./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:56:14,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:56:14,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:56:14,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:56:14,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:56:14,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:56:14,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:56:14,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:56:14,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:56:14,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:56:14,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:56:14,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:56:14,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:56:14,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:56:14,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:56:14,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:56:14,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:56:14,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:56:14,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:56:14,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:56:14,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:56:14,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:56:14,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:56:14,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:56:14,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:56:14,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:56:14,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:56:14,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:56:14,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:56:14,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:56:14,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:56:14,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:56:14,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:56:14,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:56:14,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:56:14,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:56:14,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:56:14,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:56:14,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:56:14,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:56:14,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:56:14,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:56:14,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:56:14,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:56:14,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:56:14,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:56:14,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:56:14,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:56:14,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:56:14,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:56:14,137 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:56:14,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:56:14,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:56:14,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:56:14,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:56:14,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:56:14,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:56:14,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:56:14,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:56:14,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:56:14,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:56:14,140 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:56:14,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:56:14,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:56:14,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:56:14,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:56:14,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:56:14,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:56:14,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:56:14,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:56:14,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:56:14,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:56:14,148 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:56:14,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:56:14,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:56:14,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2021-12-27 21:56:14,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:56:14,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:56:14,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:56:14,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:56:14,475 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:56:14,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-27 21:56:14,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba46fc93d/d1013331f535407db394ccd209e3fbc0/FLAG5ba5f88aa [2021-12-27 21:56:15,247 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:56:15,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-27 21:56:15,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba46fc93d/d1013331f535407db394ccd209e3fbc0/FLAG5ba5f88aa [2021-12-27 21:56:15,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba46fc93d/d1013331f535407db394ccd209e3fbc0 [2021-12-27 21:56:15,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:56:15,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:56:15,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:56:15,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:56:15,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:56:15,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:56:15" (1/1) ... [2021-12-27 21:56:15,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23248be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:15, skipping insertion in model container [2021-12-27 21:56:15,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:56:15" (1/1) ... [2021-12-27 21:56:15,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:56:15,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:56:16,177 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-1.c[90162,90175] [2021-12-27 21:56:16,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:56:16,756 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:56:16,812 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-1.c[90162,90175] [2021-12-27 21:56:17,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:56:17,166 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:56:17,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17 WrapperNode [2021-12-27 21:56:17,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:56:17,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:56:17,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:56:17,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:56:17,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,404 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2021-12-27 21:56:17,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:56:17,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:56:17,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:56:17,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:56:17,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:56:17,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:56:17,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:56:17,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:56:17,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:56:17,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:56:17,644 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) [2021-12-27 21:56:17,660 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 [2021-12-27 21:56:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-27 21:56:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-27 21:56:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-27 21:56:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:56:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-27 21:56:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-27 21:56:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-27 21:56:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-27 21:56:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-27 21:56:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-27 21:56:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:56:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-27 21:56:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-27 21:56:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-27 21:56:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-27 21:56:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-27 21:56:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-27 21:56:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-27 21:56:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-27 21:56:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-27 21:56:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-27 21:56:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-27 21:56:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-27 21:56:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-27 21:56:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-27 21:56:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-27 21:56:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-27 21:56:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-27 21:56:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:56:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-27 21:56:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:56:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-27 21:56:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-27 21:56:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-27 21:56:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-27 21:56:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-27 21:56:17,688 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-27 21:56:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-27 21:56:17,688 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-27 21:56:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:56:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-27 21:56:17,689 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-27 21:56:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-27 21:56:17,689 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-27 21:56:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:56:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-27 21:56:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-27 21:56:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-27 21:56:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-27 21:56:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-27 21:56:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:56:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:56:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-27 21:56:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-27 21:56:18,107 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:56:18,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:56:18,353 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,370 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-27 21:56:18,371 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-27 21:56:18,846 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,875 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-27 21:56:18,875 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-27 21:56:18,911 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,912 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,914 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,923 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,944 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,953 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:30,383 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2021-12-27 21:56:30,383 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2021-12-27 21:56:30,383 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2021-12-27 21:56:30,383 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2021-12-27 21:56:30,384 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2021-12-27 21:56:30,411 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:30,414 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-27 21:56:30,415 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-27 21:56:30,427 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:56:30,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:56:30,443 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-27 21:56:30,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:30 BoogieIcfgContainer [2021-12-27 21:56:30,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:56:30,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:56:30,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:56:30,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:56:30,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:56:15" (1/3) ... [2021-12-27 21:56:30,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a477f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:56:30, skipping insertion in model container [2021-12-27 21:56:30,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (2/3) ... [2021-12-27 21:56:30,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a477f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:56:30, skipping insertion in model container [2021-12-27 21:56:30,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:30" (3/3) ... [2021-12-27 21:56:30,454 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2021-12-27 21:56:30,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:56:30,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:56:30,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:56:30,513 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 [2021-12-27 21:56:30,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:56:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-12-27 21:56:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:56:30,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:30,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:30,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2021-12-27 21:56:30,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:30,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860827660] [2021-12-27 21:56:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:30,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:30,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860827660] [2021-12-27 21:56:30,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860827660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:30,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:30,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:30,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338352130] [2021-12-27 21:56:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:30,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:30,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:30,967 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:31,147 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2021-12-27 21:56:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-27 21:56:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:31,170 INFO L225 Difference]: With dead ends: 1237 [2021-12-27 21:56:31,170 INFO L226 Difference]: Without dead ends: 610 [2021-12-27 21:56:31,180 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 [2021-12-27 21:56:31,187 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:31,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:56:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-27 21:56:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-12-27 21:56:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-27 21:56:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2021-12-27 21:56:31,291 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2021-12-27 21:56:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:31,291 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2021-12-27 21:56:31,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2021-12-27 21:56:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:56:31,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:31,294 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] [2021-12-27 21:56:31,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:56:31,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2021-12-27 21:56:31,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043558391] [2021-12-27 21:56:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:31,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:31,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043558391] [2021-12-27 21:56:31,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043558391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:31,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:31,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:31,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602254652] [2021-12-27 21:56:31,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:31,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:31,497 INFO L87 Difference]: Start difference. First operand 610 states and 920 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:31,661 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2021-12-27 21:56:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-27 21:56:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:31,669 INFO L225 Difference]: With dead ends: 1123 [2021-12-27 21:56:31,669 INFO L226 Difference]: Without dead ends: 882 [2021-12-27 21:56:31,673 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 [2021-12-27 21:56:31,674 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 834 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:31,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 1667 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:56:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-27 21:56:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2021-12-27 21:56:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2021-12-27 21:56:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2021-12-27 21:56:31,728 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2021-12-27 21:56:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:31,730 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2021-12-27 21:56:31,730 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, (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) [2021-12-27 21:56:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2021-12-27 21:56:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-27 21:56:31,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:31,734 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] [2021-12-27 21:56:31,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:56:31,734 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2021-12-27 21:56:31,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228895704] [2021-12-27 21:56:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:31,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:31,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228895704] [2021-12-27 21:56:31,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228895704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:31,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:31,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:31,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120798563] [2021-12-27 21:56:31,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:31,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:31,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:31,811 INFO L87 Difference]: Start difference. First operand 863 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:31,954 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2021-12-27 21:56:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-27 21:56:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:31,963 INFO L225 Difference]: With dead ends: 1823 [2021-12-27 21:56:31,964 INFO L226 Difference]: Without dead ends: 1428 [2021-12-27 21:56:31,965 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 [2021-12-27 21:56:31,966 INFO L933 BasicCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:31,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:56:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-12-27 21:56:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2021-12-27 21:56:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2021-12-27 21:56:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2021-12-27 21:56:32,012 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2021-12-27 21:56:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2021-12-27 21:56:32,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2021-12-27 21:56:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-27 21:56:32,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:32,015 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] [2021-12-27 21:56:32,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 21:56:32,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2021-12-27 21:56:32,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:32,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120837892] [2021-12-27 21:56:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:32,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:32,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120837892] [2021-12-27 21:56:32,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120837892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:32,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:32,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:32,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136498956] [2021-12-27 21:56:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:32,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:32,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:32,101 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:32,153 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2021-12-27 21:56:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-27 21:56:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:32,160 INFO L225 Difference]: With dead ends: 1670 [2021-12-27 21:56:32,160 INFO L226 Difference]: Without dead ends: 1538 [2021-12-27 21:56:32,179 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 [2021-12-27 21:56:32,180 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 837 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1549 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 [2021-12-27 21:56:32,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-27 21:56:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2021-12-27 21:56:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2021-12-27 21:56:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2021-12-27 21:56:32,230 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2021-12-27 21:56:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:32,231 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2021-12-27 21:56:32,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2021-12-27 21:56:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-27 21:56:32,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:32,232 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] [2021-12-27 21:56:32,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 21:56:32,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2021-12-27 21:56:32,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:32,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443366219] [2021-12-27 21:56:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:32,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:32,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:32,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443366219] [2021-12-27 21:56:32,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443366219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:32,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:32,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:32,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080770823] [2021-12-27 21:56:32,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:32,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:32,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:32,313 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:32,884 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2021-12-27 21:56:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-27 21:56:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:32,893 INFO L225 Difference]: With dead ends: 2654 [2021-12-27 21:56:32,893 INFO L226 Difference]: Without dead ends: 1775 [2021-12-27 21:56:32,895 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 [2021-12-27 21:56:32,896 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 1428 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:32,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1430 Valid, 1455 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 21:56:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-12-27 21:56:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2021-12-27 21:56:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-27 21:56:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2021-12-27 21:56:32,949 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2021-12-27 21:56:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:32,949 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2021-12-27 21:56:32,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2021-12-27 21:56:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-27 21:56:32,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:32,951 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] [2021-12-27 21:56:32,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 21:56:32,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2021-12-27 21:56:32,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921665344] [2021-12-27 21:56:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:32,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:33,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921665344] [2021-12-27 21:56:33,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921665344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:33,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:33,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:33,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933555514] [2021-12-27 21:56:33,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:33,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:33,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:33,025 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:33,102 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2021-12-27 21:56:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-27 21:56:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:33,109 INFO L225 Difference]: With dead ends: 1468 [2021-12-27 21:56:33,109 INFO L226 Difference]: Without dead ends: 1464 [2021-12-27 21:56:33,110 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 [2021-12-27 21:56:33,110 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:33,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-12-27 21:56:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2021-12-27 21:56:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-27 21:56:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2021-12-27 21:56:33,160 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2021-12-27 21:56:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2021-12-27 21:56:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2021-12-27 21:56:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-27 21:56:33,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:33,163 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] [2021-12-27 21:56:33,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 21:56:33,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2021-12-27 21:56:33,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:33,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931326432] [2021-12-27 21:56:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:33,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 21:56:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:33,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:33,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931326432] [2021-12-27 21:56:33,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931326432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:33,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:33,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:56:33,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632689679] [2021-12-27 21:56:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:33,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:56:33,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:56:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:33,268 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:38,081 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 [] [2021-12-27 21:56:40,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:42,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:46,211 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 [] [2021-12-27 21:56:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:46,272 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2021-12-27 21:56:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:56:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-27 21:56:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:46,293 INFO L225 Difference]: With dead ends: 2260 [2021-12-27 21:56:46,293 INFO L226 Difference]: Without dead ends: 1239 [2021-12-27 21:56:46,295 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 [2021-12-27 21:56:46,295 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 793 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 287 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:46,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2510 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 486 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-12-27 21:56:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-27 21:56:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2021-12-27 21:56:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-27 21:56:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2021-12-27 21:56:46,338 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2021-12-27 21:56:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:46,339 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2021-12-27 21:56:46,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2021-12-27 21:56:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-27 21:56:46,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:46,341 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] [2021-12-27 21:56:46,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 21:56:46,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2021-12-27 21:56:46,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122600403] [2021-12-27 21:56:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:46,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:46,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122600403] [2021-12-27 21:56:46,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122600403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:46,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:46,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:46,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461389425] [2021-12-27 21:56:46,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:46,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:46,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:46,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:46,448 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:46,810 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2021-12-27 21:56:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-27 21:56:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:46,816 INFO L225 Difference]: With dead ends: 1158 [2021-12-27 21:56:46,816 INFO L226 Difference]: Without dead ends: 1114 [2021-12-27 21:56:46,817 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 [2021-12-27 21:56:46,817 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 912 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1526 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 [2021-12-27 21:56:46,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1526 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:56:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-12-27 21:56:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2021-12-27 21:56:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-27 21:56:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2021-12-27 21:56:46,864 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2021-12-27 21:56:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:46,864 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2021-12-27 21:56:46,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2021-12-27 21:56:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:56:46,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:46,867 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] [2021-12-27 21:56:46,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 21:56:46,868 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2021-12-27 21:56:46,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969650637] [2021-12-27 21:56:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:46,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:46,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969650637] [2021-12-27 21:56:46,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969650637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:46,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:46,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:46,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145641406] [2021-12-27 21:56:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:46,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:46,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:46,966 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:47,321 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2021-12-27 21:56:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-27 21:56:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:47,326 INFO L225 Difference]: With dead ends: 1148 [2021-12-27 21:56:47,326 INFO L226 Difference]: Without dead ends: 1076 [2021-12-27 21:56:47,327 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 [2021-12-27 21:56:47,327 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 893 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:47,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1525 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:56:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-12-27 21:56:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2021-12-27 21:56:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-27 21:56:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2021-12-27 21:56:47,368 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2021-12-27 21:56:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:47,368 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2021-12-27 21:56:47,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2021-12-27 21:56:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:56:47,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:47,370 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] [2021-12-27 21:56:47,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 21:56:47,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2021-12-27 21:56:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945343023] [2021-12-27 21:56:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:47,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:47,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:47,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945343023] [2021-12-27 21:56:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945343023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:47,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:47,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:47,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339395352] [2021-12-27 21:56:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:47,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:47,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:47,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:47,444 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:47,909 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2021-12-27 21:56:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-27 21:56:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:47,918 INFO L225 Difference]: With dead ends: 1358 [2021-12-27 21:56:47,918 INFO L226 Difference]: Without dead ends: 1349 [2021-12-27 21:56:47,920 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 [2021-12-27 21:56:47,921 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 1143 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:47,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1819 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 21:56:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-12-27 21:56:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2021-12-27 21:56:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-27 21:56:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2021-12-27 21:56:47,970 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2021-12-27 21:56:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:47,970 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2021-12-27 21:56:47,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2021-12-27 21:56:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:56:47,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:47,973 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] [2021-12-27 21:56:47,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 21:56:47,974 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:47,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2021-12-27 21:56:47,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:47,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661644701] [2021-12-27 21:56:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:47,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:48,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:48,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661644701] [2021-12-27 21:56:48,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661644701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:48,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:48,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:48,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529802770] [2021-12-27 21:56:48,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:48,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:48,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:48,037 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:48,107 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2021-12-27 21:56:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-27 21:56:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:48,113 INFO L225 Difference]: With dead ends: 1192 [2021-12-27 21:56:48,113 INFO L226 Difference]: Without dead ends: 1164 [2021-12-27 21:56:48,114 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 [2021-12-27 21:56:48,114 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:48,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-27 21:56:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2021-12-27 21:56:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-27 21:56:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2021-12-27 21:56:48,172 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2021-12-27 21:56:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:48,173 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2021-12-27 21:56:48,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2021-12-27 21:56:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:56:48,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:48,175 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] [2021-12-27 21:56:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 21:56:48,176 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2021-12-27 21:56:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227028932] [2021-12-27 21:56:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:48,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:48,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:48,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227028932] [2021-12-27 21:56:48,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227028932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:48,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:48,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:48,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574639974] [2021-12-27 21:56:48,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:48,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:48,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:48,245 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:48,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:48,339 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2021-12-27 21:56:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:48,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-27 21:56:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:48,347 INFO L225 Difference]: With dead ends: 1402 [2021-12-27 21:56:48,348 INFO L226 Difference]: Without dead ends: 1389 [2021-12-27 21:56:48,348 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 [2021-12-27 21:56:48,349 INFO L933 BasicCegarLoop]: 1186 mSDtfsCounter, 353 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1998 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 [2021-12-27 21:56:48,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1998 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-12-27 21:56:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2021-12-27 21:56:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-27 21:56:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2021-12-27 21:56:48,408 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2021-12-27 21:56:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:48,408 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2021-12-27 21:56:48,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2021-12-27 21:56:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 21:56:48,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:48,410 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] [2021-12-27 21:56:48,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 21:56:48,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2021-12-27 21:56:48,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:48,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213891218] [2021-12-27 21:56:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:48,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:48,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-27 21:56:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:48,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:48,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213891218] [2021-12-27 21:56:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213891218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:48,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:48,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484781636] [2021-12-27 21:56:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:48,513 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:52,880 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 [] [2021-12-27 21:56:55,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:58,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:00,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:02,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:57:02,165 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2021-12-27 21:57:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:57:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-12-27 21:57:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:57:02,174 INFO L225 Difference]: With dead ends: 1761 [2021-12-27 21:57:02,174 INFO L226 Difference]: Without dead ends: 1129 [2021-12-27 21:57:02,177 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 [2021-12-27 21:57:02,178 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 910 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 135 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-12-27 21:57:02,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1246 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 322 Invalid, 4 Unknown, 0 Unchecked, 13.6s Time] [2021-12-27 21:57:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-27 21:57:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2021-12-27 21:57:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-27 21:57:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2021-12-27 21:57:02,233 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2021-12-27 21:57:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:57:02,233 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2021-12-27 21:57:02,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:57:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2021-12-27 21:57:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-27 21:57:02,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:57:02,235 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] [2021-12-27 21:57:02,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 21:57:02,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:57:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:57:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2021-12-27 21:57:02,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:57:02,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870413837] [2021-12-27 21:57:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:57:02,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:57:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:57:02,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:57:02,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870413837] [2021-12-27 21:57:02,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870413837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:57:02,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:57:02,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-27 21:57:02,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627668538] [2021-12-27 21:57:02,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:57:02,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-27 21:57:02,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:57:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-27 21:57:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:57:02,313 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:57:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:57:02,422 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2021-12-27 21:57:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:57:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-27 21:57:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:57:02,429 INFO L225 Difference]: With dead ends: 1082 [2021-12-27 21:57:02,429 INFO L226 Difference]: Without dead ends: 1054 [2021-12-27 21:57:02,429 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 [2021-12-27 21:57:02,430 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:57:02,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:57:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-27 21:57:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2021-12-27 21:57:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-27 21:57:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2021-12-27 21:57:02,507 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2021-12-27 21:57:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:57:02,507 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2021-12-27 21:57:02,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:57:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2021-12-27 21:57:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-27 21:57:02,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:57:02,509 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] [2021-12-27 21:57:02,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 21:57:02,510 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:57:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:57:02,510 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2021-12-27 21:57:02,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:57:02,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598950408] [2021-12-27 21:57:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:57:02,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:57:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:02,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 21:57:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:02,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-27 21:57:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:57:02,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:57:02,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598950408] [2021-12-27 21:57:02,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598950408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:57:02,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:57:02,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:57:02,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294077621] [2021-12-27 21:57:02,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:57:02,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:57:02,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:57:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:57:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:57:02,619 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:57:06,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:09,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:11,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:13,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:57:14,021 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2021-12-27 21:57:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 21:57:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-27 21:57:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:57:14,029 INFO L225 Difference]: With dead ends: 1720 [2021-12-27 21:57:14,029 INFO L226 Difference]: Without dead ends: 1185 [2021-12-27 21:57:14,031 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 [2021-12-27 21:57:14,032 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 594 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 264 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:57:14,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 2348 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 609 Invalid, 2 Unknown, 0 Unchecked, 11.3s Time] [2021-12-27 21:57:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-27 21:57:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2021-12-27 21:57:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-27 21:57:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2021-12-27 21:57:14,112 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2021-12-27 21:57:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:57:14,112 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2021-12-27 21:57:14,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:57:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2021-12-27 21:57:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-27 21:57:14,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:57:14,114 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] [2021-12-27 21:57:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-27 21:57:14,115 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:57:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:57:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2021-12-27 21:57:14,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:57:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114001015] [2021-12-27 21:57:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:57:14,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:57:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-27 21:57:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:14,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-27 21:57:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:57:14,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:57:14,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114001015] [2021-12-27 21:57:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114001015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:57:14,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:57:14,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:57:14,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551304654] [2021-12-27 21:57:14,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:57:14,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:57:14,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:57:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:57:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:57:14,212 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:57:18,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:21,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []