38:23,327 INFO L226 Difference]: Without dead ends: 1275 [2023-02-18 13:38:23,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:38:23,329 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 351 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 324 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:23,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 2856 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1001 Invalid, 4 Unknown, 0 Unchecked, 15.1s Time] [2023-02-18 13:38:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2023-02-18 13:38:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1174. [2023-02-18 13:38:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 954 states have (on average 1.3878406708595388) internal successors, (1324), 964 states have internal predecessors, (1324), 155 states have call successors, (155), 56 states have call predecessors, (155), 64 states have return successors, (200), 153 states have call predecessors, (200), 150 states have call successors, (200) [2023-02-18 13:38:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1679 transitions. [2023-02-18 13:38:23,461 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1679 transitions. Word has length 121 [2023-02-18 13:38:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:23,462 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1679 transitions. [2023-02-18 13:38:23,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 13:38:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1679 transitions. [2023-02-18 13:38:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-18 13:38:23,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:23,465 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-18 13:38:23,465 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2094696402, now seen corresponding path program 1 times [2023-02-18 13:38:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139569819] [2023-02-18 13:38:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:24,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:38:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:24,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-18 13:38:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:24,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-02-18 13:38:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2023-02-18 13:38:24,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:24,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139569819] [2023-02-18 13:38:24,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139569819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:38:24,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816114963] [2023-02-18 13:38:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:24,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:38:24,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:38:24,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 13:38:24,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 13:38:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 13:38:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:38:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2023-02-18 13:38:25,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:38:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2023-02-18 13:38:25,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816114963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:38:25,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:38:25,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 28 [2023-02-18 13:38:25,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506966805] [2023-02-18 13:38:25,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:38:25,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 13:38:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 13:38:25,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-02-18 13:38:25,547 INFO L87 Difference]: Start difference. First operand 1174 states and 1679 transitions. Second operand has 28 states, 28 states have (on average 5.0) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:38:37,099 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 [] [2023-02-18 13:38:39,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:41,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:42,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:45,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:46,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:47,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:47,952 INFO L93 Difference]: Finished difference Result 2429 states and 3479 transitions. [2023-02-18 13:38:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 13:38:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.0) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 121 [2023-02-18 13:38:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:47,956 INFO L225 Difference]: With dead ends: 2429 [2023-02-18 13:38:47,956 INFO L226 Difference]: Without dead ends: 1278 [2023-02-18 13:38:47,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 225 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=453, Invalid=1029, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 13:38:47,958 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 440 mSDsluCounter, 9535 mSDsCounter, 0 mSdLazyCounter, 3648 mSolverCounterSat, 380 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 10260 SdHoareTripleChecker+Invalid, 4031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 3648 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:47,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 10260 Invalid, 4031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 3648 Invalid, 3 Unknown, 0 Unchecked, 20.9s Time] [2023-02-18 13:38:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2023-02-18 13:38:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1202. [2023-02-18 13:38:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 982 states have (on average 1.3767820773930755) internal successors, (1352), 992 states have internal predecessors, (1352), 155 states have call successors, (155), 56 states have call predecessors, (155), 64 states have return successors, (200), 153 states have call predecessors, (200), 150 states have call successors, (200) [2023-02-18 13:38:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1707 transitions. [2023-02-18 13:38:48,072 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1707 transitions. Word has length 121 [2023-02-18 13:38:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:48,073 INFO L495 AbstractCegarLoop]: Abstraction has 1202 states and 1707 transitions. [2023-02-18 13:38:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.0) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:38:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1707 transitions. [2023-02-18 13:38:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-18 13:38:48,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:48,076 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 11, 11, 11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:48,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 13:38:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-18 13:38:48,293 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1873238602, now seen corresponding path program 2 times [2023-02-18 13:38:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:48,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031519964] [2023-02-18 13:38:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-02-18 13:38:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:49,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-02-18 13:38:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:49,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-02-18 13:38:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2023-02-18 13:38:49,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031519964] [2023-02-18 13:38:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031519964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:38:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127937274] [2023-02-18 13:38:49,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 13:38:49,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:38:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:38:49,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 13:38:49,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 13:38:51,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 13:38:51,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 13:38:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 13:38:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:38:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2023-02-18 13:38:51,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:38:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 253 proven. 242 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-18 13:38:52,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127937274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:38:52,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:38:52,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 26] total 42 [2023-02-18 13:38:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655146875] [2023-02-18 13:38:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:38:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 13:38:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 13:38:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 13:38:52,006 INFO L87 Difference]: Start difference. First operand 1202 states and 1707 transitions. Second operand has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:39:12,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:15,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:18,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:20,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:22,627 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 [] [2023-02-18 13:39:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:22,818 INFO L93 Difference]: Finished difference Result 2485 states and 3536 transitions. [2023-02-18 13:39:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 13:39:22,819 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 149 [2023-02-18 13:39:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:22,823 INFO L225 Difference]: With dead ends: 2485 [2023-02-18 13:39:22,823 INFO L226 Difference]: Without dead ends: 1308 [2023-02-18 13:39:22,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 264 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=553, Invalid=2309, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 13:39:22,826 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 1029 mSDsluCounter, 16979 mSDsCounter, 0 mSdLazyCounter, 7647 mSolverCounterSat, 457 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 17705 SdHoareTripleChecker+Invalid, 8108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 7647 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:22,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 17705 Invalid, 8108 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [457 Valid, 7647 Invalid, 4 Unknown, 0 Unchecked, 28.0s Time] [2023-02-18 13:39:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-02-18 13:39:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1234. [2023-02-18 13:39:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1014 states have (on average 1.3648915187376727) internal successors, (1384), 1024 states have internal predecessors, (1384), 155 states have call successors, (155), 56 states have call predecessors, (155), 64 states have return successors, (200), 153 states have call predecessors, (200), 150 states have call successors, (200) [2023-02-18 13:39:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1739 transitions. [2023-02-18 13:39:22,942 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1739 transitions. Word has length 149 [2023-02-18 13:39:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:22,942 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1739 transitions. [2023-02-18 13:39:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:39:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1739 transitions. [2023-02-18 13:39:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-02-18 13:39:22,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:22,945 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 12, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:22,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 13:39:23,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-18 13:39:23,160 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1777165738, now seen corresponding path program 3 times [2023-02-18 13:39:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746169787] [2023-02-18 13:39:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:24,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-02-18 13:39:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:24,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-02-18 13:39:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:24,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-02-18 13:39:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2023-02-18 13:39:24,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:24,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746169787] [2023-02-18 13:39:24,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746169787] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:39:24,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065160114] [2023-02-18 13:39:24,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 13:39:24,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:39:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:39:24,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 13:39:24,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 13:41:03,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 13:41:03,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 13:41:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 13:41:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:41:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2023-02-18 13:41:03,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:41:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2023-02-18 13:41:04,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065160114] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:41:04,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:41:04,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10, 9] total 45 [2023-02-18 13:41:04,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91510404] [2023-02-18 13:41:04,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:41:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 13:41:04,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:41:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 13:41:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 13:41:04,087 INFO L87 Difference]: Start difference. First operand 1234 states and 1739 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 42 states have internal predecessors, (155), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 13:41:15,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:19,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:21,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:41:21,527 INFO L93 Difference]: Finished difference Result 2670 states and 3808 transitions. [2023-02-18 13:41:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-18 13:41:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 42 states have internal predecessors, (155), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) Word has length 181 [2023-02-18 13:41:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:41:21,532 INFO L225 Difference]: With dead ends: 2670 [2023-02-18 13:41:21,533 INFO L226 Difference]: Without dead ends: 1475 [2023-02-18 13:41:21,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=604, Invalid=4508, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 13:41:21,537 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 434 mSDsluCounter, 6873 mSDsCounter, 0 mSdLazyCounter, 7239 mSolverCounterSat, 376 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 7586 SdHoareTripleChecker+Invalid, 7616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 7239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-02-18 13:41:21,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 7586 Invalid, 7616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 7239 Invalid, 1 Unknown, 0 Unchecked, 15.6s Time] [2023-02-18 13:41:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2023-02-18 13:41:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1378. [2023-02-18 13:41:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1153 states have (on average 1.3772766695576757) internal successors, (1588), 1161 states have internal predecessors, (1588), 155 states have call successors, (155), 63 states have call predecessors, (155), 69 states have return successors, (200), 153 states have call predecessors, (200), 150 states have call successors, (200) [2023-02-18 13:41:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1943 transitions. [2023-02-18 13:41:21,730 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1943 transitions. Word has length 181 [2023-02-18 13:41:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:41:21,730 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 1943 transitions. [2023-02-18 13:41:21,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 42 states have internal predecessors, (155), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 13:41:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1943 transitions. [2023-02-18 13:41:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-18 13:41:21,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:41:21,733 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:41:21,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 13:41:21,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 13:41:21,959 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:41:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:41:21,959 INFO L85 PathProgramCache]: Analyzing trace with hash 264683437, now seen corresponding path program 4 times [2023-02-18 13:41:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:41:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957329172] [2023-02-18 13:41:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:41:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:41:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:23,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-02-18 13:41:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:23,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2023-02-18 13:41:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1930 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2023-02-18 13:41:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:41:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957329172] [2023-02-18 13:41:23,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957329172] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:41:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022755054] [2023-02-18 13:41:23,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 13:41:23,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:41:23,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:41:23,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 13:41:23,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 13:41:24,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 13:41:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 13:41:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 13:41:24,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:41:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1930 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 1460 trivial. 0 not checked. [2023-02-18 13:41:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 13:41:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1930 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2023-02-18 13:41:25,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022755054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 13:41:25,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 13:41:25,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 14] total 54 [2023-02-18 13:41:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611787767] [2023-02-18 13:41:25,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 13:41:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 13:41:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:41:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 13:41:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2612, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 13:41:25,972 INFO L87 Difference]: Start difference. First operand 1378 states and 1943 transitions. Second operand has 54 states, 54 states have (on average 2.8703703703703702) internal successors, (155), 52 states have internal predecessors, (155), 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) [2023-02-18 13:41:56,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:58,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:59,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:04,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:07,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:09,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:42:09,253 INFO L93 Difference]: Finished difference Result 2958 states and 4241 transitions. [2023-02-18 13:42:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 13:42:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.8703703703703702) internal successors, (155), 52 states have internal predecessors, (155), 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 211 [2023-02-18 13:42:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:42:09,258 INFO L225 Difference]: With dead ends: 2958 [2023-02-18 13:42:09,258 INFO L226 Difference]: Without dead ends: 1609 [2023-02-18 13:42:09,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 388 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1395, Invalid=9111, Unknown=0, NotChecked=0, Total=10506 [2023-02-18 13:42:09,262 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 455 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 10493 mSolverCounterSat, 454 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 13064 SdHoareTripleChecker+Invalid, 10952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 10493 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:42:09,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 13064 Invalid, 10952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 10493 Invalid, 5 Unknown, 0 Unchecked, 29.3s Time] [2023-02-18 13:42:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2023-02-18 13:42:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1435. [2023-02-18 13:42:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1210 states have (on average 1.366115702479339) internal successors, (1653), 1218 states have internal predecessors, (1653), 154 states have call successors, (154), 64 states have call predecessors, (154), 70 states have return successors, (197), 152 states have call predecessors, (197), 149 states have call successors, (197) [2023-02-18 13:42:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 2004 transitions. [2023-02-18 13:42:09,438 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 2004 transitions. Word has length 211 [2023-02-18 13:42:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:42:09,439 INFO L495 AbstractCegarLoop]: Abstraction has 1435 states and 2004 transitions. [2023-02-18 13:42:09,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.8703703703703702) internal successors, (155), 52 states have internal predecessors, (155), 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) [2023-02-18 13:42:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 2004 transitions. [2023-02-18 13:42:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-02-18 13:42:09,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:42:09,442 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:42:09,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 13:42:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 13:42:09,657 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:42:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:42:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1068453200, now seen corresponding path program 1 times [2023-02-18 13:42:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:42:09,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094778839] [2023-02-18 13:42:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:42:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:42:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:09,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-02-18 13:42:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:10,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:42:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:10,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 13:42:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:10,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-18 13:42:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:10,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:42:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2023-02-18 13:42:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:42:10,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094778839] [2023-02-18 13:42:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094778839] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:42:10,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:42:10,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:42:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331880043] [2023-02-18 13:42:10,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:42:10,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:42:10,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:42:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:42:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:42:10,070 INFO L87 Difference]: Start difference. First operand 1435 states and 2004 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 13:42:13,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:15,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:18,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:20,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:42:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:42:20,682 INFO L93 Difference]: Finished difference Result 2025 states and 2836 transitions. [2023-02-18 13:42:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:42:20,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 223 [2023-02-18 13:42:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:42:20,688 INFO L225 Difference]: With dead ends: 2025 [2023-02-18 13:42:20,688 INFO L226 Difference]: Without dead ends: 1429 [2023-02-18 13:42:20,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:42:20,689 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 410 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 397 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:42:20,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 2288 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 731 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2023-02-18 13:42:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2023-02-18 13:42:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1365. [2023-02-18 13:42:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1153 states have (on average 1.3677363399826539) internal successors, (1577), 1160 states have internal predecessors, (1577), 148 states have call successors, (148), 59 states have call predecessors, (148), 63 states have return successors, (186), 145 states have call predecessors, (186), 143 states have call successors, (186) [2023-02-18 13:42:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1911 transitions. [2023-02-18 13:42:20,895 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1911 transitions. Word has length 223 [2023-02-18 13:42:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:42:20,895 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 1911 transitions. [2023-02-18 13:42:20,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 13:42:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1911 transitions. [2023-02-18 13:42:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-02-18 13:42:20,898 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:42:20,898 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:42:20,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-18 13:42:20,898 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:42:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:42:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1791591321, now seen corresponding path program 5 times [2023-02-18 13:42:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:42:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958862096] [2023-02-18 13:42:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:42:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:42:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:22,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2023-02-18 13:42:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:22,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2023-02-18 13:42:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:42:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2023-02-18 13:42:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:42:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958862096] [2023-02-18 13:42:22,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958862096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:42:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681154458] [2023-02-18 13:42:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 13:42:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:42:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:42:22,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 13:42:22,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process