./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-17 02:54:24,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:54:24,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:54:24,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:54:24,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:54:24,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:54:24,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:54:24,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:54:24,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:54:24,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:54:24,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:54:24,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:54:24,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:54:24,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:54:24,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:54:24,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:54:24,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:54:24,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:54:24,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:54:24,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:54:24,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:54:24,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:54:24,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:54:24,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:54:24,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:54:24,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:54:24,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:54:24,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:54:24,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:54:24,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:54:24,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:54:24,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:54:24,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:54:24,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:54:24,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:54:24,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:54:24,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:54:24,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:54:24,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:54:24,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:54:24,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:54:24,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:54:24,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:54:24,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:54:24,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:54:24,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:54:24,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:54:24,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:54:24,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:54:24,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:54:24,720 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:54:24,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:54:24,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:54:24,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:54:24,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:54:24,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:54:24,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:54:24,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:54:24,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:54:24,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:54:24,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:54:24,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:54:24,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:54:24,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:54:24,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:54:24,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:54:24,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:54:24,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:54:24,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:54:24,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 [2021-12-17 02:54:25,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:54:25,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:54:25,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:54:25,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:54:25,076 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:54:25,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2021-12-17 02:54:25,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c22de8ea/ae43ce92183f4a6f9a6cf497234667b5/FLAGdda517bb6 [2021-12-17 02:54:26,080 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:54:26,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2021-12-17 02:54:26,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c22de8ea/ae43ce92183f4a6f9a6cf497234667b5/FLAGdda517bb6 [2021-12-17 02:54:26,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c22de8ea/ae43ce92183f4a6f9a6cf497234667b5 [2021-12-17 02:54:26,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:54:26,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:54:26,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:54:26,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:54:26,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:54:26,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:54:26" (1/1) ... [2021-12-17 02:54:26,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f82b92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:26, skipping insertion in model container [2021-12-17 02:54:26,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:54:26" (1/1) ... [2021-12-17 02:54:26,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:54:26,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:54:26,677 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] [2021-12-17 02:54:27,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:54:27,206 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:54:27,276 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] [2021-12-17 02:54:27,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:54:27,603 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:54:27,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27 WrapperNode [2021-12-17 02:54:27,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:54:27,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:54:27,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:54:27,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:54:27,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,766 INFO L137 Inliner]: procedures = 121, calls = 2189, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2294 [2021-12-17 02:54:27,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:54:27,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:54:27,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:54:27,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:54:27,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:54:27,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:54:27,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:54:27,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:54:27,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (1/1) ... [2021-12-17 02:54:27,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:54:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:54:27,985 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) [2021-12-17 02:54:28,007 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 [2021-12-17 02:54:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-17 02:54:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-17 02:54:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-17 02:54:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 02:54:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-17 02:54:28,032 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-17 02:54:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-17 02:54:28,032 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-17 02:54:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 02:54:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-17 02:54:28,032 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-17 02:54:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-17 02:54:28,033 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-17 02:54:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-17 02:54:28,033 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-17 02:54:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-17 02:54:28,033 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-17 02:54:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-17 02:54:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-17 02:54:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-17 02:54:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-17 02:54:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 02:54:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-17 02:54:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-17 02:54:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-17 02:54:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-17 02:54:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:54:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 02:54:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 02:54:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-17 02:54:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-17 02:54:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-17 02:54:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 02:54:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-17 02:54:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-17 02:54:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-17 02:54:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-17 02:54:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 02:54:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-17 02:54:28,037 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-17 02:54:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-17 02:54:28,037 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-17 02:54:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-17 02:54:28,037 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-17 02:54:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:54:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-17 02:54:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-17 02:54:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-17 02:54:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-17 02:54:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-17 02:54:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:54:28,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:54:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-17 02:54:28,039 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-17 02:54:28,504 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:54:28,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:54:28,713 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:28,735 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-17 02:54:28,735 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-17 02:54:29,213 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:29,233 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-17 02:54:29,234 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-17 02:54:29,247 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:29,248 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:29,249 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:29,254 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:29,260 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:29,265 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##485: assume false; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##486: assume !false; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-12-17 02:54:42,141 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-12-17 02:54:42,142 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-12-17 02:54:42,142 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-17 02:54:42,142 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##154: assume !false; [2021-12-17 02:54:42,142 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##153: assume false; [2021-12-17 02:54:42,142 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-17 02:54:42,174 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:42,177 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-17 02:54:42,177 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-17 02:54:42,192 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:54:42,212 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:54:42,212 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 02:54:42,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:54:42 BoogieIcfgContainer [2021-12-17 02:54:42,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:54:42,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:54:42,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:54:42,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:54:42,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:54:26" (1/3) ... [2021-12-17 02:54:42,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15070cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:54:42, skipping insertion in model container [2021-12-17 02:54:42,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:27" (2/3) ... [2021-12-17 02:54:42,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15070cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:54:42, skipping insertion in model container [2021-12-17 02:54:42,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:54:42" (3/3) ... [2021-12-17 02:54:42,223 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-2.c [2021-12-17 02:54:42,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:54:42,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:54:42,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:54:42,278 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 [2021-12-17 02:54:42,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:54:42,308 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) [2021-12-17 02:54:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 02:54:42,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:42,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:54:42,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash -969455066, now seen corresponding path program 1 times [2021-12-17 02:54:42,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:42,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480318705] [2021-12-17 02:54:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:42,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:42,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480318705] [2021-12-17 02:54:42,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480318705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:42,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:42,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:54:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651335021] [2021-12-17 02:54:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:42,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:54:42,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:54:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:54:42,713 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) [2021-12-17 02:54:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:42,899 INFO L93 Difference]: Finished difference Result 1078 states and 1705 transitions. [2021-12-17 02:54:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:54:42,901 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 [2021-12-17 02:54:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:42,913 INFO L225 Difference]: With dead ends: 1078 [2021-12-17 02:54:42,913 INFO L226 Difference]: Without dead ends: 602 [2021-12-17 02:54:42,918 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 [2021-12-17 02:54:42,920 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 8 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:54:42,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1787 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:54:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-17 02:54:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-12-17 02:54:42,980 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) [2021-12-17 02:54:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 909 transitions. [2021-12-17 02:54:42,988 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 909 transitions. Word has length 13 [2021-12-17 02:54:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 909 transitions. [2021-12-17 02:54:42,989 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) [2021-12-17 02:54:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 909 transitions. [2021-12-17 02:54:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 02:54:42,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:42,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:54:42,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:54:42,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash 55674269, now seen corresponding path program 1 times [2021-12-17 02:54:42,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:42,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973131959] [2021-12-17 02:54:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:42,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:43,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973131959] [2021-12-17 02:54:43,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973131959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:43,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:43,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:54:43,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602343323] [2021-12-17 02:54:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:43,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:54:43,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:54:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:54:43,146 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) [2021-12-17 02:54:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:43,326 INFO L93 Difference]: Finished difference Result 1117 states and 1672 transitions. [2021-12-17 02:54:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:54:43,326 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 [2021-12-17 02:54:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:43,333 INFO L225 Difference]: With dead ends: 1117 [2021-12-17 02:54:43,333 INFO L226 Difference]: Without dead ends: 875 [2021-12-17 02:54:43,335 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 [2021-12-17 02:54:43,336 INFO L933 BasicCegarLoop]: 1243 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, 1658 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 [2021-12-17 02:54:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1658 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:54:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-12-17 02:54:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 855. [2021-12-17 02:54:43,381 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) [2021-12-17 02:54:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1285 transitions. [2021-12-17 02:54:43,387 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1285 transitions. Word has length 15 [2021-12-17 02:54:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:43,387 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1285 transitions. [2021-12-17 02:54:43,388 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) [2021-12-17 02:54:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1285 transitions. [2021-12-17 02:54:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 02:54:43,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:43,390 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] [2021-12-17 02:54:43,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:54:43,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1471184401, now seen corresponding path program 1 times [2021-12-17 02:54:43,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:43,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435841980] [2021-12-17 02:54:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:43,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:43,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435841980] [2021-12-17 02:54:43,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435841980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:43,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:43,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:54:43,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308588289] [2021-12-17 02:54:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:43,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:54:43,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:54:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:54:43,457 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) [2021-12-17 02:54:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:43,613 INFO L93 Difference]: Finished difference Result 1817 states and 2794 transitions. [2021-12-17 02:54:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:54:43,613 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 [2021-12-17 02:54:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:43,622 INFO L225 Difference]: With dead ends: 1817 [2021-12-17 02:54:43,623 INFO L226 Difference]: Without dead ends: 1421 [2021-12-17 02:54:43,625 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 [2021-12-17 02:54:43,626 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 [2021-12-17 02:54:43,626 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] [2021-12-17 02:54:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-12-17 02:54:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1018. [2021-12-17 02:54:43,668 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) [2021-12-17 02:54:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1552 transitions. [2021-12-17 02:54:43,675 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1552 transitions. Word has length 22 [2021-12-17 02:54:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:43,675 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1552 transitions. [2021-12-17 02:54:43,676 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) [2021-12-17 02:54:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1552 transitions. [2021-12-17 02:54:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 02:54:43,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:43,678 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] [2021-12-17 02:54:43,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 02:54:43,678 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 696545090, now seen corresponding path program 1 times [2021-12-17 02:54:43,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:43,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287975075] [2021-12-17 02:54:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:43,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:43,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:43,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287975075] [2021-12-17 02:54:43,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287975075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:43,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:43,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:54:43,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340978970] [2021-12-17 02:54:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:43,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:54:43,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:54:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:54:43,785 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) [2021-12-17 02:54:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:43,842 INFO L93 Difference]: Finished difference Result 1664 states and 2490 transitions. [2021-12-17 02:54:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:54:43,843 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 [2021-12-17 02:54:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:43,849 INFO L225 Difference]: With dead ends: 1664 [2021-12-17 02:54:43,849 INFO L226 Difference]: Without dead ends: 1531 [2021-12-17 02:54:43,850 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 [2021-12-17 02:54:43,857 INFO L933 BasicCegarLoop]: 1124 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, 1523 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 [2021-12-17 02:54:43,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1523 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:54:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-12-17 02:54:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1469. [2021-12-17 02:54:43,904 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) [2021-12-17 02:54:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2224 transitions. [2021-12-17 02:54:43,910 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2224 transitions. Word has length 22 [2021-12-17 02:54:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:43,910 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 2224 transitions. [2021-12-17 02:54:43,911 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) [2021-12-17 02:54:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2224 transitions. [2021-12-17 02:54:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 02:54:43,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:43,914 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] [2021-12-17 02:54:43,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 02:54:43,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1398900519, now seen corresponding path program 1 times [2021-12-17 02:54:43,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811023098] [2021-12-17 02:54:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:43,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:44,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:44,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811023098] [2021-12-17 02:54:44,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811023098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:44,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:44,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:54:44,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854215899] [2021-12-17 02:54:44,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:44,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:54:44,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:54:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:54:44,012 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) [2021-12-17 02:54:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:44,482 INFO L93 Difference]: Finished difference Result 2648 states and 4038 transitions. [2021-12-17 02:54:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:54:44,482 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 [2021-12-17 02:54:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:44,489 INFO L225 Difference]: With dead ends: 2648 [2021-12-17 02:54:44,489 INFO L226 Difference]: Without dead ends: 1768 [2021-12-17 02:54:44,492 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 [2021-12-17 02:54:44,492 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 1415 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:54:44,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1417 Valid, 1438 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:54:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-12-17 02:54:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1457. [2021-12-17 02:54:44,529 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) [2021-12-17 02:54:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2200 transitions. [2021-12-17 02:54:44,534 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2200 transitions. Word has length 23 [2021-12-17 02:54:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 2200 transitions. [2021-12-17 02:54:44,535 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) [2021-12-17 02:54:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2200 transitions. [2021-12-17 02:54:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 02:54:44,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:44,536 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] [2021-12-17 02:54:44,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:54:44,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -579948273, now seen corresponding path program 1 times [2021-12-17 02:54:44,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:44,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516847955] [2021-12-17 02:54:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:44,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:44,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516847955] [2021-12-17 02:54:44,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516847955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:44,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:44,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:54:44,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653028854] [2021-12-17 02:54:44,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:44,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:54:44,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:54:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:54:44,584 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) [2021-12-17 02:54:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:44,651 INFO L93 Difference]: Finished difference Result 1460 states and 2202 transitions. [2021-12-17 02:54:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:54:44,652 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 [2021-12-17 02:54:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:44,657 INFO L225 Difference]: With dead ends: 1460 [2021-12-17 02:54:44,657 INFO L226 Difference]: Without dead ends: 1456 [2021-12-17 02:54:44,658 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 [2021-12-17 02:54:44,658 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 22 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:54:44,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1691 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:54:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-12-17 02:54:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2021-12-17 02:54:44,690 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) [2021-12-17 02:54:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2197 transitions. [2021-12-17 02:54:44,695 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2197 transitions. Word has length 22 [2021-12-17 02:54:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:44,695 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 2197 transitions. [2021-12-17 02:54:44,695 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) [2021-12-17 02:54:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2197 transitions. [2021-12-17 02:54:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:54:44,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:44,697 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] [2021-12-17 02:54:44,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 02:54:44,697 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -550873607, now seen corresponding path program 1 times [2021-12-17 02:54:44,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:44,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431810048] [2021-12-17 02:54:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:44,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:54:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:44,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431810048] [2021-12-17 02:54:44,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431810048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:44,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:44,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:54:44,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451479845] [2021-12-17 02:54:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:44,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:54:44,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:54:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:54:44,776 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) [2021-12-17 02:54:49,064 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 [] [2021-12-17 02:54:51,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:54:53,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:54:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:55,924 INFO L93 Difference]: Finished difference Result 2255 states and 3351 transitions. [2021-12-17 02:54:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:54:55,927 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 [2021-12-17 02:54:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:55,931 INFO L225 Difference]: With dead ends: 2255 [2021-12-17 02:54:55,931 INFO L226 Difference]: Without dead ends: 1233 [2021-12-17 02:54:55,933 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 [2021-12-17 02:54:55,933 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 713 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 275 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s 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, 11.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:54:55,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 2600 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 456 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2021-12-17 02:54:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-17 02:54:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1089. [2021-12-17 02:54:55,960 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) [2021-12-17 02:54:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1615 transitions. [2021-12-17 02:54:55,963 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1615 transitions. Word has length 35 [2021-12-17 02:54:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:55,964 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1615 transitions. [2021-12-17 02:54:55,965 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) [2021-12-17 02:54:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1615 transitions. [2021-12-17 02:54:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 02:54:55,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:55,968 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] [2021-12-17 02:54:55,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 02:54:55,969 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash 947230743, now seen corresponding path program 1 times [2021-12-17 02:54:55,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:55,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897516023] [2021-12-17 02:54:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:55,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:56,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:56,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897516023] [2021-12-17 02:54:56,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897516023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:56,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:56,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:54:56,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31447010] [2021-12-17 02:54:56,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:56,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:54:56,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:54:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:54:56,024 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) [2021-12-17 02:54:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:54:56,386 INFO L93 Difference]: Finished difference Result 1152 states and 1697 transitions. [2021-12-17 02:54:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:54:56,387 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 [2021-12-17 02:54:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:54:56,391 INFO L225 Difference]: With dead ends: 1152 [2021-12-17 02:54:56,391 INFO L226 Difference]: Without dead ends: 1107 [2021-12-17 02:54:56,392 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 [2021-12-17 02:54:56,392 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 914 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-12-17 02:54:56,392 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] [2021-12-17 02:54:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-12-17 02:54:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1089. [2021-12-17 02:54:56,417 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) [2021-12-17 02:54:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1613 transitions. [2021-12-17 02:54:56,420 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1613 transitions. Word has length 31 [2021-12-17 02:54:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:54:56,420 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1613 transitions. [2021-12-17 02:54:56,420 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) [2021-12-17 02:54:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1613 transitions. [2021-12-17 02:54:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 02:54:56,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:54:56,422 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] [2021-12-17 02:54:56,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 02:54:56,422 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:54:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:54:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2120850198, now seen corresponding path program 1 times [2021-12-17 02:54:56,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:54:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417279443] [2021-12-17 02:54:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:54:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:54:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:54:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:54:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:54:56,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:54:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417279443] [2021-12-17 02:54:56,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417279443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:54:56,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:54:56,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:54:56,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103024611] [2021-12-17 02:54:56,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:54:56,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:54:56,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:54:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:54:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:54:56,524 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) [2021-12-17 02:55:00,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:03,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:05,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:07,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:08,197 INFO L93 Difference]: Finished difference Result 1754 states and 2605 transitions. [2021-12-17 02:55:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:55:08,200 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 [2021-12-17 02:55:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:08,204 INFO L225 Difference]: With dead ends: 1754 [2021-12-17 02:55:08,204 INFO L226 Difference]: Without dead ends: 1145 [2021-12-17 02:55:08,206 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 [2021-12-17 02:55:08,206 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 915 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 136 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:08,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 1246 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 320 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2021-12-17 02:55:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-17 02:55:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1086. [2021-12-17 02:55:08,272 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) [2021-12-17 02:55:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1602 transitions. [2021-12-17 02:55:08,279 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1602 transitions. Word has length 36 [2021-12-17 02:55:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:08,279 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1602 transitions. [2021-12-17 02:55:08,279 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) [2021-12-17 02:55:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1602 transitions. [2021-12-17 02:55:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:55:08,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:08,282 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] [2021-12-17 02:55:08,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 02:55:08,282 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1333744366, now seen corresponding path program 1 times [2021-12-17 02:55:08,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869056991] [2021-12-17 02:55:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:08,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:08,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:08,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869056991] [2021-12-17 02:55:08,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869056991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:08,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:08,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:55:08,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256948068] [2021-12-17 02:55:08,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:08,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:55:08,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:55:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:55:08,349 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) [2021-12-17 02:55:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:08,377 INFO L93 Difference]: Finished difference Result 1101 states and 1622 transitions. [2021-12-17 02:55:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:55:08,378 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 [2021-12-17 02:55:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:08,383 INFO L225 Difference]: With dead ends: 1101 [2021-12-17 02:55:08,383 INFO L226 Difference]: Without dead ends: 1082 [2021-12-17 02:55:08,383 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 [2021-12-17 02:55:08,384 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 [2021-12-17 02:55:08,385 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] [2021-12-17 02:55:08,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-12-17 02:55:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1055. [2021-12-17 02:55:08,411 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) [2021-12-17 02:55:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1560 transitions. [2021-12-17 02:55:08,414 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1560 transitions. Word has length 33 [2021-12-17 02:55:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:08,414 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1560 transitions. [2021-12-17 02:55:08,414 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) [2021-12-17 02:55:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1560 transitions. [2021-12-17 02:55:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:55:08,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:08,416 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] [2021-12-17 02:55:08,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 02:55:08,417 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:08,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1348089275, now seen corresponding path program 1 times [2021-12-17 02:55:08,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:08,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116502183] [2021-12-17 02:55:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:08,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:08,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:08,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116502183] [2021-12-17 02:55:08,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116502183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:08,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:08,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:55:08,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930293882] [2021-12-17 02:55:08,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:08,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:55:08,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:55:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:55:08,480 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) [2021-12-17 02:55:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:08,553 INFO L93 Difference]: Finished difference Result 1353 states and 1993 transitions. [2021-12-17 02:55:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:55:08,554 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 [2021-12-17 02:55:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:08,559 INFO L225 Difference]: With dead ends: 1353 [2021-12-17 02:55:08,560 INFO L226 Difference]: Without dead ends: 1342 [2021-12-17 02:55:08,561 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 [2021-12-17 02:55:08,562 INFO L933 BasicCegarLoop]: 1180 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, 2004 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 [2021-12-17 02:55:08,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 2004 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:55:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-17 02:55:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1089. [2021-12-17 02:55:08,600 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) [2021-12-17 02:55:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1602 transitions. [2021-12-17 02:55:08,602 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1602 transitions. Word has length 33 [2021-12-17 02:55:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:08,603 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1602 transitions. [2021-12-17 02:55:08,603 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) [2021-12-17 02:55:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1602 transitions. [2021-12-17 02:55:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:55:08,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:08,605 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] [2021-12-17 02:55:08,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 02:55:08,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1785217405, now seen corresponding path program 1 times [2021-12-17 02:55:08,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:08,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352824724] [2021-12-17 02:55:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:08,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:08,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:08,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352824724] [2021-12-17 02:55:08,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352824724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:08,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:08,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:55:08,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522016839] [2021-12-17 02:55:08,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:08,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:55:08,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:55:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:55:08,674 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) [2021-12-17 02:55:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:09,000 INFO L93 Difference]: Finished difference Result 1118 states and 1633 transitions. [2021-12-17 02:55:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:55:09,001 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 [2021-12-17 02:55:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:09,006 INFO L225 Difference]: With dead ends: 1118 [2021-12-17 02:55:09,006 INFO L226 Difference]: Without dead ends: 1072 [2021-12-17 02:55:09,006 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 [2021-12-17 02:55:09,007 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 [2021-12-17 02:55:09,009 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] [2021-12-17 02:55:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-17 02:55:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1060. [2021-12-17 02:55:09,049 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) [2021-12-17 02:55:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1559 transitions. [2021-12-17 02:55:09,054 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1559 transitions. Word has length 33 [2021-12-17 02:55:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:09,054 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1559 transitions. [2021-12-17 02:55:09,055 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) [2021-12-17 02:55:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1559 transitions. [2021-12-17 02:55:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:55:09,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:09,057 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] [2021-12-17 02:55:09,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 02:55:09,057 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:09,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1611974706, now seen corresponding path program 1 times [2021-12-17 02:55:09,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:09,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591572715] [2021-12-17 02:55:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:09,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:09,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:09,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591572715] [2021-12-17 02:55:09,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591572715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:09,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:09,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:55:09,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626018384] [2021-12-17 02:55:09,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:09,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:55:09,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:09,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:55:09,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:55:09,178 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) [2021-12-17 02:55:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:09,602 INFO L93 Difference]: Finished difference Result 1313 states and 1935 transitions. [2021-12-17 02:55:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:55:09,602 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 [2021-12-17 02:55:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:09,607 INFO L225 Difference]: With dead ends: 1313 [2021-12-17 02:55:09,607 INFO L226 Difference]: Without dead ends: 1309 [2021-12-17 02:55:09,608 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 [2021-12-17 02:55:09,608 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 [2021-12-17 02:55:09,608 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] [2021-12-17 02:55:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-17 02:55:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1062. [2021-12-17 02:55:09,641 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) [2021-12-17 02:55:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1561 transitions. [2021-12-17 02:55:09,643 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1561 transitions. Word has length 34 [2021-12-17 02:55:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:09,644 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1561 transitions. [2021-12-17 02:55:09,644 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) [2021-12-17 02:55:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1561 transitions. [2021-12-17 02:55:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:55:09,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:09,645 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] [2021-12-17 02:55:09,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 02:55:09,645 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1612251536, now seen corresponding path program 1 times [2021-12-17 02:55:09,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:09,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450698286] [2021-12-17 02:55:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:09,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:09,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450698286] [2021-12-17 02:55:09,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450698286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:09,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:09,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:55:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422259522] [2021-12-17 02:55:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:55:09,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:55:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:55:09,710 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) [2021-12-17 02:55:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:09,788 INFO L93 Difference]: Finished difference Result 1074 states and 1573 transitions. [2021-12-17 02:55:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:55:09,789 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 [2021-12-17 02:55:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:09,792 INFO L225 Difference]: With dead ends: 1074 [2021-12-17 02:55:09,792 INFO L226 Difference]: Without dead ends: 1046 [2021-12-17 02:55:09,792 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 [2021-12-17 02:55:09,793 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 [2021-12-17 02:55:09,793 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] [2021-12-17 02:55:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-12-17 02:55:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1046. [2021-12-17 02:55:09,819 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) [2021-12-17 02:55:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1542 transitions. [2021-12-17 02:55:09,821 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1542 transitions. Word has length 34 [2021-12-17 02:55:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:09,821 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1542 transitions. [2021-12-17 02:55:09,821 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) [2021-12-17 02:55:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1542 transitions. [2021-12-17 02:55:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:55:09,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:09,823 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] [2021-12-17 02:55:09,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 02:55:09,823 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1360772428, now seen corresponding path program 1 times [2021-12-17 02:55:09,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:09,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133224515] [2021-12-17 02:55:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:09,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:09,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:55:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:09,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 02:55:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:09,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:09,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133224515] [2021-12-17 02:55:09,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133224515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:09,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:09,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:55:09,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510469455] [2021-12-17 02:55:09,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:09,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:55:09,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:09,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:55:09,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:55:09,921 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) [2021-12-17 02:55:14,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:18,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:19,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:20,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:21,067 INFO L93 Difference]: Finished difference Result 1714 states and 2541 transitions. [2021-12-17 02:55:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:55:21,070 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 [2021-12-17 02:55:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:21,075 INFO L225 Difference]: With dead ends: 1714 [2021-12-17 02:55:21,075 INFO L226 Difference]: Without dead ends: 1178 [2021-12-17 02:55:21,076 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 [2021-12-17 02:55:21,076 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 567 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 258 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s 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, 11.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:21,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 2367 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 580 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2021-12-17 02:55:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-17 02:55:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1013. [2021-12-17 02:55:21,117 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) [2021-12-17 02:55:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1508 transitions. [2021-12-17 02:55:21,119 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1508 transitions. Word has length 43 [2021-12-17 02:55:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:21,120 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1508 transitions. [2021-12-17 02:55:21,120 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) [2021-12-17 02:55:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1508 transitions. [2021-12-17 02:55:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:55:21,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:21,121 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] [2021-12-17 02:55:21,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 02:55:21,122 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681463, now seen corresponding path program 1 times [2021-12-17 02:55:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:21,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328464958] [2021-12-17 02:55:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:21,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:21,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:55:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:55:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:21,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:21,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328464958] [2021-12-17 02:55:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328464958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:21,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:21,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:55:21,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706138454] [2021-12-17 02:55:21,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:21,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:55:21,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:55:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:55:21,203 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) [2021-12-17 02:55:25,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:28,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:30,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:31,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:31,475 INFO L93 Difference]: Finished difference Result 1095 states and 1641 transitions. [2021-12-17 02:55:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:55:31,478 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 [2021-12-17 02:55:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:31,482 INFO L225 Difference]: With dead ends: 1095 [2021-12-17 02:55:31,483 INFO L226 Difference]: Without dead ends: 1088 [2021-12-17 02:55:31,484 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 [2021-12-17 02:55:31,492 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 251 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 241 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:31,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 2361 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 659 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-12-17 02:55:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-12-17 02:55:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1025. [2021-12-17 02:55:31,574 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) [2021-12-17 02:55:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1522 transitions. [2021-12-17 02:55:31,576 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1522 transitions. Word has length 43 [2021-12-17 02:55:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:31,577 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1522 transitions. [2021-12-17 02:55:31,577 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) [2021-12-17 02:55:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1522 transitions. [2021-12-17 02:55:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 02:55:31,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:31,578 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] [2021-12-17 02:55:31,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 02:55:31,579 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 436620093, now seen corresponding path program 1 times [2021-12-17 02:55:31,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:31,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988626819] [2021-12-17 02:55:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:31,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:31,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:55:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:31,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:55:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:31,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988626819] [2021-12-17 02:55:31,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988626819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:31,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:31,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:55:31,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102439734] [2021-12-17 02:55:31,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:31,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:55:31,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:55:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:55:31,669 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) [2021-12-17 02:55:35,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:38,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:40,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:41,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:43,279 INFO L93 Difference]: Finished difference Result 1165 states and 1725 transitions. [2021-12-17 02:55:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:55:43,283 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-17 02:55:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:43,287 INFO L225 Difference]: With dead ends: 1165 [2021-12-17 02:55:43,287 INFO L226 Difference]: Without dead ends: 1090 [2021-12-17 02:55:43,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:55:43,288 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 894 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 287 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 2022 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:43,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 2022 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 531 Invalid, 2 Unknown, 0 Unchecked, 11.5s Time] [2021-12-17 02:55:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-12-17 02:55:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1014. [2021-12-17 02:55:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 805 states have (on average 1.4223602484472049) internal successors, (1145), 812 states have internal predecessors, (1145), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2021-12-17 02:55:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1509 transitions. [2021-12-17 02:55:43,336 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1509 transitions. Word has length 44 [2021-12-17 02:55:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:43,336 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 1509 transitions. [2021-12-17 02:55:43,337 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), 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) [2021-12-17 02:55:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1509 transitions. [2021-12-17 02:55:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 02:55:43,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:43,339 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, 1] [2021-12-17 02:55:43,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 02:55:43,339 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash 739653955, now seen corresponding path program 1 times [2021-12-17 02:55:43,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494049372] [2021-12-17 02:55:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:43,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:55:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:43,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:55:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:43,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494049372] [2021-12-17 02:55:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494049372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:43,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:43,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:55:43,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862895570] [2021-12-17 02:55:43,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:43,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:55:43,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:55:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:55:43,439 INFO L87 Difference]: Start difference. First operand 1014 states and 1509 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-12-17 02:55:49,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:51,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:52,048 INFO L93 Difference]: Finished difference Result 1085 states and 1625 transitions. [2021-12-17 02:55:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:55:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 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 45 [2021-12-17 02:55:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:52,053 INFO L225 Difference]: With dead ends: 1085 [2021-12-17 02:55:52,053 INFO L226 Difference]: Without dead ends: 1079 [2021-12-17 02:55:52,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:55:52,054 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 1085 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:52,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 2795 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-12-17 02:55:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-12-17 02:55:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1014. [2021-12-17 02:55:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 805 states have (on average 1.4211180124223604) internal successors, (1144), 812 states have internal predecessors, (1144), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2021-12-17 02:55:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1508 transitions. [2021-12-17 02:55:52,085 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1508 transitions. Word has length 45 [2021-12-17 02:55:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:52,086 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 1508 transitions. [2021-12-17 02:55:52,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-12-17 02:55:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1508 transitions. [2021-12-17 02:55:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 02:55:52,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:52,087 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, 1, 1, 1] [2021-12-17 02:55:52,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 02:55:52,088 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:52,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:52,088 INFO L85 PathProgramCache]: Analyzing trace with hash 802587679, now seen corresponding path program 1 times [2021-12-17 02:55:52,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:52,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927773746] [2021-12-17 02:55:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:52,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:52,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:55:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:52,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:55:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:52,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927773746] [2021-12-17 02:55:52,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927773746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:52,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:52,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:55:52,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961526738] [2021-12-17 02:55:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:52,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:55:52,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:55:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:55:52,190 INFO L87 Difference]: Start difference. First operand 1014 states and 1508 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:55:56,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:58,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:01,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:02,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:04,454 INFO L93 Difference]: Finished difference Result 1066 states and 1596 transitions. [2021-12-17 02:56:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:56:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2021-12-17 02:56:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:04,481 INFO L225 Difference]: With dead ends: 1066 [2021-12-17 02:56:04,481 INFO L226 Difference]: Without dead ends: 1051 [2021-12-17 02:56:04,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:56:04,483 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 90 mSDsluCounter, 5166 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 5992 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:04,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 5992 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1565 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2021-12-17 02:56:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-12-17 02:56:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1012. [2021-12-17 02:56:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 804 states have (on average 1.4203980099502487) internal successors, (1142), 811 states have internal predecessors, (1142), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2021-12-17 02:56:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1504 transitions. [2021-12-17 02:56:04,531 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1504 transitions. Word has length 47 [2021-12-17 02:56:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:04,531 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 1504 transitions. [2021-12-17 02:56:04,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1504 transitions. [2021-12-17 02:56:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 02:56:04,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:04,533 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, 1] [2021-12-17 02:56:04,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 02:56:04,534 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:04,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1789257707, now seen corresponding path program 1 times [2021-12-17 02:56:04,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:04,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330125185] [2021-12-17 02:56:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:04,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 02:56:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:04,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:56:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:04,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:04,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330125185] [2021-12-17 02:56:04,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330125185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:04,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:04,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:56:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103553517] [2021-12-17 02:56:04,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:56:04,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:56:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:56:04,683 INFO L87 Difference]: Start difference. First operand 1012 states and 1504 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:09,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:11,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:15,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:16,813 INFO L93 Difference]: Finished difference Result 1063 states and 1591 transitions. [2021-12-17 02:56:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:56:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-17 02:56:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:16,820 INFO L225 Difference]: With dead ends: 1063 [2021-12-17 02:56:16,820 INFO L226 Difference]: Without dead ends: 1048 [2021-12-17 02:56:16,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:56:16,821 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 90 mSDsluCounter, 5123 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 5941 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:16,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 5941 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1553 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2021-12-17 02:56:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-12-17 02:56:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1009. [2021-12-17 02:56:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 802 states have (on average 1.4201995012468829) internal successors, (1139), 809 states have internal predecessors, (1139), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2021-12-17 02:56:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1499 transitions. [2021-12-17 02:56:16,901 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1499 transitions. Word has length 45 [2021-12-17 02:56:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:16,901 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1499 transitions. [2021-12-17 02:56:16,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1499 transitions. [2021-12-17 02:56:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 02:56:16,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:16,903 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, 1, 1] [2021-12-17 02:56:16,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 02:56:16,904 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1509819145, now seen corresponding path program 1 times [2021-12-17 02:56:16,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:16,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650688209] [2021-12-17 02:56:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:16,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:56:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:17,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:56:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:17,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650688209] [2021-12-17 02:56:17,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650688209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:17,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:17,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:56:17,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46332285] [2021-12-17 02:56:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:17,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:56:17,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:56:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:17,093 INFO L87 Difference]: Start difference. First operand 1009 states and 1499 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:21,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:23,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:26,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:28,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:30,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:32,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:34,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:34,289 INFO L93 Difference]: Finished difference Result 1091 states and 1631 transitions. [2021-12-17 02:56:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:56:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-17 02:56:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:34,296 INFO L225 Difference]: With dead ends: 1091 [2021-12-17 02:56:34,296 INFO L226 Difference]: Without dead ends: 1004 [2021-12-17 02:56:34,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:56:34,297 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 310 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 250 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 5322 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:34,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 5322 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1019 Invalid, 5 Unknown, 0 Unchecked, 17.1s Time] [2021-12-17 02:56:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-12-17 02:56:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 943. [2021-12-17 02:56:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 754 states have (on average 1.3992042440318302) internal successors, (1055), 761 states have internal predecessors, (1055), 134 states have call successors, (134), 49 states have call predecessors, (134), 54 states have return successors, (182), 132 states have call predecessors, (182), 128 states have call successors, (182) [2021-12-17 02:56:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1371 transitions. [2021-12-17 02:56:34,329 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1371 transitions. Word has length 46 [2021-12-17 02:56:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:34,330 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1371 transitions. [2021-12-17 02:56:34,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1371 transitions. [2021-12-17 02:56:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 02:56:34,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:34,331 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, 1, 1] [2021-12-17 02:56:34,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 02:56:34,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -718667050, now seen corresponding path program 1 times [2021-12-17 02:56:34,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035073605] [2021-12-17 02:56:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:34,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 02:56:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:34,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:56:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:34,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035073605] [2021-12-17 02:56:34,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035073605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:34,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:34,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:56:34,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954472734] [2021-12-17 02:56:34,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:34,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:34,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:34,392 INFO L87 Difference]: Start difference. First operand 943 states and 1371 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:38,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:41,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:43,572 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 [] [2021-12-17 02:56:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:44,676 INFO L93 Difference]: Finished difference Result 1056 states and 1532 transitions. [2021-12-17 02:56:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:56:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-17 02:56:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:44,680 INFO L225 Difference]: With dead ends: 1056 [2021-12-17 02:56:44,680 INFO L226 Difference]: Without dead ends: 1032 [2021-12-17 02:56:44,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:56:44,684 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 276 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 227 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:44,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2146 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 547 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2021-12-17 02:56:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-12-17 02:56:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 948. [2021-12-17 02:56:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 759 states have (on average 1.3992094861660078) internal successors, (1062), 766 states have internal predecessors, (1062), 134 states have call successors, (134), 49 states have call predecessors, (134), 54 states have return successors, (182), 132 states have call predecessors, (182), 128 states have call successors, (182) [2021-12-17 02:56:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1378 transitions. [2021-12-17 02:56:44,717 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1378 transitions. Word has length 46 [2021-12-17 02:56:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:44,717 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1378 transitions. [2021-12-17 02:56:44,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1378 transitions. [2021-12-17 02:56:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 02:56:44,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:44,719 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, 1, 1] [2021-12-17 02:56:44,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 02:56:44,719 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -852680556, now seen corresponding path program 1 times [2021-12-17 02:56:44,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405973147] [2021-12-17 02:56:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:44,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:44,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 02:56:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:44,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:56:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:44,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405973147] [2021-12-17 02:56:44,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405973147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:44,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:44,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:56:44,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276458240] [2021-12-17 02:56:44,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:56:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:56:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:44,853 INFO L87 Difference]: Start difference. First operand 948 states and 1378 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:49,905 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 [] [2021-12-17 02:56:52,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:54,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:56,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:56,644 INFO L93 Difference]: Finished difference Result 1031 states and 1499 transitions. [2021-12-17 02:56:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:56:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-17 02:56:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:56,650 INFO L225 Difference]: With dead ends: 1031 [2021-12-17 02:56:56,650 INFO L226 Difference]: Without dead ends: 1005 [2021-12-17 02:56:56,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:56:56,659 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 290 mSDsluCounter, 4033 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 217 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 4762 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:56,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 4762 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 979 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2021-12-17 02:56:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-12-17 02:56:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 939. [2021-12-17 02:56:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 751 states have (on average 1.3808255659121171) internal successors, (1037), 758 states have internal predecessors, (1037), 133 states have call successors, (133), 49 states have call predecessors, (133), 54 states have return successors, (181), 131 states have call predecessors, (181), 127 states have call successors, (181) [2021-12-17 02:56:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1351 transitions. [2021-12-17 02:56:56,707 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1351 transitions. Word has length 46 [2021-12-17 02:56:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:56,707 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1351 transitions. [2021-12-17 02:56:56,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1351 transitions. [2021-12-17 02:56:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:56:56,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:56,709 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, 1, 1, 1, 1] [2021-12-17 02:56:56,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 02:56:56,710 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -845814790, now seen corresponding path program 1 times [2021-12-17 02:56:56,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:56,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252839794] [2021-12-17 02:56:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:56,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:56,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:56:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:56,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:56:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:56,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252839794] [2021-12-17 02:56:56,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252839794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:56,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:56,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 02:56:56,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075458088] [2021-12-17 02:56:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:56,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:56:56,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:56:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:56:56,914 INFO L87 Difference]: Start difference. First operand 939 states and 1351 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:04,726 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 [] [2021-12-17 02:57:07,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:09,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:09,572 INFO L93 Difference]: Finished difference Result 992 states and 1429 transitions. [2021-12-17 02:57:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:57:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-17 02:57:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:09,578 INFO L225 Difference]: With dead ends: 992 [2021-12-17 02:57:09,578 INFO L226 Difference]: Without dead ends: 975 [2021-12-17 02:57:09,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:57:09,579 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 101 mSDsluCounter, 4927 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 91 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 5629 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:09,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 5629 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1592 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2021-12-17 02:57:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-17 02:57:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 936. [2021-12-17 02:57:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 749 states have (on average 1.3805073431241655) internal successors, (1034), 756 states have internal predecessors, (1034), 132 states have call successors, (132), 49 states have call predecessors, (132), 54 states have return successors, (180), 130 states have call predecessors, (180), 126 states have call successors, (180) [2021-12-17 02:57:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1346 transitions. [2021-12-17 02:57:09,615 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1346 transitions. Word has length 48 [2021-12-17 02:57:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:09,615 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1346 transitions. [2021-12-17 02:57:09,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1346 transitions. [2021-12-17 02:57:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 02:57:09,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:09,620 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, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:09,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 02:57:09,620 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1069501193, now seen corresponding path program 1 times [2021-12-17 02:57:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28558041] [2021-12-17 02:57:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:09,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:09,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:57:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:09,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:57:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:09,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28558041] [2021-12-17 02:57:09,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28558041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:09,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:09,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 02:57:09,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469185141] [2021-12-17 02:57:09,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:09,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:57:09,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:09,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:57:09,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:57:09,765 INFO L87 Difference]: Start difference. First operand 936 states and 1346 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:16,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:18,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:20,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:21,617 INFO L93 Difference]: Finished difference Result 990 states and 1425 transitions. [2021-12-17 02:57:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:57:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-17 02:57:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:21,621 INFO L225 Difference]: With dead ends: 990 [2021-12-17 02:57:21,622 INFO L226 Difference]: Without dead ends: 973 [2021-12-17 02:57:21,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:57:21,622 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 113 mSDsluCounter, 5534 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 90 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 6242 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:21,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 6242 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1750 Invalid, 2 Unknown, 0 Unchecked, 11.7s Time] [2021-12-17 02:57:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-17 02:57:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 934. [2021-12-17 02:57:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 748 states have (on average 1.3796791443850267) internal successors, (1032), 755 states have internal predecessors, (1032), 131 states have call successors, (131), 49 states have call predecessors, (131), 54 states have return successors, (179), 129 states have call predecessors, (179), 125 states have call successors, (179) [2021-12-17 02:57:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1342 transitions. [2021-12-17 02:57:21,655 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1342 transitions. Word has length 50 [2021-12-17 02:57:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:21,655 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1342 transitions. [2021-12-17 02:57:21,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1342 transitions. [2021-12-17 02:57:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 02:57:21,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:21,657 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, 1, 1, 1, 1, 1] [2021-12-17 02:57:21,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 02:57:21,657 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1867130754, now seen corresponding path program 1 times [2021-12-17 02:57:21,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:21,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091903430] [2021-12-17 02:57:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:21,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:57:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:57:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:21,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091903430] [2021-12-17 02:57:21,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091903430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:21,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:21,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 02:57:21,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869449992] [2021-12-17 02:57:21,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:21,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:57:21,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:21,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:57:21,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:57:21,776 INFO L87 Difference]: Start difference. First operand 934 states and 1342 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:27,705 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 [] [2021-12-17 02:57:30,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:32,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:33,085 INFO L93 Difference]: Finished difference Result 987 states and 1420 transitions. [2021-12-17 02:57:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:57:33,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-17 02:57:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:33,089 INFO L225 Difference]: With dead ends: 987 [2021-12-17 02:57:33,089 INFO L226 Difference]: Without dead ends: 970 [2021-12-17 02:57:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:57:33,090 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 113 mSDsluCounter, 5435 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 89 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 6127 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:33,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 6127 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1734 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2021-12-17 02:57:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-12-17 02:57:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 931. [2021-12-17 02:57:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 746 states have (on average 1.3793565683646112) internal successors, (1029), 753 states have internal predecessors, (1029), 130 states have call successors, (130), 49 states have call predecessors, (130), 54 states have return successors, (178), 128 states have call predecessors, (178), 124 states have call successors, (178) [2021-12-17 02:57:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1337 transitions. [2021-12-17 02:57:33,141 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1337 transitions. Word has length 49 [2021-12-17 02:57:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:33,142 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1337 transitions. [2021-12-17 02:57:33,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1337 transitions. [2021-12-17 02:57:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 02:57:33,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:33,144 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:33,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 02:57:33,144 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1446724930, now seen corresponding path program 1 times [2021-12-17 02:57:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030869305] [2021-12-17 02:57:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:33,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:57:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 02:57:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:33,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 02:57:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:33,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:33,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030869305] [2021-12-17 02:57:33,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030869305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:33,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:33,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:57:33,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014322147] [2021-12-17 02:57:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:33,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:57:33,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:57:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:33,299 INFO L87 Difference]: Start difference. First operand 931 states and 1337 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:57:39,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:41,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:45,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:47,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:49,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:50,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:50,808 INFO L93 Difference]: Finished difference Result 1988 states and 2864 transitions. [2021-12-17 02:57:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:57:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-12-17 02:57:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:50,815 INFO L225 Difference]: With dead ends: 1988 [2021-12-17 02:57:50,815 INFO L226 Difference]: Without dead ends: 1918 [2021-12-17 02:57:50,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-12-17 02:57:50,817 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1239 mSDsluCounter, 3373 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 597 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 4148 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:50,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 4148 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 1159 Invalid, 5 Unknown, 0 Unchecked, 17.3s Time] [2021-12-17 02:57:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-12-17 02:57:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1441. [2021-12-17 02:57:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1138 states have (on average 1.3611599297012302) internal successors, (1549), 1163 states have internal predecessors, (1549), 205 states have call successors, (205), 87 states have call predecessors, (205), 97 states have return successors, (306), 190 states have call predecessors, (306), 199 states have call successors, (306) [2021-12-17 02:57:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2060 transitions. [2021-12-17 02:57:50,911 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2060 transitions. Word has length 51 [2021-12-17 02:57:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:50,912 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2060 transitions. [2021-12-17 02:57:50,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:57:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2060 transitions. [2021-12-17 02:57:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 02:57:50,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:50,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:50,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 02:57:50,916 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash -650091910, now seen corresponding path program 1 times [2021-12-17 02:57:50,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:50,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181439704] [2021-12-17 02:57:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:50,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:57:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:50,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 02:57:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:57:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 02:57:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:51,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181439704] [2021-12-17 02:57:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181439704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:51,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:51,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:57:51,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070154657] [2021-12-17 02:57:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:51,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:57:51,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:57:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:57:51,024 INFO L87 Difference]: Start difference. First operand 1441 states and 2060 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:55,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:58,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:00,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:02,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:02,510 INFO L93 Difference]: Finished difference Result 2219 states and 3192 transitions. [2021-12-17 02:58:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:58:02,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2021-12-17 02:58:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:02,516 INFO L225 Difference]: With dead ends: 2219 [2021-12-17 02:58:02,516 INFO L226 Difference]: Without dead ends: 1537 [2021-12-17 02:58:02,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:58:02,517 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 448 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 310 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:02,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 2429 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 673 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2021-12-17 02:58:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-12-17 02:58:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1450. [2021-12-17 02:58:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1145 states have (on average 1.3554585152838428) internal successors, (1552), 1171 states have internal predecessors, (1552), 204 states have call successors, (204), 87 states have call predecessors, (204), 100 states have return successors, (311), 191 states have call predecessors, (311), 199 states have call successors, (311) [2021-12-17 02:58:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2067 transitions. [2021-12-17 02:58:02,622 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2067 transitions. Word has length 53 [2021-12-17 02:58:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:02,622 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 2067 transitions. [2021-12-17 02:58:02,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:58:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2067 transitions. [2021-12-17 02:58:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 02:58:02,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:02,625 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:02,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 02:58:02,625 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash -419671339, now seen corresponding path program 1 times [2021-12-17 02:58:02,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:02,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344456657] [2021-12-17 02:58:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:02,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:02,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:58:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:02,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:58:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 02:58:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:02,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344456657] [2021-12-17 02:58:02,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344456657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:02,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:02,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:58:02,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115437170] [2021-12-17 02:58:02,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:02,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:58:02,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:58:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:58:02,749 INFO L87 Difference]: Start difference. First operand 1450 states and 2067 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:07,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:11,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:13,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:13,208 INFO L93 Difference]: Finished difference Result 1821 states and 2677 transitions. [2021-12-17 02:58:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:58:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-12-17 02:58:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:13,215 INFO L225 Difference]: With dead ends: 1821 [2021-12-17 02:58:13,215 INFO L226 Difference]: Without dead ends: 1675 [2021-12-17 02:58:13,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:58:13,220 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 270 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 231 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 2559 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:13,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 2559 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 781 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2021-12-17 02:58:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-12-17 02:58:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1482. [2021-12-17 02:58:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1169 states have (on average 1.3550042771599657) internal successors, (1584), 1199 states have internal predecessors, (1584), 206 states have call successors, (206), 87 states have call predecessors, (206), 106 states have return successors, (343), 195 states have call predecessors, (343), 201 states have call successors, (343) [2021-12-17 02:58:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2133 transitions. [2021-12-17 02:58:13,290 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2133 transitions. Word has length 51 [2021-12-17 02:58:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:13,290 INFO L470 AbstractCegarLoop]: Abstraction has 1482 states and 2133 transitions. [2021-12-17 02:58:13,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2133 transitions. [2021-12-17 02:58:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 02:58:13,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:13,293 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:13,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 02:58:13,294 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:13,294 INFO L85 PathProgramCache]: Analyzing trace with hash -929144429, now seen corresponding path program 1 times [2021-12-17 02:58:13,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435413075] [2021-12-17 02:58:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:13,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:13,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:58:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:13,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:58:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 02:58:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:13,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435413075] [2021-12-17 02:58:13,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435413075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:13,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:58:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433718933] [2021-12-17 02:58:13,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:58:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:58:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:58:13,471 INFO L87 Difference]: Start difference. First operand 1482 states and 2133 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:19,979 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 [] [2021-12-17 02:58:22,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:24,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:24,912 INFO L93 Difference]: Finished difference Result 1636 states and 2353 transitions. [2021-12-17 02:58:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:58:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-12-17 02:58:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:24,919 INFO L225 Difference]: With dead ends: 1636 [2021-12-17 02:58:24,919 INFO L226 Difference]: Without dead ends: 1617 [2021-12-17 02:58:24,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:58:24,920 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 297 mSDsluCounter, 3817 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 207 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 4513 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:24,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 4513 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1090 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2021-12-17 02:58:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-12-17 02:58:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1480. [2021-12-17 02:58:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1168 states have (on average 1.3544520547945205) internal successors, (1582), 1198 states have internal predecessors, (1582), 205 states have call successors, (205), 87 states have call predecessors, (205), 106 states have return successors, (342), 194 states have call predecessors, (342), 200 states have call successors, (342) [2021-12-17 02:58:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 2129 transitions. [2021-12-17 02:58:24,995 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 2129 transitions. Word has length 51 [2021-12-17 02:58:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:24,995 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 2129 transitions. [2021-12-17 02:58:24,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 2129 transitions. [2021-12-17 02:58:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 02:58:24,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:24,998 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, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:24,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 02:58:24,999 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash 632910699, now seen corresponding path program 1 times [2021-12-17 02:58:24,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:24,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89810294] [2021-12-17 02:58:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:24,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:25,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:58:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:25,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 02:58:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:25,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89810294] [2021-12-17 02:58:25,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89810294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:25,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:25,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:58:25,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853713099] [2021-12-17 02:58:25,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:25,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:58:25,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:25,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:58:25,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:58:25,124 INFO L87 Difference]: Start difference. First operand 1480 states and 2129 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:58:29,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:32,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:34,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:36,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:36,102 INFO L93 Difference]: Finished difference Result 1620 states and 2327 transitions. [2021-12-17 02:58:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:58:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-17 02:58:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:36,108 INFO L225 Difference]: With dead ends: 1620 [2021-12-17 02:58:36,109 INFO L226 Difference]: Without dead ends: 1575 [2021-12-17 02:58:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:58:36,110 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 972 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 234 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:36,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 1590 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 638 Invalid, 3 Unknown, 0 Unchecked, 10.8s Time] [2021-12-17 02:58:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-12-17 02:58:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1480. [2021-12-17 02:58:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1168 states have (on average 1.3527397260273972) internal successors, (1580), 1198 states have internal predecessors, (1580), 205 states have call successors, (205), 87 states have call predecessors, (205), 106 states have return successors, (342), 194 states have call predecessors, (342), 200 states have call successors, (342) [2021-12-17 02:58:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 2127 transitions. [2021-12-17 02:58:36,176 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 2127 transitions. Word has length 50 [2021-12-17 02:58:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:36,176 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 2127 transitions. [2021-12-17 02:58:36,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:58:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 2127 transitions. [2021-12-17 02:58:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:58:36,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:36,180 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:36,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 02:58:36,180 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -770651842, now seen corresponding path program 1 times [2021-12-17 02:58:36,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:36,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762582917] [2021-12-17 02:58:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:36,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:36,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:58:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:36,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:58:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:36,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 02:58:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:36,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:36,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762582917] [2021-12-17 02:58:36,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762582917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:36,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:36,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:58:36,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399874897] [2021-12-17 02:58:36,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:36,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:58:36,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:58:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:58:36,299 INFO L87 Difference]: Start difference. First operand 1480 states and 2127 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:41,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:44,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:45,757 INFO L93 Difference]: Finished difference Result 1671 states and 2420 transitions. [2021-12-17 02:58:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:58:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-17 02:58:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:45,765 INFO L225 Difference]: With dead ends: 1671 [2021-12-17 02:58:45,765 INFO L226 Difference]: Without dead ends: 1645 [2021-12-17 02:58:45,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:58:45,766 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 238 mSDsluCounter, 2587 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 205 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:45,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 3275 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 811 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-12-17 02:58:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-12-17 02:58:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1496. [2021-12-17 02:58:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1176 states have (on average 1.3503401360544218) internal successors, (1588), 1214 states have internal predecessors, (1588), 205 states have call successors, (205), 87 states have call predecessors, (205), 114 states have return successors, (378), 194 states have call predecessors, (378), 200 states have call successors, (378) [2021-12-17 02:58:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2171 transitions. [2021-12-17 02:58:45,826 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2171 transitions. Word has length 52 [2021-12-17 02:58:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:45,826 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 2171 transitions. [2021-12-17 02:58:45,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2171 transitions. [2021-12-17 02:58:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:58:45,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:45,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:45,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 02:58:45,830 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:45,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2147433733, now seen corresponding path program 1 times [2021-12-17 02:58:45,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:45,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433472476] [2021-12-17 02:58:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:45,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:58:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:45,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:58:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:58:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:45,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433472476] [2021-12-17 02:58:45,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433472476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:45,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:45,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:58:45,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452770323] [2021-12-17 02:58:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:45,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:58:45,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:58:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:58:45,920 INFO L87 Difference]: Start difference. First operand 1496 states and 2171 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:50,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:53,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:55,518 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 [] [2021-12-17 02:58:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:55,627 INFO L93 Difference]: Finished difference Result 2232 states and 3242 transitions. [2021-12-17 02:58:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:58:55,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2021-12-17 02:58:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:55,634 INFO L225 Difference]: With dead ends: 2232 [2021-12-17 02:58:55,634 INFO L226 Difference]: Without dead ends: 1497 [2021-12-17 02:58:55,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:58:55,637 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 235 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 200 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:55,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1978 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 559 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2021-12-17 02:58:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-12-17 02:58:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1190. [2021-12-17 02:58:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 955 states have (on average 1.356020942408377) internal successors, (1295), 984 states have internal predecessors, (1295), 160 states have call successors, (160), 65 states have call predecessors, (160), 74 states have return successors, (187), 140 states have call predecessors, (187), 155 states have call successors, (187) [2021-12-17 02:58:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1642 transitions. [2021-12-17 02:58:55,694 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1642 transitions. Word has length 54 [2021-12-17 02:58:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:55,694 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1642 transitions. [2021-12-17 02:58:55,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:58:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1642 transitions. [2021-12-17 02:58:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 02:58:55,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:55,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:55,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 02:58:55,697 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -296917279, now seen corresponding path program 1 times [2021-12-17 02:58:55,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:55,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82095695] [2021-12-17 02:58:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:55,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:58:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:58:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:58:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:58:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:55,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:55,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82095695] [2021-12-17 02:58:55,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82095695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:55,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:55,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:58:55,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350682884] [2021-12-17 02:58:55,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:55,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:58:55,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:55,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:58:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:58:55,822 INFO L87 Difference]: Start difference. First operand 1190 states and 1642 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:00,912 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 [] [2021-12-17 02:59:02,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:05,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:07,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:09,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:10,437 INFO L93 Difference]: Finished difference Result 2464 states and 3519 transitions. [2021-12-17 02:59:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 02:59:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-12-17 02:59:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:10,443 INFO L225 Difference]: With dead ends: 2464 [2021-12-17 02:59:10,443 INFO L226 Difference]: Without dead ends: 2001 [2021-12-17 02:59:10,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-12-17 02:59:10,445 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 2037 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 753 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:10,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2112 Valid, 2657 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1307 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2021-12-17 02:59:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-12-17 02:59:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1234. [2021-12-17 02:59:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 992 states have (on average 1.3508064516129032) internal successors, (1340), 1023 states have internal predecessors, (1340), 162 states have call successors, (162), 67 states have call predecessors, (162), 79 states have return successors, (194), 143 states have call predecessors, (194), 157 states have call successors, (194) [2021-12-17 02:59:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1696 transitions. [2021-12-17 02:59:10,521 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1696 transitions. Word has length 58 [2021-12-17 02:59:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:10,521 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1696 transitions. [2021-12-17 02:59:10,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1696 transitions. [2021-12-17 02:59:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 02:59:10,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:10,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:10,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 02:59:10,523 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 39038593, now seen corresponding path program 1 times [2021-12-17 02:59:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198931053] [2021-12-17 02:59:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:10,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:59:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:59:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:10,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 02:59:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:10,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198931053] [2021-12-17 02:59:10,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198931053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:10,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:10,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 02:59:10,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834047777] [2021-12-17 02:59:10,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:10,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:59:10,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:59:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:59:10,681 INFO L87 Difference]: Start difference. First operand 1234 states and 1696 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:59:17,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:19,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:21,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:23,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:27,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:29,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:29,309 INFO L93 Difference]: Finished difference Result 1355 states and 1871 transitions. [2021-12-17 02:59:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:59:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-17 02:59:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:29,313 INFO L225 Difference]: With dead ends: 1355 [2021-12-17 02:59:29,313 INFO L226 Difference]: Without dead ends: 1329 [2021-12-17 02:59:29,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-17 02:59:29,314 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 223 mSDsluCounter, 4989 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 119 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:29,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 5643 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1631 Invalid, 1 Unknown, 0 Unchecked, 18.5s Time] [2021-12-17 02:59:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-12-17 02:59:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1229. [2021-12-17 02:59:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 989 states have (on average 1.3498483316481293) internal successors, (1335), 1019 states have internal predecessors, (1335), 160 states have call successors, (160), 67 states have call predecessors, (160), 79 states have return successors, (192), 142 states have call predecessors, (192), 155 states have call successors, (192) [2021-12-17 02:59:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1687 transitions. [2021-12-17 02:59:29,359 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1687 transitions. Word has length 56 [2021-12-17 02:59:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:29,360 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 1687 transitions. [2021-12-17 02:59:29,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:59:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1687 transitions. [2021-12-17 02:59:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 02:59:29,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:29,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:29,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 02:59:29,362 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash 574526005, now seen corresponding path program 1 times [2021-12-17 02:59:29,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:29,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378420491] [2021-12-17 02:59:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:29,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:29,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 02:59:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:29,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 02:59:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:29,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 02:59:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:29,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:29,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378420491] [2021-12-17 02:59:29,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378420491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:29,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:29,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:59:29,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166724847] [2021-12-17 02:59:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:59:29,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:59:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:59:29,461 INFO L87 Difference]: Start difference. First operand 1229 states and 1687 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:59:34,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:35,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:38,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:40,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:43,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:45,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:47,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:50,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:52,599 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 [] [2021-12-17 02:59:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:53,162 INFO L93 Difference]: Finished difference Result 1409 states and 1929 transitions. [2021-12-17 02:59:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:59:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-17 02:59:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:53,167 INFO L225 Difference]: With dead ends: 1409 [2021-12-17 02:59:53,167 INFO L226 Difference]: Without dead ends: 1358 [2021-12-17 02:59:53,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:53,167 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 205 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 123 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 3434 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1156 Invalid, 7 Unknown, 0 Unchecked, 23.6s Time] [2021-12-17 02:59:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-12-17 02:59:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1229. [2021-12-17 02:59:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 989 states have (on average 1.3478260869565217) internal successors, (1333), 1019 states have internal predecessors, (1333), 160 states have call successors, (160), 67 states have call predecessors, (160), 79 states have return successors, (192), 142 states have call predecessors, (192), 155 states have call successors, (192) [2021-12-17 02:59:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1685 transitions. [2021-12-17 02:59:53,211 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1685 transitions. Word has length 56 [2021-12-17 02:59:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:53,211 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 1685 transitions. [2021-12-17 02:59:53,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:59:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1685 transitions. [2021-12-17 02:59:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 02:59:53,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:53,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:53,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 02:59:53,213 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1797213257, now seen corresponding path program 1 times [2021-12-17 02:59:53,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:53,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098079686] [2021-12-17 02:59:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:53,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 02:59:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:53,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 02:59:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:53,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 02:59:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:53,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:53,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098079686] [2021-12-17 02:59:53,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098079686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:53,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:53,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:59:53,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692837692] [2021-12-17 02:59:53,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:53,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:59:53,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:53,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:59:53,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:53,352 INFO L87 Difference]: Start difference. First operand 1229 states and 1685 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:00:00,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:02,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:05,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:08,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:10,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:12,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:14,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:14,791 INFO L93 Difference]: Finished difference Result 1360 states and 1874 transitions. [2021-12-17 03:00:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:00:14,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-17 03:00:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:14,796 INFO L225 Difference]: With dead ends: 1360 [2021-12-17 03:00:14,796 INFO L226 Difference]: Without dead ends: 1324 [2021-12-17 03:00:14,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-17 03:00:14,797 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 243 mSDsluCounter, 3851 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 129 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 4523 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:14,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 4523 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1436 Invalid, 4 Unknown, 0 Unchecked, 21.3s Time] [2021-12-17 03:00:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-12-17 03:00:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1224. [2021-12-17 03:00:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 986 states have (on average 1.330628803245436) internal successors, (1312), 1015 states have internal predecessors, (1312), 158 states have call successors, (158), 67 states have call predecessors, (158), 79 states have return successors, (190), 141 states have call predecessors, (190), 153 states have call successors, (190) [2021-12-17 03:00:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1660 transitions. [2021-12-17 03:00:14,867 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1660 transitions. Word has length 56 [2021-12-17 03:00:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:14,867 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1660 transitions. [2021-12-17 03:00:14,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:00:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1660 transitions. [2021-12-17 03:00:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:00:14,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:14,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:14,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:00:14,870 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash -141551244, now seen corresponding path program 1 times [2021-12-17 03:00:14,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:14,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135663887] [2021-12-17 03:00:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:14,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:14,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:00:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:14,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 03:00:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:15,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:00:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:15,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135663887] [2021-12-17 03:00:15,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135663887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:15,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:15,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:00:15,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790819676] [2021-12-17 03:00:15,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:15,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:00:15,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:00:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:00:15,035 INFO L87 Difference]: Start difference. First operand 1224 states and 1660 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:00:16,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:21,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:23,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:27,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:31,516 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 [] [2021-12-17 03:00:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:32,193 INFO L93 Difference]: Finished difference Result 1349 states and 1836 transitions. [2021-12-17 03:00:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:00:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-12-17 03:00:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:32,198 INFO L225 Difference]: With dead ends: 1349 [2021-12-17 03:00:32,198 INFO L226 Difference]: Without dead ends: 1316 [2021-12-17 03:00:32,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:00:32,198 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 168 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 118 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:32,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 3194 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1073 Invalid, 4 Unknown, 0 Unchecked, 17.1s Time] [2021-12-17 03:00:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-12-17 03:00:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1216. [2021-12-17 03:00:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 980 states have (on average 1.3306122448979592) internal successors, (1304), 1008 states have internal predecessors, (1304), 156 states have call successors, (156), 67 states have call predecessors, (156), 79 states have return successors, (188), 140 states have call predecessors, (188), 151 states have call successors, (188) [2021-12-17 03:00:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1648 transitions. [2021-12-17 03:00:32,314 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1648 transitions. Word has length 57 [2021-12-17 03:00:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:32,314 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1648 transitions. [2021-12-17 03:00:32,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:00:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1648 transitions. [2021-12-17 03:00:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:00:32,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:32,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:32,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:00:32,319 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1027349856, now seen corresponding path program 1 times [2021-12-17 03:00:32,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:32,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530963310] [2021-12-17 03:00:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:32,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:32,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:00:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 03:00:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:32,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:00:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:32,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530963310] [2021-12-17 03:00:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530963310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:32,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:32,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:00:32,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000357927] [2021-12-17 03:00:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:32,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:00:32,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:00:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:00:32,604 INFO L87 Difference]: Start difference. First operand 1216 states and 1648 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:00:37,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:39,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:41,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:43,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:45,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:45,447 INFO L93 Difference]: Finished difference Result 1341 states and 1824 transitions. [2021-12-17 03:00:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:00:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-12-17 03:00:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:45,453 INFO L225 Difference]: With dead ends: 1341 [2021-12-17 03:00:45,453 INFO L226 Difference]: Without dead ends: 1308 [2021-12-17 03:00:45,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:00:45,454 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 301 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 266 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:45,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 2937 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 765 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-12-17 03:00:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-12-17 03:00:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1208. [2021-12-17 03:00:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 974 states have (on average 1.3305954825462012) internal successors, (1296), 1001 states have internal predecessors, (1296), 154 states have call successors, (154), 67 states have call predecessors, (154), 79 states have return successors, (186), 139 states have call predecessors, (186), 149 states have call successors, (186) [2021-12-17 03:00:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1636 transitions. [2021-12-17 03:00:45,497 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1636 transitions. Word has length 57 [2021-12-17 03:00:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:45,498 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1636 transitions. [2021-12-17 03:00:45,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:00:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1636 transitions. [2021-12-17 03:00:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:00:45,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:45,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:45,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:00:45,500 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -686154142, now seen corresponding path program 1 times [2021-12-17 03:00:45,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456981934] [2021-12-17 03:00:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:45,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:45,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:00:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:45,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 03:00:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:45,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:00:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:45,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 03:00:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:45,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456981934] [2021-12-17 03:00:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456981934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:45,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:45,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:00:45,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504534203] [2021-12-17 03:00:45,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:00:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:00:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:00:45,646 INFO L87 Difference]: Start difference. First operand 1208 states and 1636 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:00:51,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:53,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:54,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:56,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:58,475 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 [] [2021-12-17 03:00:58,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:58,641 INFO L93 Difference]: Finished difference Result 1329 states and 1809 transitions. [2021-12-17 03:00:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:00:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2021-12-17 03:00:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:58,648 INFO L225 Difference]: With dead ends: 1329 [2021-12-17 03:00:58,648 INFO L226 Difference]: Without dead ends: 1239 [2021-12-17 03:00:58,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:00:58,649 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 425 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 282 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 4331 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:58,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 4331 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1170 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2021-12-17 03:00:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-17 03:00:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1135. [2021-12-17 03:00:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 919 states have (on average 1.3318824809575627) internal successors, (1224), 945 states have internal predecessors, (1224), 142 states have call successors, (142), 63 states have call predecessors, (142), 73 states have return successors, (166), 126 states have call predecessors, (166), 137 states have call successors, (166) [2021-12-17 03:00:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1532 transitions. [2021-12-17 03:00:58,724 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1532 transitions. Word has length 61 [2021-12-17 03:00:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:58,725 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1532 transitions. [2021-12-17 03:00:58,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:00:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1532 transitions. [2021-12-17 03:00:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:00:58,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:58,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:58,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:00:58,727 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash -102836352, now seen corresponding path program 1 times [2021-12-17 03:00:58,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:58,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007073891] [2021-12-17 03:00:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:58,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:00:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:00:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 03:00:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:00:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:00:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:58,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:58,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007073891] [2021-12-17 03:00:58,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007073891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:58,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:58,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:00:58,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119232422] [2021-12-17 03:00:58,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:58,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:00:58,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:00:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:00:58,872 INFO L87 Difference]: Start difference. First operand 1135 states and 1532 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 03:01:03,969 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 [] [2021-12-17 03:01:05,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:09,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:11,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:11,397 INFO L93 Difference]: Finished difference Result 1637 states and 2272 transitions. [2021-12-17 03:01:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:01:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2021-12-17 03:01:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:11,402 INFO L225 Difference]: With dead ends: 1637 [2021-12-17 03:01:11,402 INFO L226 Difference]: Without dead ends: 1217 [2021-12-17 03:01:11,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:01:11,404 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 250 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 180 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:11,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1901 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 783 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2021-12-17 03:01:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-12-17 03:01:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1135. [2021-12-17 03:01:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 919 states have (on average 1.3253536452665942) internal successors, (1218), 945 states have internal predecessors, (1218), 142 states have call successors, (142), 63 states have call predecessors, (142), 73 states have return successors, (166), 126 states have call predecessors, (166), 137 states have call successors, (166) [2021-12-17 03:01:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1526 transitions. [2021-12-17 03:01:11,452 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1526 transitions. Word has length 61 [2021-12-17 03:01:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1526 transitions. [2021-12-17 03:01:11,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 03:01:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1526 transitions. [2021-12-17 03:01:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:01:11,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:11,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:11,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:01:11,454 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2076179163, now seen corresponding path program 1 times [2021-12-17 03:01:11,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:11,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972992792] [2021-12-17 03:01:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:11,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:11,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:01:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:11,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 03:01:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:11,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 03:01:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:11,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972992792] [2021-12-17 03:01:11,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972992792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:11,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:11,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:01:11,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688344640] [2021-12-17 03:01:11,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:11,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:01:11,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:11,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:01:11,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:01:11,731 INFO L87 Difference]: Start difference. First operand 1135 states and 1526 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:17,635 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 [] [2021-12-17 03:01:19,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:19,878 INFO L93 Difference]: Finished difference Result 1250 states and 1684 transitions. [2021-12-17 03:01:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:01:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-12-17 03:01:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:19,883 INFO L225 Difference]: With dead ends: 1250 [2021-12-17 03:01:19,883 INFO L226 Difference]: Without dead ends: 1221 [2021-12-17 03:01:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:01:19,884 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 295 mSDsluCounter, 4221 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 184 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 4817 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 4817 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1306 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-12-17 03:01:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-17 03:01:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1127. [2021-12-17 03:01:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 913 states have (on average 1.3253012048192772) internal successors, (1210), 938 states have internal predecessors, (1210), 140 states have call successors, (140), 63 states have call predecessors, (140), 73 states have return successors, (164), 125 states have call predecessors, (164), 135 states have call successors, (164) [2021-12-17 03:01:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1514 transitions. [2021-12-17 03:01:19,941 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1514 transitions. Word has length 59 [2021-12-17 03:01:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:19,941 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1514 transitions. [2021-12-17 03:01:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1514 transitions. [2021-12-17 03:01:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:01:19,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:19,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:19,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:01:19,946 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1709226114, now seen corresponding path program 1 times [2021-12-17 03:01:19,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:19,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244815677] [2021-12-17 03:01:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:19,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:01:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:20,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:20,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 03:01:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:20,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244815677] [2021-12-17 03:01:20,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244815677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:20,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:20,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:01:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897645929] [2021-12-17 03:01:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:20,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:01:20,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:01:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:01:20,170 INFO L87 Difference]: Start difference. First operand 1127 states and 1514 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:26,900 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 [] [2021-12-17 03:01:29,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:29,638 INFO L93 Difference]: Finished difference Result 1242 states and 1672 transitions. [2021-12-17 03:01:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:01:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-12-17 03:01:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:29,642 INFO L225 Difference]: With dead ends: 1242 [2021-12-17 03:01:29,642 INFO L226 Difference]: Without dead ends: 1216 [2021-12-17 03:01:29,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:01:29,643 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 292 mSDsluCounter, 4135 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 182 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 4719 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:29,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 4719 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1288 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2021-12-17 03:01:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-17 03:01:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1122. [2021-12-17 03:01:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 910 states have (on average 1.3241758241758241) internal successors, (1205), 934 states have internal predecessors, (1205), 138 states have call successors, (138), 63 states have call predecessors, (138), 73 states have return successors, (162), 124 states have call predecessors, (162), 133 states have call successors, (162) [2021-12-17 03:01:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1505 transitions. [2021-12-17 03:01:29,690 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1505 transitions. Word has length 59 [2021-12-17 03:01:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:29,691 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1505 transitions. [2021-12-17 03:01:29,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1505 transitions. [2021-12-17 03:01:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:01:29,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:29,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:29,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:01:29,693 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -257289914, now seen corresponding path program 1 times [2021-12-17 03:01:29,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:29,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104963155] [2021-12-17 03:01:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:29,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:01:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 03:01:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:01:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:29,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104963155] [2021-12-17 03:01:29,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104963155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:29,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:29,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:01:29,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18774664] [2021-12-17 03:01:29,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:29,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:01:29,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:01:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:01:29,881 INFO L87 Difference]: Start difference. First operand 1122 states and 1505 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:34,735 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 [] [2021-12-17 03:01:36,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:38,888 INFO L93 Difference]: Finished difference Result 1241 states and 1666 transitions. [2021-12-17 03:01:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:01:38,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2021-12-17 03:01:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:38,892 INFO L225 Difference]: With dead ends: 1241 [2021-12-17 03:01:38,892 INFO L226 Difference]: Without dead ends: 1197 [2021-12-17 03:01:38,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:01:38,892 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 168 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 108 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:38,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 2834 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1023 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-12-17 03:01:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-17 03:01:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1103. [2021-12-17 03:01:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 893 states have (on average 1.3202687569988802) internal successors, (1179), 916 states have internal predecessors, (1179), 136 states have call successors, (136), 63 states have call predecessors, (136), 73 states have return successors, (160), 123 states have call predecessors, (160), 131 states have call successors, (160) [2021-12-17 03:01:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1475 transitions. [2021-12-17 03:01:38,935 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1475 transitions. Word has length 60 [2021-12-17 03:01:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:38,935 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1475 transitions. [2021-12-17 03:01:38,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1475 transitions. [2021-12-17 03:01:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 03:01:38,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:38,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:38,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:01:38,937 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2000903411, now seen corresponding path program 1 times [2021-12-17 03:01:38,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350635871] [2021-12-17 03:01:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:38,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:01:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:39,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:01:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:01:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:39,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:01:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:01:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350635871] [2021-12-17 03:01:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350635871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:39,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:01:39,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414860101] [2021-12-17 03:01:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:39,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:01:39,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:01:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:01:39,075 INFO L87 Difference]: Start difference. First operand 1103 states and 1475 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 03:01:44,299 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 [] [2021-12-17 03:01:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:44,389 INFO L93 Difference]: Finished difference Result 1730 states and 2369 transitions. [2021-12-17 03:01:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:01:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 77 [2021-12-17 03:01:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:44,393 INFO L225 Difference]: With dead ends: 1730 [2021-12-17 03:01:44,393 INFO L226 Difference]: Without dead ends: 1227 [2021-12-17 03:01:44,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:01:44,395 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 548 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:44,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1933 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 03:01:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-12-17 03:01:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1112. [2021-12-17 03:01:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 902 states have (on average 1.3203991130820398) internal successors, (1191), 925 states have internal predecessors, (1191), 136 states have call successors, (136), 63 states have call predecessors, (136), 73 states have return successors, (160), 123 states have call predecessors, (160), 131 states have call successors, (160) [2021-12-17 03:01:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1487 transitions. [2021-12-17 03:01:44,452 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1487 transitions. Word has length 77 [2021-12-17 03:01:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:44,453 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1487 transitions. [2021-12-17 03:01:44,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 03:01:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1487 transitions. [2021-12-17 03:01:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:01:44,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:44,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:44,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:01:44,455 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash -239287796, now seen corresponding path program 1 times [2021-12-17 03:01:44,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:44,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234039063] [2021-12-17 03:01:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:44,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:01:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:44,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:01:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:44,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:01:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:44,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:44,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234039063] [2021-12-17 03:01:44,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234039063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:44,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:44,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:01:44,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345978956] [2021-12-17 03:01:44,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:44,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:01:44,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:01:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:01:44,585 INFO L87 Difference]: Start difference. First operand 1112 states and 1487 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:48,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:51,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:51,741 INFO L93 Difference]: Finished difference Result 1396 states and 1904 transitions. [2021-12-17 03:01:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:01:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2021-12-17 03:01:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:51,745 INFO L225 Difference]: With dead ends: 1396 [2021-12-17 03:01:51,746 INFO L226 Difference]: Without dead ends: 1390 [2021-12-17 03:01:51,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-12-17 03:01:51,746 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 1337 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 451 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:51,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1877 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 895 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-12-17 03:01:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-12-17 03:01:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1112. [2021-12-17 03:01:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 902 states have (on average 1.319290465631929) internal successors, (1190), 925 states have internal predecessors, (1190), 136 states have call successors, (136), 63 states have call predecessors, (136), 73 states have return successors, (160), 123 states have call predecessors, (160), 131 states have call successors, (160) [2021-12-17 03:01:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1486 transitions. [2021-12-17 03:01:51,797 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1486 transitions. Word has length 61 [2021-12-17 03:01:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:51,798 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1486 transitions. [2021-12-17 03:01:51,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:01:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1486 transitions. [2021-12-17 03:01:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 03:01:51,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:51,801 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:51,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:01:51,801 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 682910779, now seen corresponding path program 1 times [2021-12-17 03:01:51,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56471673] [2021-12-17 03:01:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:51,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:01:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:51,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 03:01:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 03:01:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:01:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:51,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:01:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:01:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:52,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56471673] [2021-12-17 03:01:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56471673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:52,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:52,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:01:52,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833425826] [2021-12-17 03:01:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:01:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:01:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:01:52,006 INFO L87 Difference]: Start difference. First operand 1112 states and 1486 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 03:01:56,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:59,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:59,531 INFO L93 Difference]: Finished difference Result 1717 states and 2293 transitions. [2021-12-17 03:01:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:01:59,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2021-12-17 03:01:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:59,535 INFO L225 Difference]: With dead ends: 1717 [2021-12-17 03:01:59,535 INFO L226 Difference]: Without dead ends: 1167 [2021-12-17 03:01:59,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:01:59,536 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 933 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 265 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 2674 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:59,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 2674 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1256 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-12-17 03:01:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-12-17 03:01:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1082. [2021-12-17 03:01:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 878 states have (on average 1.3052391799544418) internal successors, (1146), 897 states have internal predecessors, (1146), 134 states have call successors, (134), 63 states have call predecessors, (134), 69 states have return successors, (146), 121 states have call predecessors, (146), 129 states have call successors, (146) [2021-12-17 03:01:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1426 transitions. [2021-12-17 03:01:59,583 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1426 transitions. Word has length 77 [2021-12-17 03:01:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:59,583 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1426 transitions. [2021-12-17 03:01:59,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 03:01:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1426 transitions. [2021-12-17 03:01:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 03:01:59,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:59,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:59,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:01:59,585 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash -731877270, now seen corresponding path program 1 times [2021-12-17 03:01:59,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:59,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738067906] [2021-12-17 03:01:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:59,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:01:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:01:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:01:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:01:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:01:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:59,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:59,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738067906] [2021-12-17 03:01:59,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738067906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:01:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754370108] [2021-12-17 03:01:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:59,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:01:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:01:59,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:01:59,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:02:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:00,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 03:02:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:02:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:00,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:02:00,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754370108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:00,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:02:00,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2021-12-17 03:02:00,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118405490] [2021-12-17 03:02:00,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:00,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:02:00,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:02:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:02:00,524 INFO L87 Difference]: Start difference. First operand 1082 states and 1426 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:02:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:00,612 INFO L93 Difference]: Finished difference Result 1524 states and 2067 transitions. [2021-12-17 03:02:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:02:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 78 [2021-12-17 03:02:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:00,615 INFO L225 Difference]: With dead ends: 1524 [2021-12-17 03:02:00,615 INFO L226 Difference]: Without dead ends: 1286 [2021-12-17 03:02:00,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:02:00,617 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 307 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:00,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1226 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:02:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-12-17 03:02:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1248. [2021-12-17 03:02:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1010 states have (on average 1.3277227722772278) internal successors, (1341), 1028 states have internal predecessors, (1341), 158 states have call successors, (158), 71 states have call predecessors, (158), 79 states have return successors, (175), 148 states have call predecessors, (175), 154 states have call successors, (175) [2021-12-17 03:02:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1674 transitions. [2021-12-17 03:02:00,670 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1674 transitions. Word has length 78 [2021-12-17 03:02:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:00,671 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1674 transitions. [2021-12-17 03:02:00,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:02:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1674 transitions. [2021-12-17 03:02:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:02:00,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:00,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:00,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:02:00,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-17 03:02:00,888 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1228308663, now seen corresponding path program 1 times [2021-12-17 03:02:00,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799580023] [2021-12-17 03:02:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:00,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:00,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:02:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:00,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:02:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:02:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:01,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799580023] [2021-12-17 03:02:01,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799580023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:01,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:01,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:02:01,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126380580] [2021-12-17 03:02:01,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:01,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:02:01,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:01,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:02:01,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:02:01,116 INFO L87 Difference]: Start difference. First operand 1248 states and 1674 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:02:08,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:10,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:13,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:15,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:15,410 INFO L93 Difference]: Finished difference Result 1330 states and 1789 transitions. [2021-12-17 03:02:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 03:02:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2021-12-17 03:02:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:15,414 INFO L225 Difference]: With dead ends: 1330 [2021-12-17 03:02:15,414 INFO L226 Difference]: Without dead ends: 1296 [2021-12-17 03:02:15,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:02:15,415 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 142 mSDsluCounter, 4381 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 83 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 4933 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:15,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 4933 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1870 Invalid, 4 Unknown, 0 Unchecked, 14.1s Time] [2021-12-17 03:02:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-12-17 03:02:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1228. [2021-12-17 03:02:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 993 states have (on average 1.3293051359516617) internal successors, (1320), 1010 states have internal predecessors, (1320), 155 states have call successors, (155), 71 states have call predecessors, (155), 79 states have return successors, (172), 146 states have call predecessors, (172), 151 states have call successors, (172) [2021-12-17 03:02:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1647 transitions. [2021-12-17 03:02:15,465 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1647 transitions. Word has length 62 [2021-12-17 03:02:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1647 transitions. [2021-12-17 03:02:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:02:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1647 transitions. [2021-12-17 03:02:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:02:15,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:15,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 03:02:15,469 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 274646869, now seen corresponding path program 1 times [2021-12-17 03:02:15,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:15,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203042304] [2021-12-17 03:02:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:15,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:02:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:02:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:02:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:15,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203042304] [2021-12-17 03:02:15,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203042304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:15,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:15,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:02:15,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118734286] [2021-12-17 03:02:15,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:15,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:02:15,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:02:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:02:15,589 INFO L87 Difference]: Start difference. First operand 1228 states and 1647 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:02:18,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:25,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:25,324 INFO L93 Difference]: Finished difference Result 1511 states and 2061 transitions. [2021-12-17 03:02:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:02:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2021-12-17 03:02:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:25,328 INFO L225 Difference]: With dead ends: 1511 [2021-12-17 03:02:25,328 INFO L226 Difference]: Without dead ends: 1507 [2021-12-17 03:02:25,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-12-17 03:02:25,329 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 1420 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 432 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:25,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 1722 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 1053 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-12-17 03:02:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-12-17 03:02:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1226. [2021-12-17 03:02:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 991 states have (on average 1.3289606458123109) internal successors, (1317), 1008 states have internal predecessors, (1317), 155 states have call successors, (155), 71 states have call predecessors, (155), 79 states have return successors, (172), 146 states have call predecessors, (172), 151 states have call successors, (172) [2021-12-17 03:02:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1644 transitions. [2021-12-17 03:02:25,383 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1644 transitions. Word has length 62 [2021-12-17 03:02:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:25,384 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1644 transitions. [2021-12-17 03:02:25,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 03:02:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1644 transitions. [2021-12-17 03:02:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:02:25,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:25,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:25,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:02:25,385 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:25,386 INFO L85 PathProgramCache]: Analyzing trace with hash 274923699, now seen corresponding path program 1 times [2021-12-17 03:02:25,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:25,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121211589] [2021-12-17 03:02:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:25,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:25,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:02:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:02:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:25,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:02:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:25,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:25,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121211589] [2021-12-17 03:02:25,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121211589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:25,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:25,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:02:25,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694030137] [2021-12-17 03:02:25,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:25,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:02:25,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:25,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:02:25,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:02:25,524 INFO L87 Difference]: Start difference. First operand 1226 states and 1644 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:02:30,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:32,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:35,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:37,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:37,945 INFO L93 Difference]: Finished difference Result 1304 states and 1752 transitions. [2021-12-17 03:02:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:02:37,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2021-12-17 03:02:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:37,949 INFO L225 Difference]: With dead ends: 1304 [2021-12-17 03:02:37,949 INFO L226 Difference]: Without dead ends: 1235 [2021-12-17 03:02:37,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:02:37,950 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 243 mSDsluCounter, 3377 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 148 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 3905 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:37,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 3905 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1515 Invalid, 4 Unknown, 0 Unchecked, 12.3s Time] [2021-12-17 03:02:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-12-17 03:02:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1166. [2021-12-17 03:02:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 939 states have (on average 1.3333333333333333) internal successors, (1252), 955 states have internal predecessors, (1252), 151 states have call successors, (151), 67 states have call predecessors, (151), 75 states have return successors, (167), 143 states have call predecessors, (167), 147 states have call successors, (167) [2021-12-17 03:02:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1570 transitions. [2021-12-17 03:02:37,997 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1570 transitions. Word has length 62 [2021-12-17 03:02:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1570 transitions. [2021-12-17 03:02:37,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:02:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1570 transitions. [2021-12-17 03:02:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 03:02:37,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:37,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:37,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 03:02:37,999 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash 977944014, now seen corresponding path program 1 times [2021-12-17 03:02:37,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:37,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196235105] [2021-12-17 03:02:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:38,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:38,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:02:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 03:02:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:38,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 03:02:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:38,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:02:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 03:02:38,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:38,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196235105] [2021-12-17 03:02:38,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196235105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:38,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:38,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:02:38,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488947259] [2021-12-17 03:02:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:38,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:02:38,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:02:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:02:38,243 INFO L87 Difference]: Start difference. First operand 1166 states and 1570 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:02:43,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:45,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:48,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:50,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:51,391 INFO L93 Difference]: Finished difference Result 1266 states and 1700 transitions. [2021-12-17 03:02:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:02:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2021-12-17 03:02:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:51,395 INFO L225 Difference]: With dead ends: 1266 [2021-12-17 03:02:51,395 INFO L226 Difference]: Without dead ends: 1227 [2021-12-17 03:02:51,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:02:51,396 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 223 mSDsluCounter, 4049 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 104 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4599 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:51,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 4599 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1448 Invalid, 4 Unknown, 0 Unchecked, 13.0s Time] [2021-12-17 03:02:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-12-17 03:02:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1148. [2021-12-17 03:02:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 925 states have (on average 1.334054054054054) internal successors, (1234), 940 states have internal predecessors, (1234), 147 states have call successors, (147), 67 states have call predecessors, (147), 75 states have return successors, (163), 140 states have call predecessors, (163), 143 states have call successors, (163) [2021-12-17 03:02:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1544 transitions. [2021-12-17 03:02:51,442 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1544 transitions. Word has length 65 [2021-12-17 03:02:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:51,442 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 1544 transitions. [2021-12-17 03:02:51,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:02:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1544 transitions. [2021-12-17 03:02:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 03:02:51,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:51,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:51,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 03:02:51,444 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1128703656, now seen corresponding path program 1 times [2021-12-17 03:02:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:51,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507344221] [2021-12-17 03:02:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:51,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:51,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:02:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:51,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 03:02:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:51,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:02:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:51,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507344221] [2021-12-17 03:02:51,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507344221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:51,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:51,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:02:51,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326068172] [2021-12-17 03:02:51,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:51,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:02:51,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:02:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:02:51,615 INFO L87 Difference]: Start difference. First operand 1148 states and 1544 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:02:57,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:59,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:02,808 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 [] [2021-12-17 03:03:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:03,342 INFO L93 Difference]: Finished difference Result 1217 states and 1636 transitions. [2021-12-17 03:03:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 03:03:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2021-12-17 03:03:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:03,346 INFO L225 Difference]: With dead ends: 1217 [2021-12-17 03:03:03,346 INFO L226 Difference]: Without dead ends: 1200 [2021-12-17 03:03:03,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:03:03,347 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 141 mSDsluCounter, 4165 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 4696 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:03,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 4696 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1827 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2021-12-17 03:03:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-12-17 03:03:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1146. [2021-12-17 03:03:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 924 states have (on average 1.3322510822510822) internal successors, (1231), 939 states have internal predecessors, (1231), 146 states have call successors, (146), 67 states have call predecessors, (146), 75 states have return successors, (162), 139 states have call predecessors, (162), 142 states have call successors, (162) [2021-12-17 03:03:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1539 transitions. [2021-12-17 03:03:03,405 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1539 transitions. Word has length 65 [2021-12-17 03:03:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:03,406 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1539 transitions. [2021-12-17 03:03:03,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:03:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1539 transitions. [2021-12-17 03:03:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 03:03:03,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:03,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:03:03,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 03:03:03,408 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash -76650201, now seen corresponding path program 1 times [2021-12-17 03:03:03,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:03,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18641440] [2021-12-17 03:03:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:03,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:03,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:03:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:03,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:03:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:03,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:03:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:03:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:03:03,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18641440] [2021-12-17 03:03:03,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18641440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:03,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:03,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:03:03,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910625710] [2021-12-17 03:03:03,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:03,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:03:03,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:03:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:03:03,525 INFO L87 Difference]: Start difference. First operand 1146 states and 1539 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 03:03:08,266 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 [] [2021-12-17 03:03:11,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:13,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:15,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:18,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:20,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:23,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:23,253 INFO L93 Difference]: Finished difference Result 1797 states and 2477 transitions. [2021-12-17 03:03:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:03:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 66 [2021-12-17 03:03:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:23,258 INFO L225 Difference]: With dead ends: 1797 [2021-12-17 03:03:23,258 INFO L226 Difference]: Without dead ends: 1754 [2021-12-17 03:03:23,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-12-17 03:03:23,259 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 1198 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 227 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 3517 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:23,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 3517 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1911 Invalid, 6 Unknown, 0 Unchecked, 19.5s Time] [2021-12-17 03:03:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-12-17 03:03:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1129. [2021-12-17 03:03:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 911 states have (on average 1.3304061470911086) internal successors, (1212), 926 states have internal predecessors, (1212), 143 states have call successors, (143), 66 states have call predecessors, (143), 74 states have return successors, (159), 136 states have call predecessors, (159), 139 states have call successors, (159) [2021-12-17 03:03:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1514 transitions. [2021-12-17 03:03:23,311 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1514 transitions. Word has length 66 [2021-12-17 03:03:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:23,311 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1514 transitions. [2021-12-17 03:03:23,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 03:03:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1514 transitions. [2021-12-17 03:03:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 03:03:23,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:23,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:03:23,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 03:03:23,313 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash -204114336, now seen corresponding path program 1 times [2021-12-17 03:03:23,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:23,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132325424] [2021-12-17 03:03:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:23,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:03:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 03:03:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:03:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 03:03:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:03:23,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132325424] [2021-12-17 03:03:23,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132325424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:23,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:23,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 03:03:23,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915838462] [2021-12-17 03:03:23,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:23,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 03:03:23,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 03:03:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:03:23,554 INFO L87 Difference]: Start difference. First operand 1129 states and 1514 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:03:27,331 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 [] [2021-12-17 03:03:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:28,279 INFO L93 Difference]: Finished difference Result 2005 states and 2730 transitions. [2021-12-17 03:03:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:03:28,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2021-12-17 03:03:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:28,283 INFO L225 Difference]: With dead ends: 2005 [2021-12-17 03:03:28,283 INFO L226 Difference]: Without dead ends: 1176 [2021-12-17 03:03:28,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-17 03:03:28,284 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 285 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 225 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:28,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2314 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 698 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 03:03:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-12-17 03:03:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1132. [2021-12-17 03:03:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 914 states have (on average 1.3293216630196936) internal successors, (1215), 929 states have internal predecessors, (1215), 143 states have call successors, (143), 66 states have call predecessors, (143), 74 states have return successors, (159), 136 states have call predecessors, (159), 139 states have call successors, (159) [2021-12-17 03:03:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1517 transitions. [2021-12-17 03:03:28,333 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1517 transitions. Word has length 71 [2021-12-17 03:03:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:28,333 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1517 transitions. [2021-12-17 03:03:28,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:03:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1517 transitions. [2021-12-17 03:03:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 03:03:28,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:28,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:03:28,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-17 03:03:28,335 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:28,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:28,335 INFO L85 PathProgramCache]: Analyzing trace with hash -762238228, now seen corresponding path program 1 times [2021-12-17 03:03:28,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:28,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885546774] [2021-12-17 03:03:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:28,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:28,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:03:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:28,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 03:03:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:28,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:28,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 03:03:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:28,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 03:03:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:03:28,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885546774] [2021-12-17 03:03:28,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885546774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:28,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:28,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:03:28,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752831156] [2021-12-17 03:03:28,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:28,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:03:28,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:28,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:03:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:03:28,858 INFO L87 Difference]: Start difference. First operand 1132 states and 1517 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 03:03:34,694 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 [] [2021-12-17 03:03:38,282 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 [] [2021-12-17 03:03:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:38,354 INFO L93 Difference]: Finished difference Result 1240 states and 1646 transitions. [2021-12-17 03:03:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:03:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2021-12-17 03:03:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:38,358 INFO L225 Difference]: With dead ends: 1240 [2021-12-17 03:03:38,358 INFO L226 Difference]: Without dead ends: 1185 [2021-12-17 03:03:38,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:03:38,359 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 314 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 232 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 4328 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:38,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 4328 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1416 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-12-17 03:03:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-17 03:03:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1142. [2021-12-17 03:03:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 920 states have (on average 1.3271739130434783) internal successors, (1221), 937 states have internal predecessors, (1221), 143 states have call successors, (143), 66 states have call predecessors, (143), 78 states have return successors, (167), 138 states have call predecessors, (167), 139 states have call successors, (167) [2021-12-17 03:03:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1531 transitions. [2021-12-17 03:03:38,459 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1531 transitions. Word has length 70 [2021-12-17 03:03:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:38,459 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1531 transitions. [2021-12-17 03:03:38,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 03:03:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1531 transitions. [2021-12-17 03:03:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 03:03:38,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:38,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:03:38,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 03:03:38,461 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1786932149, now seen corresponding path program 1 times [2021-12-17 03:03:38,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:38,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560935558] [2021-12-17 03:03:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:38,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:39,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:03:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 03:03:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:39,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:39,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 03:03:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 03:03:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:03:39,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:39,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560935558] [2021-12-17 03:03:39,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560935558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:39,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:39,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:03:39,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331155285] [2021-12-17 03:03:39,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:39,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:03:39,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:03:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:03:39,314 INFO L87 Difference]: Start difference. First operand 1142 states and 1531 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:03:44,551 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 [] [2021-12-17 03:03:47,309 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 [] [2021-12-17 03:03:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:47,385 INFO L93 Difference]: Finished difference Result 1192 states and 1593 transitions. [2021-12-17 03:03:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:03:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-12-17 03:03:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:47,390 INFO L225 Difference]: With dead ends: 1192 [2021-12-17 03:03:47,390 INFO L226 Difference]: Without dead ends: 1141 [2021-12-17 03:03:47,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:03:47,391 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 364 mSDsluCounter, 3781 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 228 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 4297 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:47,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 4297 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1413 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2021-12-17 03:03:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-12-17 03:03:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1097. [2021-12-17 03:03:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 886 states have (on average 1.3363431151241536) internal successors, (1184), 900 states have internal predecessors, (1184), 136 states have call successors, (136), 66 states have call predecessors, (136), 74 states have return successors, (150), 130 states have call predecessors, (150), 132 states have call successors, (150) [2021-12-17 03:03:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1470 transitions. [2021-12-17 03:03:47,455 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1470 transitions. Word has length 70 [2021-12-17 03:03:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:47,455 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1470 transitions. [2021-12-17 03:03:47,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:03:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1470 transitions. [2021-12-17 03:03:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 03:03:47,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:47,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:03:47,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-17 03:03:47,457 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1011031692, now seen corresponding path program 1 times [2021-12-17 03:03:47,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:47,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860304512] [2021-12-17 03:03:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:47,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:03:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:03:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:03:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 03:03:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:03:47,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860304512] [2021-12-17 03:03:47,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860304512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:03:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701241970] [2021-12-17 03:03:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:47,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:03:47,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:03:47,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:03:47,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:03:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:48,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 03:03:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:03:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:03:48,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:03:48,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701241970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:48,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:03:48,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-17 03:03:48,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259124762] [2021-12-17 03:03:48,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:48,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:03:48,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:03:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:03:48,800 INFO L87 Difference]: Start difference. First operand 1097 states and 1470 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:03:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:48,853 INFO L93 Difference]: Finished difference Result 1335 states and 1803 transitions. [2021-12-17 03:03:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 03:03:48,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2021-12-17 03:03:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:48,855 INFO L225 Difference]: With dead ends: 1335 [2021-12-17 03:03:48,855 INFO L226 Difference]: Without dead ends: 1083 [2021-12-17 03:03:48,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:03:48,856 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 15 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2076 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:48,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 2076 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:03:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-12-17 03:03:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1083. [2021-12-17 03:03:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 872 states have (on average 1.334862385321101) internal successors, (1164), 886 states have internal predecessors, (1164), 136 states have call successors, (136), 66 states have call predecessors, (136), 74 states have return successors, (150), 130 states have call predecessors, (150), 132 states have call successors, (150) [2021-12-17 03:03:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1450 transitions. [2021-12-17 03:03:48,906 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1450 transitions. Word has length 72 [2021-12-17 03:03:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:48,907 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 1450 transitions. [2021-12-17 03:03:48,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:03:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1450 transitions. [2021-12-17 03:03:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 03:03:48,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:48,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:03:48,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:03:49,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-17 03:03:49,130 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1747493624, now seen corresponding path program 1 times [2021-12-17 03:03:49,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:49,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164576661] [2021-12-17 03:03:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:49,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:03:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 03:03:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:49,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:03:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 03:03:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:03:49,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164576661] [2021-12-17 03:03:49,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164576661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:49,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:49,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:03:49,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266488524] [2021-12-17 03:03:49,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:03:49,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:03:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:03:49,359 INFO L87 Difference]: Start difference. First operand 1083 states and 1450 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 03:03:55,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:57,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:59,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:00,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:00,678 INFO L93 Difference]: Finished difference Result 1678 states and 2324 transitions. [2021-12-17 03:04:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:04:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 69 [2021-12-17 03:04:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:00,681 INFO L225 Difference]: With dead ends: 1678 [2021-12-17 03:04:00,681 INFO L226 Difference]: Without dead ends: 1616 [2021-12-17 03:04:00,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:04:00,683 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 1098 mSDsluCounter, 4029 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 361 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 4935 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:00,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 4935 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1503 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2021-12-17 03:04:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-17 03:04:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 804. [2021-12-17 03:04:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 647 states have (on average 1.3848531684698608) internal successors, (896), 651 states have internal predecessors, (896), 107 states have call successors, (107), 46 states have call predecessors, (107), 49 states have return successors, (113), 106 states have call predecessors, (113), 104 states have call successors, (113) [2021-12-17 03:04:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1116 transitions. [2021-12-17 03:04:00,780 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1116 transitions. Word has length 69 [2021-12-17 03:04:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:00,780 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 1116 transitions. [2021-12-17 03:04:00,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 03:04:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1116 transitions. [2021-12-17 03:04:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 03:04:00,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:00,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:00,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-17 03:04:00,781 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash -665918522, now seen corresponding path program 1 times [2021-12-17 03:04:00,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798835499] [2021-12-17 03:04:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:00,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:01,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 03:04:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:01,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:01,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:04:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:01,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:04:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:04:01,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798835499] [2021-12-17 03:04:01,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798835499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:01,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:01,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:04:01,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573390985] [2021-12-17 03:04:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:01,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:04:01,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:01,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:04:01,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:04:01,184 INFO L87 Difference]: Start difference. First operand 804 states and 1116 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 03:04:04,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:06,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:06,348 INFO L93 Difference]: Finished difference Result 890 states and 1215 transitions. [2021-12-17 03:04:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:04:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 75 [2021-12-17 03:04:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:06,350 INFO L225 Difference]: With dead ends: 890 [2021-12-17 03:04:06,350 INFO L226 Difference]: Without dead ends: 847 [2021-12-17 03:04:06,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:04:06,350 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 229 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:06,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 3846 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 03:04:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-12-17 03:04:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 809. [2021-12-17 03:04:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 650 states have (on average 1.383076923076923) internal successors, (899), 655 states have internal predecessors, (899), 107 states have call successors, (107), 46 states have call predecessors, (107), 51 states have return successors, (116), 107 states have call predecessors, (116), 104 states have call successors, (116) [2021-12-17 03:04:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1122 transitions. [2021-12-17 03:04:06,407 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1122 transitions. Word has length 75 [2021-12-17 03:04:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 1122 transitions. [2021-12-17 03:04:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 03:04:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1122 transitions. [2021-12-17 03:04:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 03:04:06,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:06,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:06,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 03:04:06,409 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1690612443, now seen corresponding path program 1 times [2021-12-17 03:04:06,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:06,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987589468] [2021-12-17 03:04:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:06,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:06,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 03:04:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:04:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:06,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:04:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:04:06,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:06,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987589468] [2021-12-17 03:04:06,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987589468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:06,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:06,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:04:06,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145981654] [2021-12-17 03:04:06,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:06,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:04:06,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:06,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:04:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:04:06,931 INFO L87 Difference]: Start difference. First operand 809 states and 1122 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:04:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:09,455 INFO L93 Difference]: Finished difference Result 859 states and 1181 transitions. [2021-12-17 03:04:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:04:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 75 [2021-12-17 03:04:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:09,457 INFO L225 Difference]: With dead ends: 859 [2021-12-17 03:04:09,457 INFO L226 Difference]: Without dead ends: 826 [2021-12-17 03:04:09,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:04:09,458 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 227 mSDsluCounter, 3603 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:09,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 4066 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 03:04:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-12-17 03:04:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 792. [2021-12-17 03:04:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 637 states have (on average 1.3861852433281006) internal successors, (883), 641 states have internal predecessors, (883), 105 states have call successors, (105), 46 states have call predecessors, (105), 49 states have return successors, (110), 104 states have call predecessors, (110), 102 states have call successors, (110) [2021-12-17 03:04:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1098 transitions. [2021-12-17 03:04:09,497 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1098 transitions. Word has length 75 [2021-12-17 03:04:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:09,497 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1098 transitions. [2021-12-17 03:04:09,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:04:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1098 transitions. [2021-12-17 03:04:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 03:04:09,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:09,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:09,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-17 03:04:09,498 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash 948137921, now seen corresponding path program 1 times [2021-12-17 03:04:09,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902818894] [2021-12-17 03:04:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:09,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:09,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 03:04:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:09,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:04:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:04:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:04:09,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:09,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902818894] [2021-12-17 03:04:09,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902818894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:09,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:09,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 03:04:09,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482886091] [2021-12-17 03:04:09,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:09,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 03:04:09,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:09,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 03:04:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-17 03:04:09,697 INFO L87 Difference]: Start difference. First operand 792 states and 1098 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:04:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:10,958 INFO L93 Difference]: Finished difference Result 828 states and 1142 transitions. [2021-12-17 03:04:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:04:10,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2021-12-17 03:04:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:10,959 INFO L225 Difference]: With dead ends: 828 [2021-12-17 03:04:10,960 INFO L226 Difference]: Without dead ends: 764 [2021-12-17 03:04:10,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:04:10,960 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 242 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:10,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 3596 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:04:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-12-17 03:04:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 732. [2021-12-17 03:04:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 586 states have (on average 1.4027303754266212) internal successors, (822), 589 states have internal predecessors, (822), 99 states have call successors, (99), 43 states have call predecessors, (99), 46 states have return successors, (105), 99 states have call predecessors, (105), 97 states have call successors, (105) [2021-12-17 03:04:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1026 transitions. [2021-12-17 03:04:10,997 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1026 transitions. Word has length 72 [2021-12-17 03:04:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:10,997 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1026 transitions. [2021-12-17 03:04:10,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:04:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1026 transitions. [2021-12-17 03:04:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 03:04:10,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:10,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:10,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-17 03:04:10,999 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:10,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1378267027, now seen corresponding path program 1 times [2021-12-17 03:04:10,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:10,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575855104] [2021-12-17 03:04:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:11,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:04:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:04:11,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575855104] [2021-12-17 03:04:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575855104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:11,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:04:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113235833] [2021-12-17 03:04:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:04:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:04:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:04:11,252 INFO L87 Difference]: Start difference. First operand 732 states and 1026 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 03:04:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:12,355 INFO L93 Difference]: Finished difference Result 968 states and 1362 transitions. [2021-12-17 03:04:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:04:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-12-17 03:04:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:12,368 INFO L225 Difference]: With dead ends: 968 [2021-12-17 03:04:12,368 INFO L226 Difference]: Without dead ends: 749 [2021-12-17 03:04:12,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:04:12,369 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 567 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 1738 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:04:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-17 03:04:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 717. [2021-12-17 03:04:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 574 states have (on average 1.4059233449477353) internal successors, (807), 576 states have internal predecessors, (807), 98 states have call successors, (98), 42 states have call predecessors, (98), 44 states have return successors, (103), 98 states have call predecessors, (103), 96 states have call successors, (103) [2021-12-17 03:04:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1008 transitions. [2021-12-17 03:04:12,409 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1008 transitions. Word has length 76 [2021-12-17 03:04:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:12,409 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1008 transitions. [2021-12-17 03:04:12,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 03:04:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1008 transitions. [2021-12-17 03:04:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 03:04:12,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:12,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-17 03:04:12,411 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1589509837, now seen corresponding path program 1 times [2021-12-17 03:04:12,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343713210] [2021-12-17 03:04:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:12,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 03:04:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:04:12,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:12,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343713210] [2021-12-17 03:04:12,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343713210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:12,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:12,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:04:12,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334680462] [2021-12-17 03:04:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:12,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:04:12,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:04:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:04:12,620 INFO L87 Difference]: Start difference. First operand 717 states and 1008 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:04:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:13,214 INFO L93 Difference]: Finished difference Result 762 states and 1057 transitions. [2021-12-17 03:04:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:04:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2021-12-17 03:04:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:13,218 INFO L225 Difference]: With dead ends: 762 [2021-12-17 03:04:13,218 INFO L226 Difference]: Without dead ends: 551 [2021-12-17 03:04:13,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-17 03:04:13,219 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 220 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:13,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1717 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:04:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-12-17 03:04:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 360. [2021-12-17 03:04:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.3114186851211074) internal successors, (379), 291 states have internal predecessors, (379), 45 states have call successors, (45), 24 states have call predecessors, (45), 25 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2021-12-17 03:04:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 470 transitions. [2021-12-17 03:04:13,246 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 470 transitions. Word has length 79 [2021-12-17 03:04:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:13,247 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 470 transitions. [2021-12-17 03:04:13,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:04:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 470 transitions. [2021-12-17 03:04:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 03:04:13,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:13,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-17 03:04:13,264 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1002209784, now seen corresponding path program 1 times [2021-12-17 03:04:13,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704595918] [2021-12-17 03:04:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:13,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 03:04:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 03:04:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 03:04:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 03:04:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 03:04:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 03:04:13,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704595918] [2021-12-17 03:04:13,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704595918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:04:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424667611] [2021-12-17 03:04:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:13,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:04:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:04:13,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:04:13,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:04:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:04:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:04:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:04:15,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:04:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424667611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:15,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:04:15,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-12-17 03:04:15,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406675209] [2021-12-17 03:04:15,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:15,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:04:15,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:04:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-17 03:04:15,098 INFO L87 Difference]: Start difference. First operand 360 states and 470 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:04:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:15,121 INFO L93 Difference]: Finished difference Result 386 states and 495 transitions. [2021-12-17 03:04:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 03:04:15,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2021-12-17 03:04:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:15,123 INFO L225 Difference]: With dead ends: 386 [2021-12-17 03:04:15,123 INFO L226 Difference]: Without dead ends: 305 [2021-12-17 03:04:15,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-17 03:04:15,123 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 0 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:15,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1595 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:04:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-17 03:04:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-12-17 03:04:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 247 states have (on average 1.3481781376518218) internal successors, (333), 248 states have internal predecessors, (333), 38 states have call successors, (38), 19 states have call predecessors, (38), 19 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2021-12-17 03:04:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 409 transitions. [2021-12-17 03:04:15,143 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 409 transitions. Word has length 83 [2021-12-17 03:04:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 409 transitions. [2021-12-17 03:04:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:04:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 409 transitions. [2021-12-17 03:04:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 03:04:15,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:15,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:15,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 03:04:15,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:04:15,367 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2039873241, now seen corresponding path program 1 times [2021-12-17 03:04:15,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566616154] [2021-12-17 03:04:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:15,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:04:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 03:04:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:04:15,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566616154] [2021-12-17 03:04:15,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566616154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:15,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:15,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:04:15,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759173628] [2021-12-17 03:04:15,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:15,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:04:15,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:04:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:04:15,582 INFO L87 Difference]: Start difference. First operand 305 states and 409 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:04:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:16,165 INFO L93 Difference]: Finished difference Result 347 states and 457 transitions. [2021-12-17 03:04:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:04:16,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2021-12-17 03:04:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:16,166 INFO L225 Difference]: With dead ends: 347 [2021-12-17 03:04:16,166 INFO L226 Difference]: Without dead ends: 312 [2021-12-17 03:04:16,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:04:16,167 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 458 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:16,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 2019 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:04:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-17 03:04:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2021-12-17 03:04:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 246 states have (on average 1.3373983739837398) internal successors, (329), 247 states have internal predecessors, (329), 38 states have call successors, (38), 19 states have call predecessors, (38), 19 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2021-12-17 03:04:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 405 transitions. [2021-12-17 03:04:16,190 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 405 transitions. Word has length 93 [2021-12-17 03:04:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:16,191 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 405 transitions. [2021-12-17 03:04:16,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:04:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 405 transitions. [2021-12-17 03:04:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 03:04:16,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:16,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:16,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-17 03:04:16,192 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:16,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1310088406, now seen corresponding path program 1 times [2021-12-17 03:04:16,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:16,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712825131] [2021-12-17 03:04:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:16,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:04:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:04:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 03:04:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:04:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:04:16,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712825131] [2021-12-17 03:04:16,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712825131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:16,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:16,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:04:16,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117608444] [2021-12-17 03:04:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:16,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:04:16,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:04:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:04:16,418 INFO L87 Difference]: Start difference. First operand 304 states and 405 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:17,784 INFO L93 Difference]: Finished difference Result 616 states and 820 transitions. [2021-12-17 03:04:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 03:04:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2021-12-17 03:04:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:17,786 INFO L225 Difference]: With dead ends: 616 [2021-12-17 03:04:17,786 INFO L226 Difference]: Without dead ends: 564 [2021-12-17 03:04:17,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-12-17 03:04:17,787 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 952 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:17,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 2560 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:04:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-17 03:04:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 390. [2021-12-17 03:04:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 315 states have (on average 1.2857142857142858) internal successors, (405), 318 states have internal predecessors, (405), 46 states have call successors, (46), 27 states have call predecessors, (46), 28 states have return successors, (47), 44 states have call predecessors, (47), 45 states have call successors, (47) [2021-12-17 03:04:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 498 transitions. [2021-12-17 03:04:17,812 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 498 transitions. Word has length 114 [2021-12-17 03:04:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:17,812 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 498 transitions. [2021-12-17 03:04:17,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 498 transitions. [2021-12-17 03:04:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 03:04:17,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:17,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:17,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-17 03:04:17,813 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:17,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash 853528168, now seen corresponding path program 1 times [2021-12-17 03:04:17,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:17,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981836714] [2021-12-17 03:04:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:17,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:17,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:17,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:04:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:04:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 03:04:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:04:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:04:18,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981836714] [2021-12-17 03:04:18,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981836714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:18,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:18,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-17 03:04:18,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932325996] [2021-12-17 03:04:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:18,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 03:04:18,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 03:04:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-17 03:04:18,126 INFO L87 Difference]: Start difference. First operand 390 states and 498 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 8 states have internal predecessors, (84), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:20,598 INFO L93 Difference]: Finished difference Result 579 states and 774 transitions. [2021-12-17 03:04:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 03:04:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 8 states have internal predecessors, (84), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2021-12-17 03:04:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:20,600 INFO L225 Difference]: With dead ends: 579 [2021-12-17 03:04:20,600 INFO L226 Difference]: Without dead ends: 530 [2021-12-17 03:04:20,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-12-17 03:04:20,600 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 612 mSDsluCounter, 4609 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 5233 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:20,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 5233 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:04:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-17 03:04:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 270. [2021-12-17 03:04:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 219 states have internal predecessors, (293), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2021-12-17 03:04:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 361 transitions. [2021-12-17 03:04:20,618 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 361 transitions. Word has length 114 [2021-12-17 03:04:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:20,619 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 361 transitions. [2021-12-17 03:04:20,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 8 states have internal predecessors, (84), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 361 transitions. [2021-12-17 03:04:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 03:04:20,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:20,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:20,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-17 03:04:20,620 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash -342244749, now seen corresponding path program 1 times [2021-12-17 03:04:20,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:20,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491424062] [2021-12-17 03:04:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:20,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:04:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 03:04:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 03:04:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:04:20,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491424062] [2021-12-17 03:04:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491424062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:20,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:04:20,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393876487] [2021-12-17 03:04:20,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:04:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:04:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:04:20,872 INFO L87 Difference]: Start difference. First operand 270 states and 361 transitions. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:21,964 INFO L93 Difference]: Finished difference Result 306 states and 401 transitions. [2021-12-17 03:04:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:04:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 102 [2021-12-17 03:04:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:21,965 INFO L225 Difference]: With dead ends: 306 [2021-12-17 03:04:21,965 INFO L226 Difference]: Without dead ends: 284 [2021-12-17 03:04:21,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-17 03:04:21,966 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 102 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:21,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 2103 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:04:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-17 03:04:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2021-12-17 03:04:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 221 states have (on average 1.339366515837104) internal successors, (296), 222 states have internal predecessors, (296), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (35), 34 states have call predecessors, (35), 33 states have call successors, (35) [2021-12-17 03:04:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 365 transitions. [2021-12-17 03:04:21,986 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 365 transitions. Word has length 102 [2021-12-17 03:04:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:21,986 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 365 transitions. [2021-12-17 03:04:21,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 365 transitions. [2021-12-17 03:04:21,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 03:04:21,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:21,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:04:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-17 03:04:21,988 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -648886011, now seen corresponding path program 1 times [2021-12-17 03:04:21,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81346979] [2021-12-17 03:04:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:21,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 03:04:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 03:04:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 03:04:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:04:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:04:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 03:04:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 03:04:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 03:04:22,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81346979] [2021-12-17 03:04:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81346979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:22,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:22,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:04:22,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58360607] [2021-12-17 03:04:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:22,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:04:22,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:04:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:04:22,252 INFO L87 Difference]: Start difference. First operand 274 states and 365 transitions. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:23,020 INFO L93 Difference]: Finished difference Result 282 states and 375 transitions. [2021-12-17 03:04:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:04:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2021-12-17 03:04:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:23,021 INFO L225 Difference]: With dead ends: 282 [2021-12-17 03:04:23,021 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 03:04:23,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:04:23,021 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 340 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1878 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:23,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1878 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:04:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 03:04:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 03:04:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:04:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 03:04:23,022 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2021-12-17 03:04:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:23,022 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 03:04:23,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 03:04:23,022 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 03:04:23,024 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 03:04:23,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-17 03:04:23,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 03:05:08,253 WARN L227 SmtUtils]: Spent 42.00s on a formula simplification. DAG size of input: 255 DAG size of output: 245 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15