./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-2.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 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:20:32,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:20:32,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:20:32,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:20:32,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:20:32,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:20:32,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:20:32,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:20:32,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:20:32,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:20:32,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:20:32,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:20:32,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:20:32,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:20:32,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:20:32,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:20:32,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:20:32,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:20:32,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:20:32,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:20:32,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:20:32,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:20:32,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:20:32,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:20:32,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:20:32,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:20:32,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:20:32,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:20:32,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:20:32,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:20:32,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:20:32,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:20:32,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:20:32,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:20:32,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:20:32,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:20:32,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:20:32,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:20:32,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:20:32,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:20:32,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:20:32,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:20:32,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:20:32,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:20:32,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:20:32,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:20:32,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:20:32,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:20:32,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:20:32,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:20:32,953 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:20:32,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:20:32,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:20:32,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:20:32,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:20:32,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:20:32,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:20:32,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:20:32,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:20:32,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:20:32,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:20:32,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:20:32,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:20:32,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:20:32,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:20:32,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:20:32,956 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:20:32,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:20:32,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:20:32,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:20:32,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 [2021-12-21 10:20:33,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:20:33,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:20:33,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:20:33,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:20:33,120 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:20:33,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2021-12-21 10:20:33,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04eaed9ed/6a69d893171f4bc1903606d13b3ab97f/FLAGb35cabb0e [2021-12-21 10:20:33,739 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:20:33,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2021-12-21 10:20:33,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04eaed9ed/6a69d893171f4bc1903606d13b3ab97f/FLAGb35cabb0e [2021-12-21 10:20:34,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04eaed9ed/6a69d893171f4bc1903606d13b3ab97f [2021-12-21 10:20:34,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:20:34,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:20:34,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:20:34,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:20:34,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:20:34,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:20:34" (1/1) ... [2021-12-21 10:20:34,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f76ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:34, skipping insertion in model container [2021-12-21 10:20:34,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:20:34" (1/1) ... [2021-12-21 10:20:34,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:20:34,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:20:34,826 WARN L230 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-2.c[90200,90213] [2021-12-21 10:20:35,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:20:35,363 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:20:35,414 WARN L230 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-2.c[90200,90213] [2021-12-21 10:20:35,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:20:35,649 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:20:35,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35 WrapperNode [2021-12-21 10:20:35,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:20:35,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:20:35,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:20:35,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:20:35,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,835 INFO L137 Inliner]: procedures = 121, calls = 2189, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2294 [2021-12-21 10:20:35,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:20:35,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:20:35,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:20:35,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:20:35,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:20:35,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:20:35,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:20:35,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:20:35,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (1/1) ... [2021-12-21 10:20:35,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:20:36,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:20:36,033 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) [2021-12-21 10:20:36,055 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 [2021-12-21 10:20:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 10:20:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 10:20:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 10:20:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:20:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-21 10:20:36,073 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-21 10:20:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-21 10:20:36,073 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-21 10:20:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:20:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-21 10:20:36,073 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-21 10:20:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-21 10:20:36,073 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-21 10:20:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-21 10:20:36,074 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-21 10:20:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 10:20:36,074 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 10:20:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-21 10:20:36,074 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-21 10:20:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-21 10:20:36,074 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-21 10:20:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:20:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-21 10:20:36,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-21 10:20:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-21 10:20:36,075 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-21 10:20:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-21 10:20:36,076 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-21 10:20:36,076 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-21 10:20:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-21 10:20:36,077 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-21 10:20:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:20:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-21 10:20:36,077 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-21 10:20:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-21 10:20:36,077 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-21 10:20:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-21 10:20:36,078 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-21 10:20:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:20:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-21 10:20:36,078 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-21 10:20:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 10:20:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-21 10:20:36,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-21 10:20:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:20:36,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:20:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-21 10:20:36,079 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-21 10:20:36,420 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:20:36,422 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:20:36,568 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:36,580 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-21 10:20:36,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-21 10:20:37,063 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:37,084 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-21 10:20:37,084 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-21 10:20:37,099 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:37,100 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:37,101 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:37,112 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:37,126 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:37,131 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:46,661 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2021-12-21 10:20:46,661 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##485: assume false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##486: assume !false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##154: assume !false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##153: assume false; [2021-12-21 10:20:46,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-21 10:20:46,692 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:20:46,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-21 10:20:46,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-21 10:20:46,707 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:20:46,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:20:46,721 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 10:20:46,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:20:46 BoogieIcfgContainer [2021-12-21 10:20:46,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:20:46,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:20:46,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:20:46,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:20:46,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:20:34" (1/3) ... [2021-12-21 10:20:46,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c80427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:20:46, skipping insertion in model container [2021-12-21 10:20:46,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:20:35" (2/3) ... [2021-12-21 10:20:46,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c80427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:20:46, skipping insertion in model container [2021-12-21 10:20:46,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:20:46" (3/3) ... [2021-12-21 10:20:46,729 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-2.c [2021-12-21 10:20:46,733 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:20:46,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:20:46,780 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:20:46,793 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:20:46,794 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:20:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 609 states, 475 states have (on average 1.5178947368421052) internal successors, (721), 494 states have internal predecessors, (721), 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) [2021-12-21 10:20:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:20:46,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:46,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:20:46,828 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -969455066, now seen corresponding path program 1 times [2021-12-21 10:20:46,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:46,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644664000] [2021-12-21 10:20:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:46,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:47,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644664000] [2021-12-21 10:20:47,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644664000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:47,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:47,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:20:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507289519] [2021-12-21 10:20:47,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:47,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:20:47,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:47,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:20:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:20:47,324 INFO L87 Difference]: Start difference. First operand has 609 states, 475 states have (on average 1.5178947368421052) internal successors, (721), 494 states have internal predecessors, (721), 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 10:20:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:20:47,647 INFO L93 Difference]: Finished difference Result 1078 states and 1705 transitions. [2021-12-21 10:20:47,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:20:47,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2021-12-21 10:20:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:20:47,663 INFO L225 Difference]: With dead ends: 1078 [2021-12-21 10:20:47,663 INFO L226 Difference]: Without dead ends: 602 [2021-12-21 10:20:47,669 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:20:47,683 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 8 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:20:47,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1787 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:20:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-21 10:20:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-12-21 10:20:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 470 states have (on average 1.4872340425531916) internal successors, (699), 487 states have internal predecessors, (699), 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) [2021-12-21 10:20:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 909 transitions. [2021-12-21 10:20:47,752 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 909 transitions. Word has length 13 [2021-12-21 10:20:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:20:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 909 transitions. [2021-12-21 10:20:47,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 10:20:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 909 transitions. [2021-12-21 10:20:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:20:47,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:47,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:20:47,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:20:47,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash 55674269, now seen corresponding path program 1 times [2021-12-21 10:20:47,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:47,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948440825] [2021-12-21 10:20:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:47,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:47,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:47,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948440825] [2021-12-21 10:20:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948440825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:47,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:47,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:20:47,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399922358] [2021-12-21 10:20:47,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:47,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:20:47,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:20:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:20:47,839 INFO L87 Difference]: Start difference. First operand 602 states and 909 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-12-21 10:20:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:20:48,000 INFO L93 Difference]: Finished difference Result 1117 states and 1672 transitions. [2021-12-21 10:20:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:20:48,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2021-12-21 10:20:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:20:48,006 INFO L225 Difference]: With dead ends: 1117 [2021-12-21 10:20:48,009 INFO L226 Difference]: Without dead ends: 875 [2021-12-21 10:20:48,010 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:20:48,011 INFO L933 BasicCegarLoop]: 1230 mSDtfsCounter, 823 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1645 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 [2021-12-21 10:20:48,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1645 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:20:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-12-21 10:20:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 855. [2021-12-21 10:20:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 680 states have (on average 1.4661764705882352) internal successors, (997), 683 states have internal predecessors, (997), 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) [2021-12-21 10:20:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1285 transitions. [2021-12-21 10:20:48,067 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1285 transitions. Word has length 15 [2021-12-21 10:20:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:20:48,068 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1285 transitions. [2021-12-21 10:20:48,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-12-21 10:20:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1285 transitions. [2021-12-21 10:20:48,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:20:48,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:48,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:20:48,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:20:48,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1471184401, now seen corresponding path program 1 times [2021-12-21 10:20:48,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:48,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150580777] [2021-12-21 10:20:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:48,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:48,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150580777] [2021-12-21 10:20:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150580777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:48,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:48,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:20:48,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320097186] [2021-12-21 10:20:48,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:48,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:20:48,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:20:48,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:20:48,168 INFO L87 Difference]: Start difference. First operand 855 states and 1285 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-21 10:20:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:20:48,304 INFO L93 Difference]: Finished difference Result 1817 states and 2794 transitions. [2021-12-21 10:20:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:20:48,305 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), 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 22 [2021-12-21 10:20:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:20:48,316 INFO L225 Difference]: With dead ends: 1817 [2021-12-21 10:20:48,316 INFO L226 Difference]: Without dead ends: 1421 [2021-12-21 10:20:48,317 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:20:48,322 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 576 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 2267 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 [2021-12-21 10:20:48,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 2267 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:20:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-12-21 10:20:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1018. [2021-12-21 10:20:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 801 states have (on average 1.4544319600499376) internal successors, (1165), 803 states have internal predecessors, (1165), 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) [2021-12-21 10:20:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1552 transitions. [2021-12-21 10:20:48,378 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1552 transitions. Word has length 22 [2021-12-21 10:20:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:20:48,378 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1552 transitions. [2021-12-21 10:20:48,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-21 10:20:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1552 transitions. [2021-12-21 10:20:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:20:48,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:48,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:20:48,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:20:48,380 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash 696545090, now seen corresponding path program 1 times [2021-12-21 10:20:48,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:48,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343017260] [2021-12-21 10:20:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:48,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:48,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:48,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343017260] [2021-12-21 10:20:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343017260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:48,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:48,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:20:48,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43641417] [2021-12-21 10:20:48,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:48,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:20:48,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:20:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:20:48,469 INFO L87 Difference]: Start difference. First operand 1018 states and 1552 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, (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) [2021-12-21 10:20:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:20:48,548 INFO L93 Difference]: Finished difference Result 1664 states and 2490 transitions. [2021-12-21 10:20:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:20:48,548 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, (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 22 [2021-12-21 10:20:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:20:48,553 INFO L225 Difference]: With dead ends: 1664 [2021-12-21 10:20:48,553 INFO L226 Difference]: Without dead ends: 1531 [2021-12-21 10:20:48,554 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:20:48,554 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 826 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1542 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 [2021-12-21 10:20:48,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1542 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:20:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-12-21 10:20:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1469. [2021-12-21 10:20:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1165 states have (on average 1.4583690987124462) internal successors, (1699), 1163 states have internal predecessors, (1699), 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) [2021-12-21 10:20:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2224 transitions. [2021-12-21 10:20:48,589 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2224 transitions. Word has length 22 [2021-12-21 10:20:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:20:48,589 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 2224 transitions. [2021-12-21 10:20:48,590 INFO L471 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, (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) [2021-12-21 10:20:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2224 transitions. [2021-12-21 10:20:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 10:20:48,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:48,591 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:20:48,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:20:48,591 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1398900519, now seen corresponding path program 1 times [2021-12-21 10:20:48,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987513136] [2021-12-21 10:20:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:48,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:48,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:48,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987513136] [2021-12-21 10:20:48,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987513136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:48,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:48,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:20:48,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784189465] [2021-12-21 10:20:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:48,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:20:48,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:48,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:20:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:20:48,658 INFO L87 Difference]: Start difference. First operand 1469 states and 2224 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-12-21 10:20:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:20:49,237 INFO L93 Difference]: Finished difference Result 2648 states and 4038 transitions. [2021-12-21 10:20:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:20:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 23 [2021-12-21 10:20:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:20:49,260 INFO L225 Difference]: With dead ends: 2648 [2021-12-21 10:20:49,260 INFO L226 Difference]: Without dead ends: 1768 [2021-12-21 10:20:49,264 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:20:49,266 INFO L933 BasicCegarLoop]: 1154 mSDtfsCounter, 1410 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:20:49,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 1443 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:20:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-12-21 10:20:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1457. [2021-12-21 10:20:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1155 states have (on average 1.4554112554112555) internal successors, (1681), 1153 states have internal predecessors, (1681), 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) [2021-12-21 10:20:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2200 transitions. [2021-12-21 10:20:49,346 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2200 transitions. Word has length 23 [2021-12-21 10:20:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:20:49,346 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 2200 transitions. [2021-12-21 10:20:49,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-12-21 10:20:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2200 transitions. [2021-12-21 10:20:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:20:49,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:49,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:20:49,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:20:49,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash -579948273, now seen corresponding path program 1 times [2021-12-21 10:20:49,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:49,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570425411] [2021-12-21 10:20:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:49,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:49,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570425411] [2021-12-21 10:20:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570425411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:49,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:49,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:20:49,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479474161] [2021-12-21 10:20:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:49,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:20:49,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:20:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:20:49,469 INFO L87 Difference]: Start difference. First operand 1457 states and 2200 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-12-21 10:20:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:20:49,575 INFO L93 Difference]: Finished difference Result 1460 states and 2202 transitions. [2021-12-21 10:20:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:20:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 22 [2021-12-21 10:20:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:20:49,584 INFO L225 Difference]: With dead ends: 1460 [2021-12-21 10:20:49,584 INFO L226 Difference]: Without dead ends: 1456 [2021-12-21 10:20:49,585 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:20:49,586 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 22 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:20:49,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1691 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:20:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-12-21 10:20:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2021-12-21 10:20:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1155 states have (on average 1.4536796536796537) internal successors, (1679), 1152 states have internal predecessors, (1679), 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) [2021-12-21 10:20:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2197 transitions. [2021-12-21 10:20:49,658 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2197 transitions. Word has length 22 [2021-12-21 10:20:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:20:49,658 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 2197 transitions. [2021-12-21 10:20:49,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-12-21 10:20:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2197 transitions. [2021-12-21 10:20:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:20:49,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:20:49,676 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:20:49,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:20:49,679 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:20:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:20:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash -550873607, now seen corresponding path program 1 times [2021-12-21 10:20:49,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:20:49,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358540169] [2021-12-21 10:20:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:20:49,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:20:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:49,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:20:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:20:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:20:49,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:20:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358540169] [2021-12-21 10:20:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358540169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:20:49,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:20:49,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:20:49,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024519894] [2021-12-21 10:20:49,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:20:49,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:20:49,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:20:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:20:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:20:49,800 INFO L87 Difference]: Start difference. First operand 1456 states and 2197 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-12-21 10:20:54,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:20:57,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:20:59,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:01,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:02,046 INFO L93 Difference]: Finished difference Result 2255 states and 3351 transitions. [2021-12-21 10:21:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:21:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2021-12-21 10:21:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:02,053 INFO L225 Difference]: With dead ends: 2255 [2021-12-21 10:21:02,053 INFO L226 Difference]: Without dead ends: 1233 [2021-12-21 10:21:02,055 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:02,055 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 713 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 275 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:02,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 2600 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 456 Invalid, 2 Unknown, 0 Unchecked, 12.2s Time] [2021-12-21 10:21:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-21 10:21:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1089. [2021-12-21 10:21:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 864 states have (on average 1.431712962962963) internal successors, (1237), 863 states have internal predecessors, (1237), 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) [2021-12-21 10:21:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1615 transitions. [2021-12-21 10:21:02,123 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1615 transitions. Word has length 35 [2021-12-21 10:21:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:02,125 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1615 transitions. [2021-12-21 10:21:02,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-12-21 10:21:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1615 transitions. [2021-12-21 10:21:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 10:21:02,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:02,128 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:02,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:21:02,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash 947230743, now seen corresponding path program 1 times [2021-12-21 10:21:02,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:02,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528160221] [2021-12-21 10:21:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:02,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:02,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528160221] [2021-12-21 10:21:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528160221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:02,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:02,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:02,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109247544] [2021-12-21 10:21:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:02,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:02,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:02,200 INFO L87 Difference]: Start difference. First operand 1089 states and 1615 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-12-21 10:21:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:02,533 INFO L93 Difference]: Finished difference Result 1152 states and 1697 transitions. [2021-12-21 10:21:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 31 [2021-12-21 10:21:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:02,538 INFO L225 Difference]: With dead ends: 1152 [2021-12-21 10:21:02,539 INFO L226 Difference]: Without dead ends: 1107 [2021-12-21 10:21:02,539 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:02,540 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 914 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:02,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 1493 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:21:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-12-21 10:21:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1089. [2021-12-21 10:21:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 864 states have (on average 1.4293981481481481) internal successors, (1235), 863 states have internal predecessors, (1235), 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) [2021-12-21 10:21:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1613 transitions. [2021-12-21 10:21:02,569 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1613 transitions. Word has length 31 [2021-12-21 10:21:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:02,570 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1613 transitions. [2021-12-21 10:21:02,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-12-21 10:21:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1613 transitions. [2021-12-21 10:21:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 10:21:02,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:02,572 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:02,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:21:02,572 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2120850198, now seen corresponding path program 1 times [2021-12-21 10:21:02,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:02,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374982580] [2021-12-21 10:21:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:02,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:02,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:21:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:02,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374982580] [2021-12-21 10:21:02,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374982580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:02,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:02,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:02,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497826267] [2021-12-21 10:21:02,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:02,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:02,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:02,666 INFO L87 Difference]: Start difference. First operand 1089 states and 1613 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-21 10:21:06,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:09,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:10,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:12,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:14,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:15,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:15,918 INFO L93 Difference]: Finished difference Result 1754 states and 2605 transitions. [2021-12-21 10:21:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 36 [2021-12-21 10:21:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:15,926 INFO L225 Difference]: With dead ends: 1754 [2021-12-21 10:21:15,926 INFO L226 Difference]: Without dead ends: 1145 [2021-12-21 10:21:15,933 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:15,934 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 915 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 136 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:15,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 1246 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 321 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2021-12-21 10:21:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-21 10:21:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1086. [2021-12-21 10:21:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 862 states have (on average 1.4211136890951277) internal successors, (1225), 860 states have internal predecessors, (1225), 162 states have call successors, (162), 55 states have call predecessors, (162), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-21 10:21:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1602 transitions. [2021-12-21 10:21:16,022 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1602 transitions. Word has length 36 [2021-12-21 10:21:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1602 transitions. [2021-12-21 10:21:16,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-21 10:21:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1602 transitions. [2021-12-21 10:21:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 10:21:16,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:16,025 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:16,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:21:16,025 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1333744366, now seen corresponding path program 1 times [2021-12-21 10:21:16,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:16,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253734848] [2021-12-21 10:21:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:16,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:16,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253734848] [2021-12-21 10:21:16,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253734848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:16,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:16,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:21:16,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789323441] [2021-12-21 10:21:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:16,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:21:16,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:21:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:21:16,097 INFO L87 Difference]: Start difference. First operand 1086 states and 1602 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-21 10:21:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:16,139 INFO L93 Difference]: Finished difference Result 1101 states and 1622 transitions. [2021-12-21 10:21:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:21:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 33 [2021-12-21 10:21:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:16,145 INFO L225 Difference]: With dead ends: 1101 [2021-12-21 10:21:16,145 INFO L226 Difference]: Without dead ends: 1082 [2021-12-21 10:21:16,145 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:16,146 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:16,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 861 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:21:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-12-21 10:21:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1055. [2021-12-21 10:21:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 834 states have (on average 1.4304556354916067) internal successors, (1193), 839 states have internal predecessors, (1193), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (206), 160 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-21 10:21:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1560 transitions. [2021-12-21 10:21:16,178 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1560 transitions. Word has length 33 [2021-12-21 10:21:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:16,179 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1560 transitions. [2021-12-21 10:21:16,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-21 10:21:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1560 transitions. [2021-12-21 10:21:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 10:21:16,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:16,181 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:16,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:21:16,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1348089275, now seen corresponding path program 1 times [2021-12-21 10:21:16,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:16,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209681403] [2021-12-21 10:21:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:16,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:16,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209681403] [2021-12-21 10:21:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209681403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:16,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:16,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:21:16,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355642756] [2021-12-21 10:21:16,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:16,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:21:16,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:21:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:21:16,233 INFO L87 Difference]: Start difference. First operand 1055 states and 1560 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-21 10:21:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:16,311 INFO L93 Difference]: Finished difference Result 1353 states and 1993 transitions. [2021-12-21 10:21:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:21:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 33 [2021-12-21 10:21:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:16,317 INFO L225 Difference]: With dead ends: 1353 [2021-12-21 10:21:16,317 INFO L226 Difference]: Without dead ends: 1342 [2021-12-21 10:21:16,318 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:16,319 INFO L933 BasicCegarLoop]: 1162 mSDtfsCounter, 337 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1986 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 [2021-12-21 10:21:16,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1986 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:21:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-21 10:21:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1089. [2021-12-21 10:21:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 865 states have (on average 1.416184971098266) internal successors, (1225), 863 states have internal predecessors, (1225), 161 states have call successors, (161), 55 states have call predecessors, (161), 62 states have return successors, (216), 170 states have call predecessors, (216), 155 states have call successors, (216) [2021-12-21 10:21:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1602 transitions. [2021-12-21 10:21:16,355 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1602 transitions. Word has length 33 [2021-12-21 10:21:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:16,355 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1602 transitions. [2021-12-21 10:21:16,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-21 10:21:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1602 transitions. [2021-12-21 10:21:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 10:21:16,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:16,357 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:16,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:21:16,357 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1785217405, now seen corresponding path program 1 times [2021-12-21 10:21:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:16,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459966654] [2021-12-21 10:21:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:16,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:16,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459966654] [2021-12-21 10:21:16,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459966654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:16,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:16,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:16,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430697138] [2021-12-21 10:21:16,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:16,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:16,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:16,415 INFO L87 Difference]: Start difference. First operand 1089 states and 1602 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-12-21 10:21:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:16,721 INFO L93 Difference]: Finished difference Result 1118 states and 1633 transitions. [2021-12-21 10:21:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 33 [2021-12-21 10:21:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:16,726 INFO L225 Difference]: With dead ends: 1118 [2021-12-21 10:21:16,726 INFO L226 Difference]: Without dead ends: 1072 [2021-12-21 10:21:16,727 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:16,728 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 879 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:16,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1469 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:21:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-21 10:21:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1060. [2021-12-21 10:21:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 839 states have (on average 1.4219308700834326) internal successors, (1193), 843 states have internal predecessors, (1193), 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) [2021-12-21 10:21:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1559 transitions. [2021-12-21 10:21:16,804 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1559 transitions. Word has length 33 [2021-12-21 10:21:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:16,805 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1559 transitions. [2021-12-21 10:21:16,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-12-21 10:21:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1559 transitions. [2021-12-21 10:21:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:21:16,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:16,806 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:16,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:21:16,806 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1611974706, now seen corresponding path program 1 times [2021-12-21 10:21:16,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:16,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916496811] [2021-12-21 10:21:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:16,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:16,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:16,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916496811] [2021-12-21 10:21:16,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916496811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:16,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:16,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:16,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649448608] [2021-12-21 10:21:16,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:16,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:16,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:16,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:16,864 INFO L87 Difference]: Start difference. First operand 1060 states and 1559 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-12-21 10:21:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:17,266 INFO L93 Difference]: Finished difference Result 1313 states and 1935 transitions. [2021-12-21 10:21:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 34 [2021-12-21 10:21:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:17,272 INFO L225 Difference]: With dead ends: 1313 [2021-12-21 10:21:17,272 INFO L226 Difference]: Without dead ends: 1309 [2021-12-21 10:21:17,272 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:17,273 INFO L933 BasicCegarLoop]: 1152 mSDtfsCounter, 1111 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:17,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 1767 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:21:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-21 10:21:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1062. [2021-12-21 10:21:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 841 states have (on average 1.4209274673008323) internal successors, (1195), 845 states have internal predecessors, (1195), 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) [2021-12-21 10:21:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1561 transitions. [2021-12-21 10:21:17,310 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1561 transitions. Word has length 34 [2021-12-21 10:21:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:17,311 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1561 transitions. [2021-12-21 10:21:17,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-12-21 10:21:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1561 transitions. [2021-12-21 10:21:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:21:17,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:17,312 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:17,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:21:17,313 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1612251536, now seen corresponding path program 1 times [2021-12-21 10:21:17,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:17,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791658734] [2021-12-21 10:21:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:17,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:17,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791658734] [2021-12-21 10:21:17,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791658734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:17,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:17,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:21:17,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416984188] [2021-12-21 10:21:17,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:17,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:21:17,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:21:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:21:17,381 INFO L87 Difference]: Start difference. First operand 1062 states and 1561 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2021-12-21 10:21:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:17,475 INFO L93 Difference]: Finished difference Result 1074 states and 1573 transitions. [2021-12-21 10:21:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:21:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 34 [2021-12-21 10:21:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:17,479 INFO L225 Difference]: With dead ends: 1074 [2021-12-21 10:21:17,479 INFO L226 Difference]: Without dead ends: 1046 [2021-12-21 10:21:17,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:21:17,480 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 34 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4238 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 [2021-12-21 10:21:17,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 4238 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:21:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-12-21 10:21:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1046. [2021-12-21 10:21:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 825 states have (on average 1.4254545454545455) internal successors, (1176), 829 states have internal predecessors, (1176), 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) [2021-12-21 10:21:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1542 transitions. [2021-12-21 10:21:17,517 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1542 transitions. Word has length 34 [2021-12-21 10:21:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:17,517 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1542 transitions. [2021-12-21 10:21:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2021-12-21 10:21:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1542 transitions. [2021-12-21 10:21:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:21:17,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:17,518 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:17,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:21:17,519 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1360772428, now seen corresponding path program 1 times [2021-12-21 10:21:17,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:17,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353679746] [2021-12-21 10:21:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:17,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:17,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:21:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:17,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 10:21:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:17,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353679746] [2021-12-21 10:21:17,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353679746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:17,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:17,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:21:17,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841870230] [2021-12-21 10:21:17,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:17,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:21:17,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:17,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:21:17,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:21:17,602 INFO L87 Difference]: Start difference. First operand 1046 states and 1542 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-12-21 10:21:21,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:23,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:25,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:27,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:28,437 INFO L93 Difference]: Finished difference Result 1714 states and 2541 transitions. [2021-12-21 10:21:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:21:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 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 43 [2021-12-21 10:21:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:28,445 INFO L225 Difference]: With dead ends: 1714 [2021-12-21 10:21:28,445 INFO L226 Difference]: Without dead ends: 1178 [2021-12-21 10:21:28,446 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:28,446 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 567 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 258 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:28,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 2367 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 580 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2021-12-21 10:21:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-21 10:21:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1013. [2021-12-21 10:21:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 800 states have (on average 1.425) internal successors, (1140), 807 states have internal predecessors, (1140), 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) [2021-12-21 10:21:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1508 transitions. [2021-12-21 10:21:28,494 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1508 transitions. Word has length 43 [2021-12-21 10:21:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:28,494 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1508 transitions. [2021-12-21 10:21:28,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-12-21 10:21:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1508 transitions. [2021-12-21 10:21:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:21:28,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:28,495 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:21:28,496 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681463, now seen corresponding path program 1 times [2021-12-21 10:21:28,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:28,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237313348] [2021-12-21 10:21:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:28,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:28,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 10:21:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:28,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 10:21:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:28,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:28,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237313348] [2021-12-21 10:21:28,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237313348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:28,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:28,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:21:28,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864119877] [2021-12-21 10:21:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:28,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:21:28,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:21:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:21:28,572 INFO L87 Difference]: Start difference. First operand 1013 states and 1508 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-12-21 10:21:31,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:33,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:35,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:39,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:41,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:21:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:42,256 INFO L93 Difference]: Finished difference Result 1095 states and 1641 transitions. [2021-12-21 10:21:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:21:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 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 43 [2021-12-21 10:21:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:42,263 INFO L225 Difference]: With dead ends: 1095 [2021-12-21 10:21:42,263 INFO L226 Difference]: Without dead ends: 1088 [2021-12-21 10:21:42,264 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:21:42,264 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 251 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 241 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:42,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 2361 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 658 Invalid, 2 Unknown, 0 Unchecked, 13.6s Time] [2021-12-21 10:21:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-12-21 10:21:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1025. [2021-12-21 10:21:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 812 states have (on average 1.4211822660098523) internal successors, (1154), 819 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) [2021-12-21 10:21:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1522 transitions. [2021-12-21 10:21:42,301 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1522 transitions. Word has length 43 [2021-12-21 10:21:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:42,302 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1522 transitions. [2021-12-21 10:21:42,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-12-21 10:21:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1522 transitions. [2021-12-21 10:21:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:21:42,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:42,303 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:42,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:21:42,303 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 436620093, now seen corresponding path program 1 times [2021-12-21 10:21:42,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:42,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192392475] [2021-12-21 10:21:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:42,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:42,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:21:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:21:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:42,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:42,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192392475] [2021-12-21 10:21:42,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192392475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:42,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:42,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:21:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563825734] [2021-12-21 10:21:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:42,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:21:42,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:21:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:21:42,382 INFO L87 Difference]: Start difference. First operand 1025 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 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)