./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:19:01,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:19:01,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:19:01,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:19:01,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:19:01,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:19:01,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:19:01,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:19:01,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:19:01,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:19:01,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:19:01,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:19:01,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:19:01,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:19:01,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:19:01,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:19:01,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:19:01,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:19:01,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:19:01,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:19:01,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:19:01,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:19:01,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:19:01,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:19:01,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:19:01,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:19:01,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:19:01,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:19:01,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:19:01,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:19:01,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:19:01,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:19:01,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:19:01,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:19:01,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:19:01,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:19:01,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:19:01,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:19:01,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:19:01,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:19:01,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:19:01,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:19:01,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:19:01,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:19:01,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:19:01,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:19:01,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:19:01,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:19:01,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:19:01,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:19:01,369 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:19:01,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:19:01,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:19:01,371 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:19:01,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:19:01,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:19:01,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:19:01,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:19:01,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:19:01,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:19:01,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:19:01,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:19:01,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:19:01,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:19:01,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:19:01,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:19:01,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:19:01,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:19:01,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:19:01,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:19:01,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe [2021-12-21 10:19:01,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:19:01,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:19:01,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:19:01,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:19:01,575 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:19:01,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2021-12-21 10:19:01,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644bbb12b/8fca12b83da3423bb2f6749a6c8325dd/FLAGbfa5f44ea [2021-12-21 10:19:02,119 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:19:02,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2021-12-21 10:19:02,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644bbb12b/8fca12b83da3423bb2f6749a6c8325dd/FLAGbfa5f44ea [2021-12-21 10:19:02,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644bbb12b/8fca12b83da3423bb2f6749a6c8325dd [2021-12-21 10:19:02,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:19:02,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:19:02,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:19:02,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:19:02,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:19:02,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c17937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02, skipping insertion in model container [2021-12-21 10:19:02,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:19:02,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:19:02,363 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-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2021-12-21 10:19:02,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:19:02,540 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:19:02,560 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-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2021-12-21 10:19:02,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:19:02,660 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:19:02,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02 WrapperNode [2021-12-21 10:19:02,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:19:02,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:19:02,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:19:02,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:19:02,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,769 INFO L137 Inliner]: procedures = 41, calls = 107, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 1581 [2021-12-21 10:19:02,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:19:02,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:19:02,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:19:02,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:19:02,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:19:02,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:19:02,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:19:02,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:19:02,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:19:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:02,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:19:02,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:19:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-21 10:19:02,895 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-21 10:19:02,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:19:02,895 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2021-12-21 10:19:02,895 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2021-12-21 10:19:02,895 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-21 10:19:02,895 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-21 10:19:02,895 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-21 10:19:02,895 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-21 10:19:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-21 10:19:02,896 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-21 10:19:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-21 10:19:02,896 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-21 10:19:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-21 10:19:02,896 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-21 10:19:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-21 10:19:02,896 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-21 10:19:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-21 10:19:02,897 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-21 10:19:02,897 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-21 10:19:02,897 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-21 10:19:02,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:19:02,897 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-21 10:19:02,897 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-21 10:19:02,897 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-21 10:19:02,897 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-21 10:19:02,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:19:02,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:19:02,898 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-21 10:19:02,898 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-21 10:19:03,049 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:19:03,051 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:19:03,128 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,172 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-21 10:19:03,172 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-21 10:19:03,208 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,217 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-21 10:19:03,218 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-21 10:19:03,222 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,223 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,225 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,238 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,244 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,247 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,249 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,649 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: CdAudioPnp_#res#1 := 0; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume !false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##257: assume false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##286: assume !false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##285: assume false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##133: assume false; [2021-12-21 10:19:03,650 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##134: assume !false; [2021-12-21 10:19:03,651 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-12-21 10:19:03,651 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-12-21 10:19:03,651 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-21 10:19:03,651 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-21 10:19:03,651 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##331: assume false; [2021-12-21 10:19:03,651 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##332: assume !false; [2021-12-21 10:19:03,673 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:19:03,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:19:03,681 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:19:03,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:03 BoogieIcfgContainer [2021-12-21 10:19:03,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:19:03,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:19:03,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:19:03,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:19:03,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:19:02" (1/3) ... [2021-12-21 10:19:03,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b8229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:19:03, skipping insertion in model container [2021-12-21 10:19:03,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (2/3) ... [2021-12-21 10:19:03,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b8229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:19:03, skipping insertion in model container [2021-12-21 10:19:03,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:03" (3/3) ... [2021-12-21 10:19:03,689 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2021-12-21 10:19:03,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:19:03,693 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:19:03,723 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:19:03,728 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:19:03,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:19:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-21 10:19:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:19:03,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:03,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1469618272, now seen corresponding path program 1 times [2021-12-21 10:19:03,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679545055] [2021-12-21 10:19:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679545055] [2021-12-21 10:19:03,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679545055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:03,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485444011] [2021-12-21 10:19:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:03,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,905 INFO L87 Difference]: Start difference. First operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,006 INFO L93 Difference]: Finished difference Result 809 states and 1294 transitions. [2021-12-21 10:19:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:19:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,019 INFO L225 Difference]: With dead ends: 809 [2021-12-21 10:19:04,020 INFO L226 Difference]: Without dead ends: 461 [2021-12-21 10:19:04,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,027 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 8 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1351 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-21 10:19:04,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2021-12-21 10:19:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 362 states have (on average 1.4751381215469612) internal successors, (534), 378 states have internal predecessors, (534), 86 states have call successors, (86), 13 states have call predecessors, (86), 12 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-21 10:19:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 691 transitions. [2021-12-21 10:19:04,082 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 691 transitions. Word has length 13 [2021-12-21 10:19:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,082 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 691 transitions. [2021-12-21 10:19:04,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 691 transitions. [2021-12-21 10:19:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:19:04,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:19:04,084 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840026, now seen corresponding path program 1 times [2021-12-21 10:19:04,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200155632] [2021-12-21 10:19:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200155632] [2021-12-21 10:19:04,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200155632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311173477] [2021-12-21 10:19:04,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,128 INFO L87 Difference]: Start difference. First operand 461 states and 691 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,249 INFO L93 Difference]: Finished difference Result 702 states and 1030 transitions. [2021-12-21 10:19:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:19:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,255 INFO L225 Difference]: With dead ends: 702 [2021-12-21 10:19:04,255 INFO L226 Difference]: Without dead ends: 597 [2021-12-21 10:19:04,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,257 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 566 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1046 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-21 10:19:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 579. [2021-12-21 10:19:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 466 states have (on average 1.4356223175965666) internal successors, (669), 468 states have internal predecessors, (669), 92 states have call successors, (92), 21 states have call predecessors, (92), 20 states have return successors, (97), 91 states have call predecessors, (97), 81 states have call successors, (97) [2021-12-21 10:19:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 858 transitions. [2021-12-21 10:19:04,300 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 858 transitions. Word has length 15 [2021-12-21 10:19:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,300 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 858 transitions. [2021-12-21 10:19:04,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 858 transitions. [2021-12-21 10:19:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 10:19:04,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:19:04,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1723202730, now seen corresponding path program 1 times [2021-12-21 10:19:04,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127415204] [2021-12-21 10:19:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127415204] [2021-12-21 10:19:04,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127415204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425881976] [2021-12-21 10:19:04,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,349 INFO L87 Difference]: Start difference. First operand 579 states and 858 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,375 INFO L93 Difference]: Finished difference Result 858 states and 1241 transitions. [2021-12-21 10:19:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2021-12-21 10:19:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,378 INFO L225 Difference]: With dead ends: 858 [2021-12-21 10:19:04,379 INFO L226 Difference]: Without dead ends: 723 [2021-12-21 10:19:04,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,380 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 605 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 853 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-12-21 10:19:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 687. [2021-12-21 10:19:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 564 states have (on average 1.4326241134751774) internal successors, (808), 562 states have internal predecessors, (808), 93 states have call successors, (93), 26 states have call predecessors, (93), 29 states have return successors, (110), 98 states have call predecessors, (110), 85 states have call successors, (110) [2021-12-21 10:19:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1011 transitions. [2021-12-21 10:19:04,417 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1011 transitions. Word has length 19 [2021-12-21 10:19:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,417 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1011 transitions. [2021-12-21 10:19:04,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1011 transitions. [2021-12-21 10:19:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 10:19:04,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,419 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] [2021-12-21 10:19:04,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:19:04,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 981092466, now seen corresponding path program 1 times [2021-12-21 10:19:04,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124253303] [2021-12-21 10:19:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124253303] [2021-12-21 10:19:04,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124253303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95686939] [2021-12-21 10:19:04,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,450 INFO L87 Difference]: Start difference. First operand 687 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,552 INFO L93 Difference]: Finished difference Result 1290 states and 1958 transitions. [2021-12-21 10:19:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 21 [2021-12-21 10:19:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,557 INFO L225 Difference]: With dead ends: 1290 [2021-12-21 10:19:04,558 INFO L226 Difference]: Without dead ends: 1057 [2021-12-21 10:19:04,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,559 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 338 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1622 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-12-21 10:19:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 819. [2021-12-21 10:19:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 673 states have (on average 1.4338781575037147) internal successors, (965), 670 states have internal predecessors, (965), 106 states have call successors, (106), 34 states have call predecessors, (106), 39 states have return successors, (172), 114 states have call predecessors, (172), 98 states have call successors, (172) [2021-12-21 10:19:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1243 transitions. [2021-12-21 10:19:04,603 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1243 transitions. Word has length 21 [2021-12-21 10:19:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1243 transitions. [2021-12-21 10:19:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1243 transitions. [2021-12-21 10:19:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:19:04,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:19:04,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash 110549048, now seen corresponding path program 1 times [2021-12-21 10:19:04,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938147251] [2021-12-21 10:19:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938147251] [2021-12-21 10:19:04,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938147251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:04,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236706868] [2021-12-21 10:19:04,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:04,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:04,663 INFO L87 Difference]: Start difference. First operand 819 states and 1243 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,971 INFO L93 Difference]: Finished difference Result 1372 states and 2088 transitions. [2021-12-21 10:19:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 10:19:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,974 INFO L225 Difference]: With dead ends: 1372 [2021-12-21 10:19:04,975 INFO L226 Difference]: Without dead ends: 829 [2021-12-21 10:19:04,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:04,976 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 1026 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 870 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-21 10:19:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 807. [2021-12-21 10:19:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 663 states have (on average 1.4283559577677225) internal successors, (947), 660 states have internal predecessors, (947), 104 states have call successors, (104), 32 states have call predecessors, (104), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2021-12-21 10:19:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2021-12-21 10:19:05,004 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 22 [2021-12-21 10:19:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2021-12-21 10:19:05,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2021-12-21 10:19:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 10:19:05,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:19:05,006 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash -401986644, now seen corresponding path program 1 times [2021-12-21 10:19:05,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178879490] [2021-12-21 10:19:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178879490] [2021-12-21 10:19:05,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178879490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:05,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862026996] [2021-12-21 10:19:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:05,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,031 INFO L87 Difference]: Start difference. First operand 807 states and 1219 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,084 INFO L93 Difference]: Finished difference Result 810 states and 1221 transitions. [2021-12-21 10:19:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 23 [2021-12-21 10:19:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,088 INFO L225 Difference]: With dead ends: 810 [2021-12-21 10:19:05,088 INFO L226 Difference]: Without dead ends: 806 [2021-12-21 10:19:05,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,089 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 22 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1252 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 [2021-12-21 10:19:05,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1252 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-21 10:19:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2021-12-21 10:19:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 663 states have (on average 1.4253393665158371) internal successors, (945), 659 states have internal predecessors, (945), 103 states have call successors, (103), 32 states have call predecessors, (103), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2021-12-21 10:19:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1216 transitions. [2021-12-21 10:19:05,115 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1216 transitions. Word has length 23 [2021-12-21 10:19:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,116 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1216 transitions. [2021-12-21 10:19:05,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1216 transitions. [2021-12-21 10:19:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 10:19:05,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,117 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] [2021-12-21 10:19:05,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:19:05,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1420935661, now seen corresponding path program 1 times [2021-12-21 10:19:05,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696289425] [2021-12-21 10:19:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696289425] [2021-12-21 10:19:05,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696289425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939177122] [2021-12-21 10:19:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,155 INFO L87 Difference]: Start difference. First operand 806 states and 1216 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,242 INFO L93 Difference]: Finished difference Result 1220 states and 1776 transitions. [2021-12-21 10:19:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 10:19:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,246 INFO L225 Difference]: With dead ends: 1220 [2021-12-21 10:19:05,246 INFO L226 Difference]: Without dead ends: 806 [2021-12-21 10:19:05,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,248 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 318 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1941 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-21 10:19:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 681. [2021-12-21 10:19:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 559 states have (on average 1.407871198568873) internal successors, (787), 557 states have internal predecessors, (787), 88 states have call successors, (88), 28 states have call predecessors, (88), 33 states have return successors, (109), 95 states have call predecessors, (109), 81 states have call successors, (109) [2021-12-21 10:19:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 984 transitions. [2021-12-21 10:19:05,276 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 984 transitions. Word has length 28 [2021-12-21 10:19:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,276 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 984 transitions. [2021-12-21 10:19:05,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 984 transitions. [2021-12-21 10:19:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:19:05,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,278 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] [2021-12-21 10:19:05,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:19:05,278 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1565251403, now seen corresponding path program 1 times [2021-12-21 10:19:05,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885999168] [2021-12-21 10:19:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885999168] [2021-12-21 10:19:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885999168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:05,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310528637] [2021-12-21 10:19:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:05,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,307 INFO L87 Difference]: Start difference. First operand 681 states and 984 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, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,336 INFO L93 Difference]: Finished difference Result 764 states and 1091 transitions. [2021-12-21 10:19:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:05,336 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, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 10:19:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,339 INFO L225 Difference]: With dead ends: 764 [2021-12-21 10:19:05,339 INFO L226 Difference]: Without dead ends: 746 [2021-12-21 10:19:05,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,340 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 628 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 716 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-21 10:19:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2021-12-21 10:19:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 579 states have (on average 1.4162348877374784) internal successors, (820), 584 states have internal predecessors, (820), 88 states have call successors, (88), 29 states have call predecessors, (88), 35 states have return successors, (104), 89 states have call predecessors, (104), 82 states have call successors, (104) [2021-12-21 10:19:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1012 transitions. [2021-12-21 10:19:05,362 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1012 transitions. Word has length 29 [2021-12-21 10:19:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,363 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1012 transitions. [2021-12-21 10:19:05,363 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, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1012 transitions. [2021-12-21 10:19:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:05,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:19:05,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash 18714975, now seen corresponding path program 1 times [2021-12-21 10:19:05,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535988494] [2021-12-21 10:19:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 10:19:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535988494] [2021-12-21 10:19:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535988494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416626552] [2021-12-21 10:19:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,396 INFO L87 Difference]: Start difference. First operand 703 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,591 INFO L93 Difference]: Finished difference Result 999 states and 1443 transitions. [2021-12-21 10:19:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 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 35 [2021-12-21 10:19:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,594 INFO L225 Difference]: With dead ends: 999 [2021-12-21 10:19:05,595 INFO L226 Difference]: Without dead ends: 772 [2021-12-21 10:19:05,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,596 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 254 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1774 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-12-21 10:19:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 686. [2021-12-21 10:19:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4113475177304964) internal successors, (796), 571 states have internal predecessors, (796), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2021-12-21 10:19:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 983 transitions. [2021-12-21 10:19:05,619 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 983 transitions. Word has length 35 [2021-12-21 10:19:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,619 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 983 transitions. [2021-12-21 10:19:05,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 983 transitions. [2021-12-21 10:19:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 10:19:05,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,622 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] [2021-12-21 10:19:05,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:19:05,622 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1008894227, now seen corresponding path program 1 times [2021-12-21 10:19:05,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486259875] [2021-12-21 10:19:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486259875] [2021-12-21 10:19:05,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486259875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179144901] [2021-12-21 10:19:05,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,647 INFO L87 Difference]: Start difference. First operand 686 states and 983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,845 INFO L93 Difference]: Finished difference Result 744 states and 1056 transitions. [2021-12-21 10:19:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 32 [2021-12-21 10:19:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,849 INFO L225 Difference]: With dead ends: 744 [2021-12-21 10:19:05,849 INFO L226 Difference]: Without dead ends: 702 [2021-12-21 10:19:05,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,851 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 691 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 1101 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-21 10:19:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 686. [2021-12-21 10:19:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4078014184397163) internal successors, (794), 571 states have internal predecessors, (794), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2021-12-21 10:19:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 981 transitions. [2021-12-21 10:19:05,879 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 981 transitions. Word has length 32 [2021-12-21 10:19:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 981 transitions. [2021-12-21 10:19:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 981 transitions. [2021-12-21 10:19:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 10:19:05,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:19:05,882 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1838861437, now seen corresponding path program 1 times [2021-12-21 10:19:05,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300341259] [2021-12-21 10:19:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300341259] [2021-12-21 10:19:05,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300341259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928426712] [2021-12-21 10:19:05,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,908 INFO L87 Difference]: Start difference. First operand 686 states and 981 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,088 INFO L93 Difference]: Finished difference Result 771 states and 1109 transitions. [2021-12-21 10:19:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-21 10:19:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,091 INFO L225 Difference]: With dead ends: 771 [2021-12-21 10:19:06,092 INFO L226 Difference]: Without dead ends: 711 [2021-12-21 10:19:06,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:06,093 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 703 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 1256 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-12-21 10:19:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 675. [2021-12-21 10:19:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 557 states have (on average 1.4093357271095153) internal successors, (785), 564 states have internal predecessors, (785), 85 states have call successors, (85), 26 states have call predecessors, (85), 32 states have return successors, (98), 84 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 968 transitions. [2021-12-21 10:19:06,117 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 968 transitions. Word has length 36 [2021-12-21 10:19:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,118 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 968 transitions. [2021-12-21 10:19:06,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 968 transitions. [2021-12-21 10:19:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:06,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:19:06,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 138801832, now seen corresponding path program 1 times [2021-12-21 10:19:06,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275922799] [2021-12-21 10:19:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275922799] [2021-12-21 10:19:06,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275922799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:06,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009340752] [2021-12-21 10:19:06,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:06,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:06,144 INFO L87 Difference]: Start difference. First operand 675 states and 968 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,214 INFO L93 Difference]: Finished difference Result 832 states and 1184 transitions. [2021-12-21 10:19:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:19:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,217 INFO L225 Difference]: With dead ends: 832 [2021-12-21 10:19:06,217 INFO L226 Difference]: Without dead ends: 821 [2021-12-21 10:19:06,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:06,218 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 132 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1382 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-21 10:19:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 723. [2021-12-21 10:19:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 601 states have (on average 1.3860232945091515) internal successors, (833), 601 states have internal predecessors, (833), 85 states have call successors, (85), 26 states have call predecessors, (85), 36 states have return successors, (109), 95 states have call predecessors, (109), 79 states have call successors, (109) [2021-12-21 10:19:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1027 transitions. [2021-12-21 10:19:06,243 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1027 transitions. Word has length 34 [2021-12-21 10:19:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,244 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1027 transitions. [2021-12-21 10:19:06,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1027 transitions. [2021-12-21 10:19:06,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:06,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:19:06,246 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,246 INFO L85 PathProgramCache]: Analyzing trace with hash -298326298, now seen corresponding path program 1 times [2021-12-21 10:19:06,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488580743] [2021-12-21 10:19:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488580743] [2021-12-21 10:19:06,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488580743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:06,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828010049] [2021-12-21 10:19:06,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:06,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:06,279 INFO L87 Difference]: Start difference. First operand 723 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,475 INFO L93 Difference]: Finished difference Result 751 states and 1058 transitions. [2021-12-21 10:19:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:19:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,478 INFO L225 Difference]: With dead ends: 751 [2021-12-21 10:19:06,478 INFO L226 Difference]: Without dead ends: 704 [2021-12-21 10:19:06,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:06,479 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 671 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1100 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-21 10:19:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 694. [2021-12-21 10:19:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 575 states have (on average 1.391304347826087) internal successors, (800), 581 states have internal predecessors, (800), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 983 transitions. [2021-12-21 10:19:06,504 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 983 transitions. Word has length 34 [2021-12-21 10:19:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 983 transitions. [2021-12-21 10:19:06,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 983 transitions. [2021-12-21 10:19:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:06,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:19:06,506 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 452395434, now seen corresponding path program 1 times [2021-12-21 10:19:06,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38335054] [2021-12-21 10:19:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38335054] [2021-12-21 10:19:06,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38335054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:06,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88127641] [2021-12-21 10:19:06,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:06,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:06,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:06,539 INFO L87 Difference]: Start difference. First operand 694 states and 983 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,760 INFO L93 Difference]: Finished difference Result 792 states and 1125 transitions. [2021-12-21 10:19:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 35 [2021-12-21 10:19:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,764 INFO L225 Difference]: With dead ends: 792 [2021-12-21 10:19:06,764 INFO L226 Difference]: Without dead ends: 788 [2021-12-21 10:19:06,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:06,765 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 752 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1179 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-12-21 10:19:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 696. [2021-12-21 10:19:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 577 states have (on average 1.389948006932409) internal successors, (802), 583 states have internal predecessors, (802), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 985 transitions. [2021-12-21 10:19:06,792 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 985 transitions. Word has length 35 [2021-12-21 10:19:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,792 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 985 transitions. [2021-12-21 10:19:06,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 985 transitions. [2021-12-21 10:19:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:06,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:19:06,794 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash 452672264, now seen corresponding path program 1 times [2021-12-21 10:19:06,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779877856] [2021-12-21 10:19:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779877856] [2021-12-21 10:19:06,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779877856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:06,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508600308] [2021-12-21 10:19:06,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:06,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:06,845 INFO L87 Difference]: Start difference. First operand 696 states and 985 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,919 INFO L93 Difference]: Finished difference Result 709 states and 998 transitions. [2021-12-21 10:19:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 35 [2021-12-21 10:19:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,938 INFO L225 Difference]: With dead ends: 709 [2021-12-21 10:19:06,938 INFO L226 Difference]: Without dead ends: 679 [2021-12-21 10:19:06,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:06,939 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 38 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 3193 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-21 10:19:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2021-12-21 10:19:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 560 states have (on average 1.3964285714285714) internal successors, (782), 566 states have internal predecessors, (782), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 965 transitions. [2021-12-21 10:19:06,998 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 965 transitions. Word has length 35 [2021-12-21 10:19:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,998 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 965 transitions. [2021-12-21 10:19:06,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 965 transitions. [2021-12-21 10:19:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:19:07,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,000 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] [2021-12-21 10:19:07,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:19:07,001 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1733603893, now seen corresponding path program 1 times [2021-12-21 10:19:07,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195132293] [2021-12-21 10:19:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195132293] [2021-12-21 10:19:07,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195132293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:07,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114773558] [2021-12-21 10:19:07,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:07,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:07,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:07,056 INFO L87 Difference]: Start difference. First operand 679 states and 965 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,261 INFO L93 Difference]: Finished difference Result 717 states and 1030 transitions. [2021-12-21 10:19:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-21 10:19:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,264 INFO L225 Difference]: With dead ends: 717 [2021-12-21 10:19:07,264 INFO L226 Difference]: Without dead ends: 710 [2021-12-21 10:19:07,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:07,264 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 150 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1540 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-21 10:19:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2021-12-21 10:19:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3909249563699826) internal successors, (797), 579 states have internal predecessors, (797), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 980 transitions. [2021-12-21 10:19:07,293 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 980 transitions. Word has length 37 [2021-12-21 10:19:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 980 transitions. [2021-12-21 10:19:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 980 transitions. [2021-12-21 10:19:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:19:07,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,295 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] [2021-12-21 10:19:07,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:19:07,295 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash -190291046, now seen corresponding path program 1 times [2021-12-21 10:19:07,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072687989] [2021-12-21 10:19:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072687989] [2021-12-21 10:19:07,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072687989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:07,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664214712] [2021-12-21 10:19:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:07,377 INFO L87 Difference]: Start difference. First operand 692 states and 980 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,716 INFO L93 Difference]: Finished difference Result 716 states and 1026 transitions. [2021-12-21 10:19:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-21 10:19:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,719 INFO L225 Difference]: With dead ends: 716 [2021-12-21 10:19:07,719 INFO L226 Difference]: Without dead ends: 710 [2021-12-21 10:19:07,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:07,720 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 780 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1451 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-21 10:19:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2021-12-21 10:19:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3891797556719023) internal successors, (796), 579 states have internal predecessors, (796), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 979 transitions. [2021-12-21 10:19:07,750 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 979 transitions. Word has length 39 [2021-12-21 10:19:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,750 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 979 transitions. [2021-12-21 10:19:07,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 979 transitions. [2021-12-21 10:19:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 10:19:07,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,751 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] [2021-12-21 10:19:07,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:19:07,752 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1290991354, now seen corresponding path program 1 times [2021-12-21 10:19:07,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421077181] [2021-12-21 10:19:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421077181] [2021-12-21 10:19:07,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421077181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:07,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071831491] [2021-12-21 10:19:07,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:07,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:07,800 INFO L87 Difference]: Start difference. First operand 692 states and 979 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,126 INFO L93 Difference]: Finished difference Result 731 states and 1044 transitions. [2021-12-21 10:19:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-21 10:19:08,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,128 INFO L225 Difference]: With dead ends: 731 [2021-12-21 10:19:08,128 INFO L226 Difference]: Without dead ends: 699 [2021-12-21 10:19:08,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:08,129 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 158 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3968 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 3968 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-21 10:19:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 683. [2021-12-21 10:19:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3710247349823321) internal successors, (776), 572 states have internal predecessors, (776), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2021-12-21 10:19:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 955 transitions. [2021-12-21 10:19:08,170 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 955 transitions. Word has length 40 [2021-12-21 10:19:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 955 transitions. [2021-12-21 10:19:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 955 transitions. [2021-12-21 10:19:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 10:19:08,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,172 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] [2021-12-21 10:19:08,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:19:08,172 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1689117095, now seen corresponding path program 1 times [2021-12-21 10:19:08,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930572508] [2021-12-21 10:19:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930572508] [2021-12-21 10:19:08,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930572508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:08,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101980942] [2021-12-21 10:19:08,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:08,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:08,202 INFO L87 Difference]: Start difference. First operand 683 states and 955 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,593 INFO L93 Difference]: Finished difference Result 764 states and 1068 transitions. [2021-12-21 10:19:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-21 10:19:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,596 INFO L225 Difference]: With dead ends: 764 [2021-12-21 10:19:08,596 INFO L226 Difference]: Without dead ends: 728 [2021-12-21 10:19:08,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:08,596 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 789 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1511 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-21 10:19:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 683. [2021-12-21 10:19:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3692579505300353) internal successors, (775), 572 states have internal predecessors, (775), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2021-12-21 10:19:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 954 transitions. [2021-12-21 10:19:08,627 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 954 transitions. Word has length 41 [2021-12-21 10:19:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,628 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 954 transitions. [2021-12-21 10:19:08,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 954 transitions. [2021-12-21 10:19:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:19:08,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:08,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:19:08,629 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash -90091863, now seen corresponding path program 1 times [2021-12-21 10:19:08,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552610347] [2021-12-21 10:19:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 10:19:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552610347] [2021-12-21 10:19:08,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552610347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:08,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731446522] [2021-12-21 10:19:08,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:08,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:08,656 INFO L87 Difference]: Start difference. First operand 683 states and 954 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,984 INFO L93 Difference]: Finished difference Result 890 states and 1253 transitions. [2021-12-21 10:19:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-21 10:19:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,987 INFO L225 Difference]: With dead ends: 890 [2021-12-21 10:19:08,987 INFO L226 Difference]: Without dead ends: 678 [2021-12-21 10:19:08,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:08,988 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 252 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1838 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-21 10:19:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 662. [2021-12-21 10:19:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 548 states have (on average 1.364963503649635) internal successors, (748), 553 states have internal predecessors, (748), 82 states have call successors, (82), 26 states have call predecessors, (82), 31 states have return successors, (94), 82 states have call predecessors, (94), 77 states have call successors, (94) [2021-12-21 10:19:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 924 transitions. [2021-12-21 10:19:09,016 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 924 transitions. Word has length 43 [2021-12-21 10:19:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:09,016 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 924 transitions. [2021-12-21 10:19:09,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 924 transitions. [2021-12-21 10:19:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:19:09,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:09,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:09,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:19:09,018 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1421107692, now seen corresponding path program 1 times [2021-12-21 10:19:09,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:09,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564613233] [2021-12-21 10:19:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:09,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:09,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:09,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564613233] [2021-12-21 10:19:09,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564613233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:09,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:09,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:09,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139638960] [2021-12-21 10:19:09,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:09,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:09,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:09,175 INFO L87 Difference]: Start difference. First operand 662 states and 924 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:09,904 INFO L93 Difference]: Finished difference Result 692 states and 978 transitions. [2021-12-21 10:19:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-21 10:19:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:09,907 INFO L225 Difference]: With dead ends: 692 [2021-12-21 10:19:09,907 INFO L226 Difference]: Without dead ends: 676 [2021-12-21 10:19:09,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:09,908 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 98 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4437 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:09,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4437 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:19:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-21 10:19:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2021-12-21 10:19:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 547 states have (on average 1.363802559414991) internal successors, (746), 552 states have internal predecessors, (746), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2021-12-21 10:19:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 920 transitions. [2021-12-21 10:19:09,979 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 920 transitions. Word has length 43 [2021-12-21 10:19:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:09,979 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 920 transitions. [2021-12-21 10:19:09,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 920 transitions. [2021-12-21 10:19:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:09,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:09,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:09,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:19:09,981 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash 531963361, now seen corresponding path program 1 times [2021-12-21 10:19:09,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:09,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218004208] [2021-12-21 10:19:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:09,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:10,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218004208] [2021-12-21 10:19:10,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218004208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:10,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:10,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:10,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218292934] [2021-12-21 10:19:10,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:10,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:10,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:10,122 INFO L87 Difference]: Start difference. First operand 660 states and 920 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,701 INFO L93 Difference]: Finished difference Result 712 states and 998 transitions. [2021-12-21 10:19:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 10:19:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,705 INFO L225 Difference]: With dead ends: 712 [2021-12-21 10:19:10,706 INFO L226 Difference]: Without dead ends: 691 [2021-12-21 10:19:10,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-21 10:19:10,707 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 171 mSDsluCounter, 4776 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5357 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5357 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-12-21 10:19:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 659. [2021-12-21 10:19:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 546 states have (on average 1.3461538461538463) internal successors, (735), 551 states have internal predecessors, (735), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2021-12-21 10:19:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 909 transitions. [2021-12-21 10:19:10,783 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 909 transitions. Word has length 44 [2021-12-21 10:19:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,783 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 909 transitions. [2021-12-21 10:19:10,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 909 transitions. [2021-12-21 10:19:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:10,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:19:10,785 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -927803137, now seen corresponding path program 1 times [2021-12-21 10:19:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249008605] [2021-12-21 10:19:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:10,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:10,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249008605] [2021-12-21 10:19:10,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249008605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:10,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:10,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:10,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618501496] [2021-12-21 10:19:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:10,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:10,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:10,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:10,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:10,927 INFO L87 Difference]: Start difference. First operand 659 states and 909 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:11,499 INFO L93 Difference]: Finished difference Result 688 states and 962 transitions. [2021-12-21 10:19:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-21 10:19:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:11,502 INFO L225 Difference]: With dead ends: 688 [2021-12-21 10:19:11,502 INFO L226 Difference]: Without dead ends: 672 [2021-12-21 10:19:11,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:11,503 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 98 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:11,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4293 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-21 10:19:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 656. [2021-12-21 10:19:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 544 states have (on average 1.3455882352941178) internal successors, (732), 549 states have internal predecessors, (732), 80 states have call successors, (80), 26 states have call predecessors, (80), 31 states have return successors, (92), 80 states have call predecessors, (92), 75 states have call successors, (92) [2021-12-21 10:19:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 904 transitions. [2021-12-21 10:19:11,534 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 904 transitions. Word has length 44 [2021-12-21 10:19:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:11,534 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 904 transitions. [2021-12-21 10:19:11,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 904 transitions. [2021-12-21 10:19:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:11,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:11,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:19:11,536 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:11,536 INFO L85 PathProgramCache]: Analyzing trace with hash 116231593, now seen corresponding path program 1 times [2021-12-21 10:19:11,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860076802] [2021-12-21 10:19:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:11,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860076802] [2021-12-21 10:19:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860076802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:11,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606328815] [2021-12-21 10:19:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:11,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:11,602 INFO L87 Difference]: Start difference. First operand 656 states and 904 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:11,945 INFO L93 Difference]: Finished difference Result 727 states and 1001 transitions. [2021-12-21 10:19:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-21 10:19:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:11,948 INFO L225 Difference]: With dead ends: 727 [2021-12-21 10:19:11,948 INFO L226 Difference]: Without dead ends: 660 [2021-12-21 10:19:11,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:11,949 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 218 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4175 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:11,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 4175 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-21 10:19:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 644. [2021-12-21 10:19:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 535 states have (on average 1.3401869158878505) internal successors, (717), 540 states have internal predecessors, (717), 77 states have call successors, (77), 26 states have call predecessors, (77), 31 states have return successors, (89), 77 states have call predecessors, (89), 72 states have call successors, (89) [2021-12-21 10:19:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 883 transitions. [2021-12-21 10:19:11,977 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 883 transitions. Word has length 44 [2021-12-21 10:19:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:11,977 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 883 transitions. [2021-12-21 10:19:11,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 883 transitions. [2021-12-21 10:19:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:19:11,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:11,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:11,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:19:11,979 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 39637354, now seen corresponding path program 1 times [2021-12-21 10:19:11,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061557552] [2021-12-21 10:19:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:11,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061557552] [2021-12-21 10:19:12,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061557552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:12,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844941330] [2021-12-21 10:19:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:12,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:12,014 INFO L87 Difference]: Start difference. First operand 644 states and 883 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:12,310 INFO L93 Difference]: Finished difference Result 789 states and 1125 transitions. [2021-12-21 10:19:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 10:19:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:12,313 INFO L225 Difference]: With dead ends: 789 [2021-12-21 10:19:12,313 INFO L226 Difference]: Without dead ends: 695 [2021-12-21 10:19:12,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:12,315 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 134 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:12,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2225 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-21 10:19:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 651. [2021-12-21 10:19:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 540 states have (on average 1.3407407407407408) internal successors, (724), 546 states have internal predecessors, (724), 78 states have call successors, (78), 26 states have call predecessors, (78), 32 states have return successors, (96), 78 states have call predecessors, (96), 73 states have call successors, (96) [2021-12-21 10:19:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 898 transitions. [2021-12-21 10:19:12,351 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 898 transitions. Word has length 45 [2021-12-21 10:19:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:12,351 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 898 transitions. [2021-12-21 10:19:12,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 898 transitions. [2021-12-21 10:19:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:19:12,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:12,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:12,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 10:19:12,354 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash -469835736, now seen corresponding path program 1 times [2021-12-21 10:19:12,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:12,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48529127] [2021-12-21 10:19:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:12,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48529127] [2021-12-21 10:19:12,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48529127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:12,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279554978] [2021-12-21 10:19:12,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:12,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:12,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:12,428 INFO L87 Difference]: Start difference. First operand 651 states and 898 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:12,731 INFO L93 Difference]: Finished difference Result 689 states and 966 transitions. [2021-12-21 10:19:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:12,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 10:19:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:12,734 INFO L225 Difference]: With dead ends: 689 [2021-12-21 10:19:12,734 INFO L226 Difference]: Without dead ends: 669 [2021-12-21 10:19:12,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:12,735 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 245 mSDsluCounter, 2937 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:12,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 3506 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:12,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-21 10:19:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2021-12-21 10:19:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 539 states have (on average 1.339517625231911) internal successors, (722), 545 states have internal predecessors, (722), 77 states have call successors, (77), 26 states have call predecessors, (77), 32 states have return successors, (95), 77 states have call predecessors, (95), 72 states have call successors, (95) [2021-12-21 10:19:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 894 transitions. [2021-12-21 10:19:12,763 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 894 transitions. Word has length 45 [2021-12-21 10:19:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:12,763 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 894 transitions. [2021-12-21 10:19:12,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 894 transitions. [2021-12-21 10:19:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:19:12,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:12,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:12,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:19:12,769 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1759820693, now seen corresponding path program 1 times [2021-12-21 10:19:12,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:12,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919742474] [2021-12-21 10:19:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:12,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919742474] [2021-12-21 10:19:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919742474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:12,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847507550] [2021-12-21 10:19:12,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:12,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:12,816 INFO L87 Difference]: Start difference. First operand 649 states and 894 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:13,087 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2021-12-21 10:19:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:13,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-21 10:19:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:13,090 INFO L225 Difference]: With dead ends: 696 [2021-12-21 10:19:13,090 INFO L226 Difference]: Without dead ends: 661 [2021-12-21 10:19:13,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:13,091 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 166 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 3578 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:13,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 3578 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-12-21 10:19:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 641. [2021-12-21 10:19:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 533 states have (on average 1.3320825515947468) internal successors, (710), 539 states have internal predecessors, (710), 75 states have call successors, (75), 26 states have call predecessors, (75), 32 states have return successors, (93), 75 states have call predecessors, (93), 70 states have call successors, (93) [2021-12-21 10:19:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 878 transitions. [2021-12-21 10:19:13,137 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 878 transitions. Word has length 45 [2021-12-21 10:19:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:13,138 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 878 transitions. [2021-12-21 10:19:13,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 878 transitions. [2021-12-21 10:19:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:19:13,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:13,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:13,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:19:13,140 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1002239718, now seen corresponding path program 1 times [2021-12-21 10:19:13,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057382495] [2021-12-21 10:19:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:13,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:13,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057382495] [2021-12-21 10:19:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057382495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:13,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:13,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:13,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064707439] [2021-12-21 10:19:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:13,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:13,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:13,258 INFO L87 Difference]: Start difference. First operand 641 states and 878 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:13,862 INFO L93 Difference]: Finished difference Result 676 states and 943 transitions. [2021-12-21 10:19:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-12-21 10:19:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:13,865 INFO L225 Difference]: With dead ends: 676 [2021-12-21 10:19:13,865 INFO L226 Difference]: Without dead ends: 658 [2021-12-21 10:19:13,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:13,866 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 110 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:13,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 4329 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-21 10:19:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2021-12-21 10:19:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 531 states have (on average 1.3314500941619585) internal successors, (707), 537 states have internal predecessors, (707), 74 states have call successors, (74), 26 states have call predecessors, (74), 32 states have return successors, (92), 74 states have call predecessors, (92), 69 states have call successors, (92) [2021-12-21 10:19:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 873 transitions. [2021-12-21 10:19:13,892 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 873 transitions. Word has length 46 [2021-12-21 10:19:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:13,892 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 873 transitions. [2021-12-21 10:19:13,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 873 transitions. [2021-12-21 10:19:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:19:13,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:13,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:13,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:19:13,894 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash -113531146, now seen corresponding path program 1 times [2021-12-21 10:19:13,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643467439] [2021-12-21 10:19:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:13,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 10:19:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:13,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643467439] [2021-12-21 10:19:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643467439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:13,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:13,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:13,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901440690] [2021-12-21 10:19:13,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:13,938 INFO L87 Difference]: Start difference. First operand 638 states and 873 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:14,170 INFO L93 Difference]: Finished difference Result 695 states and 980 transitions. [2021-12-21 10:19:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-21 10:19:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:14,173 INFO L225 Difference]: With dead ends: 695 [2021-12-21 10:19:14,173 INFO L226 Difference]: Without dead ends: 668 [2021-12-21 10:19:14,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:14,177 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 187 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:14,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 2358 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-21 10:19:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 642. [2021-12-21 10:19:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 533 states have (on average 1.3302063789868668) internal successors, (709), 541 states have internal predecessors, (709), 74 states have call successors, (74), 26 states have call predecessors, (74), 34 states have return successors, (108), 74 states have call predecessors, (108), 69 states have call successors, (108) [2021-12-21 10:19:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 891 transitions. [2021-12-21 10:19:14,222 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 891 transitions. Word has length 46 [2021-12-21 10:19:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:14,223 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 891 transitions. [2021-12-21 10:19:14,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 891 transitions. [2021-12-21 10:19:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:19:14,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:14,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:14,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 10:19:14,225 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1400503670, now seen corresponding path program 1 times [2021-12-21 10:19:14,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:14,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580321291] [2021-12-21 10:19:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:14,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:14,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:14,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580321291] [2021-12-21 10:19:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580321291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:14,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:14,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:14,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74979196] [2021-12-21 10:19:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:14,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:14,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:14,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:14,333 INFO L87 Difference]: Start difference. First operand 642 states and 891 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:14,956 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2021-12-21 10:19:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2021-12-21 10:19:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:14,960 INFO L225 Difference]: With dead ends: 696 [2021-12-21 10:19:14,960 INFO L226 Difference]: Without dead ends: 676 [2021-12-21 10:19:14,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-21 10:19:14,961 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 170 mSDsluCounter, 4628 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:14,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 5148 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-21 10:19:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 640. [2021-12-21 10:19:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 532 states have (on average 1.3289473684210527) internal successors, (707), 540 states have internal predecessors, (707), 73 states have call successors, (73), 26 states have call predecessors, (73), 34 states have return successors, (107), 73 states have call predecessors, (107), 68 states have call successors, (107) [2021-12-21 10:19:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 887 transitions. [2021-12-21 10:19:14,992 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 887 transitions. Word has length 47 [2021-12-21 10:19:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:14,992 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 887 transitions. [2021-12-21 10:19:14,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 887 transitions. [2021-12-21 10:19:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:14,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:14,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:14,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 10:19:14,995 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -926060850, now seen corresponding path program 1 times [2021-12-21 10:19:14,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:14,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369632976] [2021-12-21 10:19:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:14,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:15,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:15,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369632976] [2021-12-21 10:19:15,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369632976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:15,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:15,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:15,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755774476] [2021-12-21 10:19:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:15,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:15,117 INFO L87 Difference]: Start difference. First operand 640 states and 887 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:15,843 INFO L93 Difference]: Finished difference Result 675 states and 952 transitions. [2021-12-21 10:19:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-12-21 10:19:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:15,848 INFO L225 Difference]: With dead ends: 675 [2021-12-21 10:19:15,848 INFO L226 Difference]: Without dead ends: 651 [2021-12-21 10:19:15,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:15,850 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 123 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:15,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4682 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-12-21 10:19:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 631. [2021-12-21 10:19:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 525 states have (on average 1.3295238095238096) internal successors, (698), 533 states have internal predecessors, (698), 71 states have call successors, (71), 26 states have call predecessors, (71), 34 states have return successors, (105), 71 states have call predecessors, (105), 66 states have call successors, (105) [2021-12-21 10:19:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 874 transitions. [2021-12-21 10:19:15,893 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 874 transitions. Word has length 54 [2021-12-21 10:19:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:15,893 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 874 transitions. [2021-12-21 10:19:15,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 874 transitions. [2021-12-21 10:19:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:15,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:15,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:15,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 10:19:15,896 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1310476923, now seen corresponding path program 1 times [2021-12-21 10:19:15,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:15,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286274574] [2021-12-21 10:19:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:15,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:16,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:16,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286274574] [2021-12-21 10:19:16,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286274574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:16,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:16,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:16,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071928938] [2021-12-21 10:19:16,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:16,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:16,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:16,021 INFO L87 Difference]: Start difference. First operand 631 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:16,706 INFO L93 Difference]: Finished difference Result 666 states and 938 transitions. [2021-12-21 10:19:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-21 10:19:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:16,709 INFO L225 Difference]: With dead ends: 666 [2021-12-21 10:19:16,709 INFO L226 Difference]: Without dead ends: 648 [2021-12-21 10:19:16,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:16,711 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 123 mSDsluCounter, 4050 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4577 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:16,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4577 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-21 10:19:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 628. [2021-12-21 10:19:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 523 states have (on average 1.3288718929254302) internal successors, (695), 531 states have internal predecessors, (695), 70 states have call successors, (70), 26 states have call predecessors, (70), 34 states have return successors, (104), 70 states have call predecessors, (104), 65 states have call successors, (104) [2021-12-21 10:19:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 869 transitions. [2021-12-21 10:19:16,756 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 869 transitions. Word has length 48 [2021-12-21 10:19:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:16,756 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 869 transitions. [2021-12-21 10:19:16,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 869 transitions. [2021-12-21 10:19:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:19:16,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:16,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:16,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 10:19:16,758 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash -631995317, now seen corresponding path program 1 times [2021-12-21 10:19:16,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:16,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596096171] [2021-12-21 10:19:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:16,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:16,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596096171] [2021-12-21 10:19:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596096171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:16,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:16,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:16,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4848155] [2021-12-21 10:19:16,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:16,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:16,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:16,914 INFO L87 Difference]: Start difference. First operand 628 states and 869 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:17,620 INFO L93 Difference]: Finished difference Result 663 states and 933 transitions. [2021-12-21 10:19:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:17,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2021-12-21 10:19:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:17,623 INFO L225 Difference]: With dead ends: 663 [2021-12-21 10:19:17,623 INFO L226 Difference]: Without dead ends: 645 [2021-12-21 10:19:17,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:17,624 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 123 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4517 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:17,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4517 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-21 10:19:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 625. [2021-12-21 10:19:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 521 states have (on average 1.328214971209213) internal successors, (692), 529 states have internal predecessors, (692), 69 states have call successors, (69), 26 states have call predecessors, (69), 34 states have return successors, (103), 69 states have call predecessors, (103), 64 states have call successors, (103) [2021-12-21 10:19:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 864 transitions. [2021-12-21 10:19:17,664 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 864 transitions. Word has length 47 [2021-12-21 10:19:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:17,665 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 864 transitions. [2021-12-21 10:19:17,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 864 transitions. [2021-12-21 10:19:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 10:19:17,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:17,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:17,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 10:19:17,667 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1897196007, now seen corresponding path program 1 times [2021-12-21 10:19:17,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:17,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645004019] [2021-12-21 10:19:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:17,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:17,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:17,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645004019] [2021-12-21 10:19:17,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645004019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:17,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:17,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:17,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049847105] [2021-12-21 10:19:17,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:17,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:17,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:17,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:17,714 INFO L87 Difference]: Start difference. First operand 625 states and 864 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 10:19:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:17,989 INFO L93 Difference]: Finished difference Result 886 states and 1230 transitions. [2021-12-21 10:19:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-21 10:19:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:18,007 INFO L225 Difference]: With dead ends: 886 [2021-12-21 10:19:18,009 INFO L226 Difference]: Without dead ends: 736 [2021-12-21 10:19:18,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:18,010 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 315 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:18,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1312 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-21 10:19:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 689. [2021-12-21 10:19:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 575 states have (on average 1.3269565217391304) internal successors, (763), 583 states have internal predecessors, (763), 72 states have call successors, (72), 30 states have call predecessors, (72), 41 states have return successors, (112), 75 states have call predecessors, (112), 68 states have call successors, (112) [2021-12-21 10:19:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 947 transitions. [2021-12-21 10:19:18,093 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 947 transitions. Word has length 50 [2021-12-21 10:19:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:18,094 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 947 transitions. [2021-12-21 10:19:18,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 10:19:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 947 transitions. [2021-12-21 10:19:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:19:18,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:18,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:18,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 10:19:18,096 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -532277969, now seen corresponding path program 1 times [2021-12-21 10:19:18,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:18,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342869740] [2021-12-21 10:19:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:18,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342869740] [2021-12-21 10:19:18,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342869740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:18,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:18,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:18,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193242704] [2021-12-21 10:19:18,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:18,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:18,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:18,238 INFO L87 Difference]: Start difference. First operand 689 states and 947 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:18,789 INFO L93 Difference]: Finished difference Result 753 states and 1042 transitions. [2021-12-21 10:19:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-12-21 10:19:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:18,792 INFO L225 Difference]: With dead ends: 753 [2021-12-21 10:19:18,792 INFO L226 Difference]: Without dead ends: 733 [2021-12-21 10:19:18,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:18,793 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 245 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 5232 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:18,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 5232 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-12-21 10:19:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 687. [2021-12-21 10:19:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 574 states have (on average 1.3257839721254356) internal successors, (761), 582 states have internal predecessors, (761), 71 states have call successors, (71), 30 states have call predecessors, (71), 41 states have return successors, (111), 74 states have call predecessors, (111), 67 states have call successors, (111) [2021-12-21 10:19:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 943 transitions. [2021-12-21 10:19:18,830 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 943 transitions. Word has length 52 [2021-12-21 10:19:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:18,830 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 943 transitions. [2021-12-21 10:19:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 943 transitions. [2021-12-21 10:19:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:19:18,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:18,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:18,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 10:19:18,832 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash 232958448, now seen corresponding path program 1 times [2021-12-21 10:19:18,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54545331] [2021-12-21 10:19:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:18,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:18,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54545331] [2021-12-21 10:19:18,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54545331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:18,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:18,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:18,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004149777] [2021-12-21 10:19:18,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:18,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:18,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:18,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:18,923 INFO L87 Difference]: Start difference. First operand 687 states and 943 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:19,553 INFO L93 Difference]: Finished difference Result 751 states and 1038 transitions. [2021-12-21 10:19:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-12-21 10:19:19,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:19,556 INFO L225 Difference]: With dead ends: 751 [2021-12-21 10:19:19,556 INFO L226 Difference]: Without dead ends: 731 [2021-12-21 10:19:19,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:19,557 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 264 mSDsluCounter, 3984 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 4487 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:19,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 4487 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-21 10:19:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 685. [2021-12-21 10:19:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 573 states have (on average 1.324607329842932) internal successors, (759), 581 states have internal predecessors, (759), 70 states have call successors, (70), 30 states have call predecessors, (70), 41 states have return successors, (110), 73 states have call predecessors, (110), 66 states have call successors, (110) [2021-12-21 10:19:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 939 transitions. [2021-12-21 10:19:19,590 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 939 transitions. Word has length 51 [2021-12-21 10:19:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:19,591 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 939 transitions. [2021-12-21 10:19:19,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 939 transitions. [2021-12-21 10:19:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:19,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:19,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:19,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 10:19:19,593 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1506455403, now seen corresponding path program 1 times [2021-12-21 10:19:19,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:19,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974042974] [2021-12-21 10:19:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:19,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:19,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974042974] [2021-12-21 10:19:19,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974042974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:19,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:19,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:19,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717683439] [2021-12-21 10:19:19,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:19,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:19,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:19,683 INFO L87 Difference]: Start difference. First operand 685 states and 939 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:20,275 INFO L93 Difference]: Finished difference Result 733 states and 1017 transitions. [2021-12-21 10:19:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:20,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-21 10:19:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:20,282 INFO L225 Difference]: With dead ends: 733 [2021-12-21 10:19:20,283 INFO L226 Difference]: Without dead ends: 713 [2021-12-21 10:19:20,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-21 10:19:20,284 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 149 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 4754 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:20,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 4754 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-12-21 10:19:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 683. [2021-12-21 10:19:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 572 states have (on average 1.3234265734265733) internal successors, (757), 580 states have internal predecessors, (757), 69 states have call successors, (69), 30 states have call predecessors, (69), 41 states have return successors, (109), 72 states have call predecessors, (109), 65 states have call successors, (109) [2021-12-21 10:19:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 935 transitions. [2021-12-21 10:19:20,349 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 935 transitions. Word has length 48 [2021-12-21 10:19:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:20,349 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 935 transitions. [2021-12-21 10:19:20,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 935 transitions. [2021-12-21 10:19:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:20,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:20,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:20,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 10:19:20,351 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -273874573, now seen corresponding path program 1 times [2021-12-21 10:19:20,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64730461] [2021-12-21 10:19:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:20,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:20,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64730461] [2021-12-21 10:19:20,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64730461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:20,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:20,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:20,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670724291] [2021-12-21 10:19:20,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:20,379 INFO L87 Difference]: Start difference. First operand 683 states and 935 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:20,543 INFO L93 Difference]: Finished difference Result 939 states and 1289 transitions. [2021-12-21 10:19:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-21 10:19:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:20,547 INFO L225 Difference]: With dead ends: 939 [2021-12-21 10:19:20,547 INFO L226 Difference]: Without dead ends: 639 [2021-12-21 10:19:20,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:20,550 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 174 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:20,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1232 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-21 10:19:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 610. [2021-12-21 10:19:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 515 states have (on average 1.3184466019417476) internal successors, (679), 521 states have internal predecessors, (679), 60 states have call successors, (60), 27 states have call predecessors, (60), 34 states have return successors, (73), 61 states have call predecessors, (73), 56 states have call successors, (73) [2021-12-21 10:19:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 812 transitions. [2021-12-21 10:19:20,594 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 812 transitions. Word has length 48 [2021-12-21 10:19:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:20,594 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 812 transitions. [2021-12-21 10:19:20,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 812 transitions. [2021-12-21 10:19:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 10:19:20,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:20,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:20,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 10:19:20,596 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1171724014, now seen corresponding path program 1 times [2021-12-21 10:19:20,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:20,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568531130] [2021-12-21 10:19:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:20,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 10:19:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:20,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568531130] [2021-12-21 10:19:20,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568531130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:20,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:20,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:20,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289724767] [2021-12-21 10:19:20,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:20,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:20,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:20,636 INFO L87 Difference]: Start difference. First operand 610 states and 812 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:20,891 INFO L93 Difference]: Finished difference Result 704 states and 925 transitions. [2021-12-21 10:19:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-21 10:19:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:20,900 INFO L225 Difference]: With dead ends: 704 [2021-12-21 10:19:20,901 INFO L226 Difference]: Without dead ends: 678 [2021-12-21 10:19:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:20,902 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 337 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:20,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 2069 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-21 10:19:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 616. [2021-12-21 10:19:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 520 states have (on average 1.3173076923076923) internal successors, (685), 526 states have internal predecessors, (685), 61 states have call successors, (61), 27 states have call predecessors, (61), 34 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2021-12-21 10:19:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 820 transitions. [2021-12-21 10:19:20,934 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 820 transitions. Word has length 50 [2021-12-21 10:19:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 820 transitions. [2021-12-21 10:19:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 820 transitions. [2021-12-21 10:19:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 10:19:20,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:20,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:20,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-21 10:19:20,936 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 850113778, now seen corresponding path program 1 times [2021-12-21 10:19:20,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:20,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457078598] [2021-12-21 10:19:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:20,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:20,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457078598] [2021-12-21 10:19:20,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457078598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:20,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:20,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:20,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314472314] [2021-12-21 10:19:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:20,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:20,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:20,989 INFO L87 Difference]: Start difference. First operand 616 states and 820 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 10:19:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,248 INFO L93 Difference]: Finished difference Result 733 states and 980 transitions. [2021-12-21 10:19:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2021-12-21 10:19:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,251 INFO L225 Difference]: With dead ends: 733 [2021-12-21 10:19:21,251 INFO L226 Difference]: Without dead ends: 628 [2021-12-21 10:19:21,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:21,252 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 191 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1190 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-21 10:19:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 616. [2021-12-21 10:19:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 520 states have (on average 1.3134615384615385) internal successors, (683), 526 states have internal predecessors, (683), 61 states have call successors, (61), 27 states have call predecessors, (61), 34 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2021-12-21 10:19:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 818 transitions. [2021-12-21 10:19:21,277 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 818 transitions. Word has length 53 [2021-12-21 10:19:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,278 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 818 transitions. [2021-12-21 10:19:21,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 10:19:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 818 transitions. [2021-12-21 10:19:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:19:21,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 10:19:21,280 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash -381678341, now seen corresponding path program 1 times [2021-12-21 10:19:21,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556514042] [2021-12-21 10:19:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 10:19:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:21,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556514042] [2021-12-21 10:19:21,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556514042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:21,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:21,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:21,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964804437] [2021-12-21 10:19:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:21,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:21,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:21,325 INFO L87 Difference]: Start difference. First operand 616 states and 818 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,743 INFO L93 Difference]: Finished difference Result 662 states and 877 transitions. [2021-12-21 10:19:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-21 10:19:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,745 INFO L225 Difference]: With dead ends: 662 [2021-12-21 10:19:21,745 INFO L226 Difference]: Without dead ends: 608 [2021-12-21 10:19:21,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:21,746 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 185 mSDsluCounter, 2650 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3125 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3125 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-12-21 10:19:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 589. [2021-12-21 10:19:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 498 states have (on average 1.2991967871485943) internal successors, (647), 504 states have internal predecessors, (647), 56 states have call successors, (56), 27 states have call predecessors, (56), 34 states have return successors, (68), 57 states have call predecessors, (68), 52 states have call successors, (68) [2021-12-21 10:19:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 771 transitions. [2021-12-21 10:19:21,770 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 771 transitions. Word has length 51 [2021-12-21 10:19:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,770 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 771 transitions. [2021-12-21 10:19:21,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 771 transitions. [2021-12-21 10:19:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:19:21,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 10:19:21,772 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1990060921, now seen corresponding path program 1 times [2021-12-21 10:19:21,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:21,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293537290] [2021-12-21 10:19:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 10:19:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:21,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:21,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293537290] [2021-12-21 10:19:21,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293537290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:21,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:21,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:21,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338195060] [2021-12-21 10:19:21,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:21,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:21,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:21,816 INFO L87 Difference]: Start difference. First operand 589 states and 771 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,076 INFO L93 Difference]: Finished difference Result 642 states and 831 transitions. [2021-12-21 10:19:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-21 10:19:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,078 INFO L225 Difference]: With dead ends: 642 [2021-12-21 10:19:22,078 INFO L226 Difference]: Without dead ends: 595 [2021-12-21 10:19:22,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:22,079 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 98 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 2043 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-21 10:19:22,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 579. [2021-12-21 10:19:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 490 states have (on average 1.2959183673469388) internal successors, (635), 496 states have internal predecessors, (635), 54 states have call successors, (54), 27 states have call predecessors, (54), 34 states have return successors, (66), 55 states have call predecessors, (66), 50 states have call successors, (66) [2021-12-21 10:19:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 755 transitions. [2021-12-21 10:19:22,106 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 755 transitions. Word has length 51 [2021-12-21 10:19:22,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,107 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 755 transitions. [2021-12-21 10:19:22,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 755 transitions. [2021-12-21 10:19:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:19:22,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 10:19:22,109 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 105801563, now seen corresponding path program 1 times [2021-12-21 10:19:22,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161439060] [2021-12-21 10:19:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 10:19:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:22,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161439060] [2021-12-21 10:19:22,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161439060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:22,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831366121] [2021-12-21 10:19:22,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:22,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:22,163 INFO L87 Difference]: Start difference. First operand 579 states and 755 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,376 INFO L93 Difference]: Finished difference Result 618 states and 801 transitions. [2021-12-21 10:19:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:22,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-21 10:19:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,378 INFO L225 Difference]: With dead ends: 618 [2021-12-21 10:19:22,378 INFO L226 Difference]: Without dead ends: 586 [2021-12-21 10:19:22,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:22,387 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 171 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1795 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-21 10:19:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 574. [2021-12-21 10:19:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 486 states have (on average 1.2962962962962963) internal successors, (630), 492 states have internal predecessors, (630), 53 states have call successors, (53), 27 states have call predecessors, (53), 34 states have return successors, (65), 54 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-21 10:19:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 748 transitions. [2021-12-21 10:19:22,414 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 748 transitions. Word has length 52 [2021-12-21 10:19:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,415 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 748 transitions. [2021-12-21 10:19:22,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 748 transitions. [2021-12-21 10:19:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:19:22,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-21 10:19:22,417 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1444104729, now seen corresponding path program 1 times [2021-12-21 10:19:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727964797] [2021-12-21 10:19:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:22,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727964797] [2021-12-21 10:19:22,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727964797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:22,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318835895] [2021-12-21 10:19:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:22,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:22,462 INFO L87 Difference]: Start difference. First operand 574 states and 748 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,802 INFO L93 Difference]: Finished difference Result 691 states and 900 transitions. [2021-12-21 10:19:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-12-21 10:19:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,806 INFO L225 Difference]: With dead ends: 691 [2021-12-21 10:19:22,806 INFO L226 Difference]: Without dead ends: 683 [2021-12-21 10:19:22,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:22,807 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 217 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1338 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-21 10:19:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 602. [2021-12-21 10:19:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 512 states have (on average 1.291015625) internal successors, (661), 518 states have internal predecessors, (661), 53 states have call successors, (53), 27 states have call predecessors, (53), 36 states have return successors, (67), 56 states have call predecessors, (67), 49 states have call successors, (67) [2021-12-21 10:19:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 781 transitions. [2021-12-21 10:19:22,843 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 781 transitions. Word has length 52 [2021-12-21 10:19:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,843 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 781 transitions. [2021-12-21 10:19:22,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 781 transitions. [2021-12-21 10:19:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 10:19:22,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-21 10:19:22,846 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2032610889, now seen corresponding path program 1 times [2021-12-21 10:19:22,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696457258] [2021-12-21 10:19:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:22,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696457258] [2021-12-21 10:19:22,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696457258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:22,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559788031] [2021-12-21 10:19:22,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:22,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:22,901 INFO L87 Difference]: Start difference. First operand 602 states and 781 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:23,397 INFO L93 Difference]: Finished difference Result 687 states and 894 transitions. [2021-12-21 10:19:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:23,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-12-21 10:19:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:23,399 INFO L225 Difference]: With dead ends: 687 [2021-12-21 10:19:23,399 INFO L226 Difference]: Without dead ends: 681 [2021-12-21 10:19:23,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:23,400 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 716 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:23,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1535 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-21 10:19:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 602. [2021-12-21 10:19:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 512 states have (on average 1.2890625) internal successors, (660), 518 states have internal predecessors, (660), 53 states have call successors, (53), 27 states have call predecessors, (53), 36 states have return successors, (67), 56 states have call predecessors, (67), 49 states have call successors, (67) [2021-12-21 10:19:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 780 transitions. [2021-12-21 10:19:23,428 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 780 transitions. Word has length 53 [2021-12-21 10:19:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:23,428 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 780 transitions. [2021-12-21 10:19:23,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 780 transitions. [2021-12-21 10:19:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 10:19:23,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:23,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:23,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 10:19:23,430 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2028580847, now seen corresponding path program 1 times [2021-12-21 10:19:23,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470960120] [2021-12-21 10:19:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:23,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:23,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470960120] [2021-12-21 10:19:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470960120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:23,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:23,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 10:19:23,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403399636] [2021-12-21 10:19:23,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:23,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 10:19:23,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 10:19:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:23,575 INFO L87 Difference]: Start difference. First operand 602 states and 780 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:24,230 INFO L93 Difference]: Finished difference Result 634 states and 819 transitions. [2021-12-21 10:19:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:19:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-12-21 10:19:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:24,231 INFO L225 Difference]: With dead ends: 634 [2021-12-21 10:19:24,232 INFO L226 Difference]: Without dead ends: 610 [2021-12-21 10:19:24,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-12-21 10:19:24,232 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 252 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:24,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 4283 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-21 10:19:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2021-12-21 10:19:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 509 states have (on average 1.2888015717092338) internal successors, (656), 515 states have internal predecessors, (656), 52 states have call successors, (52), 27 states have call predecessors, (52), 36 states have return successors, (66), 55 states have call predecessors, (66), 48 states have call successors, (66) [2021-12-21 10:19:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 774 transitions. [2021-12-21 10:19:24,277 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 774 transitions. Word has length 55 [2021-12-21 10:19:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:24,278 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 774 transitions. [2021-12-21 10:19:24,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 774 transitions. [2021-12-21 10:19:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:24,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:24,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:24,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-21 10:19:24,280 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1717160597, now seen corresponding path program 1 times [2021-12-21 10:19:24,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:24,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761064882] [2021-12-21 10:19:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:24,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 10:19:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:24,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761064882] [2021-12-21 10:19:24,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761064882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:24,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:24,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962474625] [2021-12-21 10:19:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:24,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:24,326 INFO L87 Difference]: Start difference. First operand 598 states and 774 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:24,524 INFO L93 Difference]: Finished difference Result 637 states and 820 transitions. [2021-12-21 10:19:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-21 10:19:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:24,525 INFO L225 Difference]: With dead ends: 637 [2021-12-21 10:19:24,526 INFO L226 Difference]: Without dead ends: 605 [2021-12-21 10:19:24,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:24,527 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 171 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:24,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1736 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-21 10:19:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 593. [2021-12-21 10:19:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 505 states have (on average 1.2891089108910891) internal successors, (651), 511 states have internal predecessors, (651), 51 states have call successors, (51), 27 states have call predecessors, (51), 36 states have return successors, (65), 54 states have call predecessors, (65), 47 states have call successors, (65) [2021-12-21 10:19:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 767 transitions. [2021-12-21 10:19:24,556 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 767 transitions. Word has length 54 [2021-12-21 10:19:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:24,556 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 767 transitions. [2021-12-21 10:19:24,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 767 transitions. [2021-12-21 10:19:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:24,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:24,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:24,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 10:19:24,557 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1513646241, now seen corresponding path program 1 times [2021-12-21 10:19:24,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:24,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41245370] [2021-12-21 10:19:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:24,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:24,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:24,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41245370] [2021-12-21 10:19:24,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41245370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:24,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:24,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:24,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622119796] [2021-12-21 10:19:24,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:24,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:24,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:24,640 INFO L87 Difference]: Start difference. First operand 593 states and 767 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:25,025 INFO L93 Difference]: Finished difference Result 628 states and 810 transitions. [2021-12-21 10:19:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-21 10:19:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:25,027 INFO L225 Difference]: With dead ends: 628 [2021-12-21 10:19:25,027 INFO L226 Difference]: Without dead ends: 602 [2021-12-21 10:19:25,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:25,028 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 232 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:25,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 3187 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-21 10:19:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2021-12-21 10:19:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 503 states have (on average 1.2882703777335984) internal successors, (648), 509 states have internal predecessors, (648), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2021-12-21 10:19:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 762 transitions. [2021-12-21 10:19:25,058 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 762 transitions. Word has length 54 [2021-12-21 10:19:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:25,058 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 762 transitions. [2021-12-21 10:19:25,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 762 transitions. [2021-12-21 10:19:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:25,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:25,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:25,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 10:19:25,060 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash 773886590, now seen corresponding path program 1 times [2021-12-21 10:19:25,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505629251] [2021-12-21 10:19:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:25,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:25,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:25,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505629251] [2021-12-21 10:19:25,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505629251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:25,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:25,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:25,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846698001] [2021-12-21 10:19:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:25,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:25,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:25,113 INFO L87 Difference]: Start difference. First operand 590 states and 762 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:25,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:25,592 INFO L93 Difference]: Finished difference Result 673 states and 872 transitions. [2021-12-21 10:19:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:25,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-21 10:19:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:25,594 INFO L225 Difference]: With dead ends: 673 [2021-12-21 10:19:25,594 INFO L226 Difference]: Without dead ends: 669 [2021-12-21 10:19:25,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:25,596 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 695 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:25,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1465 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-21 10:19:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 588. [2021-12-21 10:19:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 501 states have (on average 1.2874251497005988) internal successors, (645), 507 states have internal predecessors, (645), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2021-12-21 10:19:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 759 transitions. [2021-12-21 10:19:25,626 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 759 transitions. Word has length 54 [2021-12-21 10:19:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:25,626 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 759 transitions. [2021-12-21 10:19:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 759 transitions. [2021-12-21 10:19:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:25,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:25,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:25,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-21 10:19:25,630 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash 774163420, now seen corresponding path program 1 times [2021-12-21 10:19:25,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989306872] [2021-12-21 10:19:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:25,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:25,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:25,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989306872] [2021-12-21 10:19:25,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989306872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:25,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:25,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:25,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656334454] [2021-12-21 10:19:25,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:25,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:25,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:25,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:25,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:25,727 INFO L87 Difference]: Start difference. First operand 588 states and 759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:26,123 INFO L93 Difference]: Finished difference Result 610 states and 786 transitions. [2021-12-21 10:19:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-12-21 10:19:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:26,125 INFO L225 Difference]: With dead ends: 610 [2021-12-21 10:19:26,125 INFO L226 Difference]: Without dead ends: 562 [2021-12-21 10:19:26,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:26,126 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 211 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:26,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2826 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-21 10:19:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 546. [2021-12-21 10:19:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2776572668112798) internal successors, (589), 467 states have internal predecessors, (589), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2021-12-21 10:19:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 701 transitions. [2021-12-21 10:19:26,152 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 701 transitions. Word has length 54 [2021-12-21 10:19:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:26,152 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 701 transitions. [2021-12-21 10:19:26,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 701 transitions. [2021-12-21 10:19:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:26,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:26,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:26,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-21 10:19:26,154 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1350619309, now seen corresponding path program 1 times [2021-12-21 10:19:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380921654] [2021-12-21 10:19:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:26,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:26,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380921654] [2021-12-21 10:19:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380921654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:26,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:26,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937264231] [2021-12-21 10:19:26,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:26,205 INFO L87 Difference]: Start difference. First operand 546 states and 701 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:26,521 INFO L93 Difference]: Finished difference Result 607 states and 771 transitions. [2021-12-21 10:19:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-21 10:19:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:26,523 INFO L225 Difference]: With dead ends: 607 [2021-12-21 10:19:26,523 INFO L226 Difference]: Without dead ends: 576 [2021-12-21 10:19:26,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:26,524 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 187 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:26,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1863 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-12-21 10:19:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 546. [2021-12-21 10:19:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2754880694143167) internal successors, (588), 467 states have internal predecessors, (588), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2021-12-21 10:19:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 700 transitions. [2021-12-21 10:19:26,551 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 700 transitions. Word has length 56 [2021-12-21 10:19:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:26,551 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 700 transitions. [2021-12-21 10:19:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 700 transitions. [2021-12-21 10:19:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:26,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:26,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:26,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-21 10:19:26,553 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1373251563, now seen corresponding path program 1 times [2021-12-21 10:19:26,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:26,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334608534] [2021-12-21 10:19:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:26,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:26,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334608534] [2021-12-21 10:19:26,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334608534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:26,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:26,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:26,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013419985] [2021-12-21 10:19:26,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:26,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:26,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:26,665 INFO L87 Difference]: Start difference. First operand 546 states and 700 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:27,190 INFO L93 Difference]: Finished difference Result 601 states and 767 transitions. [2021-12-21 10:19:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-12-21 10:19:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:27,192 INFO L225 Difference]: With dead ends: 601 [2021-12-21 10:19:27,192 INFO L226 Difference]: Without dead ends: 571 [2021-12-21 10:19:27,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:27,193 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 276 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:27,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 3492 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-21 10:19:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 541. [2021-12-21 10:19:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 457 states have (on average 1.2713347921225382) internal successors, (581), 463 states have internal predecessors, (581), 49 states have call successors, (49), 27 states have call predecessors, (49), 34 states have return successors, (60), 50 states have call predecessors, (60), 45 states have call successors, (60) [2021-12-21 10:19:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 690 transitions. [2021-12-21 10:19:27,219 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 690 transitions. Word has length 56 [2021-12-21 10:19:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:27,220 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 690 transitions. [2021-12-21 10:19:27,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 690 transitions. [2021-12-21 10:19:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:27,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:27,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:27,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-21 10:19:27,221 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -801787505, now seen corresponding path program 1 times [2021-12-21 10:19:27,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248087782] [2021-12-21 10:19:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:27,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:27,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:27,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248087782] [2021-12-21 10:19:27,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248087782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:27,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:27,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:27,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141137678] [2021-12-21 10:19:27,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:27,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:27,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:27,274 INFO L87 Difference]: Start difference. First operand 541 states and 690 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:27,558 INFO L93 Difference]: Finished difference Result 584 states and 740 transitions. [2021-12-21 10:19:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-21 10:19:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:27,560 INFO L225 Difference]: With dead ends: 584 [2021-12-21 10:19:27,560 INFO L226 Difference]: Without dead ends: 547 [2021-12-21 10:19:27,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:27,561 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 261 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:27,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1525 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-21 10:19:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 535. [2021-12-21 10:19:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 452 states have (on average 1.2721238938053097) internal successors, (575), 458 states have internal predecessors, (575), 48 states have call successors, (48), 27 states have call predecessors, (48), 34 states have return successors, (59), 49 states have call predecessors, (59), 44 states have call successors, (59) [2021-12-21 10:19:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 682 transitions. [2021-12-21 10:19:27,589 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 682 transitions. Word has length 56 [2021-12-21 10:19:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:27,589 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 682 transitions. [2021-12-21 10:19:27,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 682 transitions. [2021-12-21 10:19:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:27,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:27,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:27,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-21 10:19:27,591 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1511727278, now seen corresponding path program 1 times [2021-12-21 10:19:27,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:27,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893751591] [2021-12-21 10:19:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:27,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 10:19:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:27,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893751591] [2021-12-21 10:19:27,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893751591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:27,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:27,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:27,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081305594] [2021-12-21 10:19:27,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:27,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:27,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:27,641 INFO L87 Difference]: Start difference. First operand 535 states and 682 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:27,929 INFO L93 Difference]: Finished difference Result 578 states and 732 transitions. [2021-12-21 10:19:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:27,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-12-21 10:19:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:27,931 INFO L225 Difference]: With dead ends: 578 [2021-12-21 10:19:27,931 INFO L226 Difference]: Without dead ends: 535 [2021-12-21 10:19:27,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:27,932 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 168 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:27,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1894 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-21 10:19:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2021-12-21 10:19:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 441 states have (on average 1.2675736961451247) internal successors, (559), 447 states have internal predecessors, (559), 47 states have call successors, (47), 27 states have call predecessors, (47), 34 states have return successors, (58), 48 states have call predecessors, (58), 43 states have call successors, (58) [2021-12-21 10:19:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 664 transitions. [2021-12-21 10:19:27,974 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 664 transitions. Word has length 58 [2021-12-21 10:19:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:27,974 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 664 transitions. [2021-12-21 10:19:27,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 664 transitions. [2021-12-21 10:19:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 10:19:27,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:27,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:27,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-21 10:19:27,976 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1341431007, now seen corresponding path program 1 times [2021-12-21 10:19:27,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:27,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930985419] [2021-12-21 10:19:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:27,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 10:19:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:28,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930985419] [2021-12-21 10:19:28,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930985419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:28,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:28,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:28,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619358056] [2021-12-21 10:19:28,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:28,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:28,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:28,073 INFO L87 Difference]: Start difference. First operand 523 states and 664 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:28,652 INFO L93 Difference]: Finished difference Result 571 states and 720 transitions. [2021-12-21 10:19:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:28,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-12-21 10:19:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:28,654 INFO L225 Difference]: With dead ends: 571 [2021-12-21 10:19:28,654 INFO L226 Difference]: Without dead ends: 551 [2021-12-21 10:19:28,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:28,655 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 249 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 3515 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:28,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 3515 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-12-21 10:19:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 521. [2021-12-21 10:19:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 440 states have (on average 1.2659090909090909) internal successors, (557), 446 states have internal predecessors, (557), 46 states have call successors, (46), 27 states have call predecessors, (46), 34 states have return successors, (57), 47 states have call predecessors, (57), 42 states have call successors, (57) [2021-12-21 10:19:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 660 transitions. [2021-12-21 10:19:28,680 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 660 transitions. Word has length 59 [2021-12-21 10:19:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 660 transitions. [2021-12-21 10:19:28,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 660 transitions. [2021-12-21 10:19:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:19:28,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:28,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:28,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-21 10:19:28,682 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash 477751716, now seen corresponding path program 1 times [2021-12-21 10:19:28,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:28,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425476058] [2021-12-21 10:19:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:28,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 10:19:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:28,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:28,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425476058] [2021-12-21 10:19:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425476058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:28,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:28,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:28,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852417818] [2021-12-21 10:19:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:28,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:28,798 INFO L87 Difference]: Start difference. First operand 521 states and 660 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:29,316 INFO L93 Difference]: Finished difference Result 549 states and 694 transitions. [2021-12-21 10:19:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-21 10:19:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:29,318 INFO L225 Difference]: With dead ends: 549 [2021-12-21 10:19:29,318 INFO L226 Difference]: Without dead ends: 531 [2021-12-21 10:19:29,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:29,318 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 115 mSDsluCounter, 2538 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:29,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 2887 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-21 10:19:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 519. [2021-12-21 10:19:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 439 states have (on average 1.2642369020501139) internal successors, (555), 445 states have internal predecessors, (555), 45 states have call successors, (45), 27 states have call predecessors, (45), 34 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2021-12-21 10:19:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 656 transitions. [2021-12-21 10:19:29,342 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 656 transitions. Word has length 57 [2021-12-21 10:19:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:29,343 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 656 transitions. [2021-12-21 10:19:29,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 656 transitions. [2021-12-21 10:19:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:29,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:29,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:29,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-21 10:19:29,344 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash 999008539, now seen corresponding path program 1 times [2021-12-21 10:19:29,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:29,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671495276] [2021-12-21 10:19:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:29,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:29,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:29,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671495276] [2021-12-21 10:19:29,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671495276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:29,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:29,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:29,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854739452] [2021-12-21 10:19:29,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:29,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:29,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:29,443 INFO L87 Difference]: Start difference. First operand 519 states and 656 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:30,467 INFO L93 Difference]: Finished difference Result 1057 states and 1338 transitions. [2021-12-21 10:19:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 10:19:30,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-12-21 10:19:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:30,470 INFO L225 Difference]: With dead ends: 1057 [2021-12-21 10:19:30,470 INFO L226 Difference]: Without dead ends: 940 [2021-12-21 10:19:30,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 10:19:30,471 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 943 mSDsluCounter, 2077 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:30,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 2481 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-12-21 10:19:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 716. [2021-12-21 10:19:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 601 states have (on average 1.276206322795341) internal successors, (767), 614 states have internal predecessors, (767), 63 states have call successors, (63), 40 states have call predecessors, (63), 51 states have return successors, (82), 61 states have call predecessors, (82), 59 states have call successors, (82) [2021-12-21 10:19:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 912 transitions. [2021-12-21 10:19:30,528 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 912 transitions. Word has length 58 [2021-12-21 10:19:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:30,528 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 912 transitions. [2021-12-21 10:19:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 912 transitions. [2021-12-21 10:19:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:30,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:30,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:30,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-21 10:19:30,530 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1875027545, now seen corresponding path program 1 times [2021-12-21 10:19:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577898249] [2021-12-21 10:19:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:30,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:30,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577898249] [2021-12-21 10:19:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577898249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:30,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:30,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172146390] [2021-12-21 10:19:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:30,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:30,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:30,572 INFO L87 Difference]: Start difference. First operand 716 states and 912 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:31,090 INFO L93 Difference]: Finished difference Result 1041 states and 1317 transitions. [2021-12-21 10:19:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-12-21 10:19:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:31,093 INFO L225 Difference]: With dead ends: 1041 [2021-12-21 10:19:31,093 INFO L226 Difference]: Without dead ends: 957 [2021-12-21 10:19:31,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:31,094 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 1092 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:31,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 1864 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-12-21 10:19:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 532. [2021-12-21 10:19:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 451 states have (on average 1.2594235033259424) internal successors, (568), 456 states have internal predecessors, (568), 45 states have call successors, (45), 29 states have call predecessors, (45), 35 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2021-12-21 10:19:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 669 transitions. [2021-12-21 10:19:31,132 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 669 transitions. Word has length 58 [2021-12-21 10:19:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:31,132 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 669 transitions. [2021-12-21 10:19:31,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 669 transitions. [2021-12-21 10:19:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:19:31,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:31,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:31,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-21 10:19:31,133 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1125550286, now seen corresponding path program 1 times [2021-12-21 10:19:31,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155554116] [2021-12-21 10:19:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:31,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 10:19:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:31,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:31,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155554116] [2021-12-21 10:19:31,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155554116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:31,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:31,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:31,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32540710] [2021-12-21 10:19:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:31,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:31,254 INFO L87 Difference]: Start difference. First operand 532 states and 669 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:31,807 INFO L93 Difference]: Finished difference Result 567 states and 713 transitions. [2021-12-21 10:19:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-12-21 10:19:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:31,809 INFO L225 Difference]: With dead ends: 567 [2021-12-21 10:19:31,809 INFO L226 Difference]: Without dead ends: 535 [2021-12-21 10:19:31,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:31,809 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 303 mSDsluCounter, 2663 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:31,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 3024 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-21 10:19:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2021-12-21 10:19:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 444 states have (on average 1.2567567567567568) internal successors, (558), 449 states have internal predecessors, (558), 43 states have call successors, (43), 29 states have call predecessors, (43), 35 states have return successors, (53), 44 states have call predecessors, (53), 39 states have call successors, (53) [2021-12-21 10:19:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2021-12-21 10:19:31,844 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 60 [2021-12-21 10:19:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:31,845 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2021-12-21 10:19:31,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2021-12-21 10:19:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:31,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:31,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:31,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-21 10:19:31,846 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2088220112, now seen corresponding path program 1 times [2021-12-21 10:19:31,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:31,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308481020] [2021-12-21 10:19:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:31,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 10:19:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308481020] [2021-12-21 10:19:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308481020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:31,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:31,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658215520] [2021-12-21 10:19:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:31,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:31,892 INFO L87 Difference]: Start difference. First operand 523 states and 654 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:32,098 INFO L93 Difference]: Finished difference Result 562 states and 699 transitions. [2021-12-21 10:19:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:32,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2021-12-21 10:19:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:32,100 INFO L225 Difference]: With dead ends: 562 [2021-12-21 10:19:32,100 INFO L226 Difference]: Without dead ends: 527 [2021-12-21 10:19:32,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:32,101 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 92 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:32,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1614 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-21 10:19:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 515. [2021-12-21 10:19:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.2562929061784898) internal successors, (549), 442 states have internal predecessors, (549), 42 states have call successors, (42), 29 states have call predecessors, (42), 35 states have return successors, (51), 43 states have call predecessors, (51), 38 states have call successors, (51) [2021-12-21 10:19:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 642 transitions. [2021-12-21 10:19:32,150 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 642 transitions. Word has length 58 [2021-12-21 10:19:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:32,150 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 642 transitions. [2021-12-21 10:19:32,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:19:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 642 transitions. [2021-12-21 10:19:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:19:32,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:32,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:32,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-21 10:19:32,152 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1074633973, now seen corresponding path program 1 times [2021-12-21 10:19:32,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519864656] [2021-12-21 10:19:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:32,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 10:19:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:19:32,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:32,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519864656] [2021-12-21 10:19:32,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519864656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:32,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:32,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:32,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548464858] [2021-12-21 10:19:32,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:32,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:32,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:32,207 INFO L87 Difference]: Start difference. First operand 515 states and 642 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:32,394 INFO L93 Difference]: Finished difference Result 554 states and 687 transitions. [2021-12-21 10:19:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2021-12-21 10:19:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:32,396 INFO L225 Difference]: With dead ends: 554 [2021-12-21 10:19:32,396 INFO L226 Difference]: Without dead ends: 517 [2021-12-21 10:19:32,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:32,396 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 156 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:32,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1394 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-21 10:19:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 505. [2021-12-21 10:19:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 429 states have (on average 1.2564102564102564) internal successors, (539), 434 states have internal predecessors, (539), 40 states have call successors, (40), 29 states have call predecessors, (40), 35 states have return successors, (49), 41 states have call predecessors, (49), 36 states have call successors, (49) [2021-12-21 10:19:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 628 transitions. [2021-12-21 10:19:32,428 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 628 transitions. Word has length 60 [2021-12-21 10:19:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:32,428 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 628 transitions. [2021-12-21 10:19:32,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 628 transitions. [2021-12-21 10:19:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:19:32,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:32,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:32,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-21 10:19:32,430 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash 175179390, now seen corresponding path program 1 times [2021-12-21 10:19:32,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:32,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938422029] [2021-12-21 10:19:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:32,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:32,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938422029] [2021-12-21 10:19:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938422029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:32,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788751940] [2021-12-21 10:19:32,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:32,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:32,525 INFO L87 Difference]: Start difference. First operand 505 states and 628 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:33,269 INFO L93 Difference]: Finished difference Result 892 states and 1122 transitions. [2021-12-21 10:19:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 10:19:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-12-21 10:19:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:33,272 INFO L225 Difference]: With dead ends: 892 [2021-12-21 10:19:33,272 INFO L226 Difference]: Without dead ends: 787 [2021-12-21 10:19:33,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-21 10:19:33,272 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 545 mSDsluCounter, 2830 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:33,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 3390 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-21 10:19:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 399. [2021-12-21 10:19:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 335 states have (on average 1.2686567164179106) internal successors, (425), 339 states have internal predecessors, (425), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2021-12-21 10:19:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 502 transitions. [2021-12-21 10:19:33,323 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 502 transitions. Word has length 60 [2021-12-21 10:19:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:33,323 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 502 transitions. [2021-12-21 10:19:33,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:19:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 502 transitions. [2021-12-21 10:19:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 10:19:33,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:33,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:33,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-21 10:19:33,325 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268864, now seen corresponding path program 1 times [2021-12-21 10:19:33,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:33,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650785117] [2021-12-21 10:19:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:33,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 10:19:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:33,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650785117] [2021-12-21 10:19:33,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650785117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:33,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:33,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:33,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357069301] [2021-12-21 10:19:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:33,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:33,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:33,441 INFO L87 Difference]: Start difference. First operand 399 states and 502 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:33,919 INFO L93 Difference]: Finished difference Result 431 states and 540 transitions. [2021-12-21 10:19:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2021-12-21 10:19:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:33,920 INFO L225 Difference]: With dead ends: 431 [2021-12-21 10:19:33,920 INFO L226 Difference]: Without dead ends: 409 [2021-12-21 10:19:33,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:33,921 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 194 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:33,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 2448 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-21 10:19:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 397. [2021-12-21 10:19:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 333 states have (on average 1.2672672672672673) internal successors, (422), 337 states have internal predecessors, (422), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2021-12-21 10:19:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 499 transitions. [2021-12-21 10:19:33,953 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 499 transitions. Word has length 62 [2021-12-21 10:19:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:33,953 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 499 transitions. [2021-12-21 10:19:33,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 499 transitions. [2021-12-21 10:19:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 10:19:33,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:33,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:33,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-21 10:19:33,955 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 224602701, now seen corresponding path program 1 times [2021-12-21 10:19:33,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:33,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572737589] [2021-12-21 10:19:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:33,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 10:19:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:34,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572737589] [2021-12-21 10:19:34,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572737589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:34,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:34,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:34,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443999999] [2021-12-21 10:19:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:34,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:34,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:34,074 INFO L87 Difference]: Start difference. First operand 397 states and 499 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:34,369 INFO L93 Difference]: Finished difference Result 594 states and 758 transitions. [2021-12-21 10:19:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:34,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-12-21 10:19:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:34,371 INFO L225 Difference]: With dead ends: 594 [2021-12-21 10:19:34,372 INFO L226 Difference]: Without dead ends: 402 [2021-12-21 10:19:34,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:34,372 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 236 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:34,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1623 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-21 10:19:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2021-12-21 10:19:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 326 states have (on average 1.2607361963190185) internal successors, (411), 330 states have internal predecessors, (411), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2021-12-21 10:19:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 488 transitions. [2021-12-21 10:19:34,408 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 488 transitions. Word has length 64 [2021-12-21 10:19:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:34,408 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 488 transitions. [2021-12-21 10:19:34,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 488 transitions. [2021-12-21 10:19:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 10:19:34,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:34,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:34,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-21 10:19:34,409 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1555287307, now seen corresponding path program 1 times [2021-12-21 10:19:34,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648885887] [2021-12-21 10:19:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:34,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 10:19:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:34,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648885887] [2021-12-21 10:19:34,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648885887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:34,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:34,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:34,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439766826] [2021-12-21 10:19:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:34,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:34,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:34,459 INFO L87 Difference]: Start difference. First operand 390 states and 488 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:34,673 INFO L93 Difference]: Finished difference Result 423 states and 525 transitions. [2021-12-21 10:19:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2021-12-21 10:19:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:34,674 INFO L225 Difference]: With dead ends: 423 [2021-12-21 10:19:34,674 INFO L226 Difference]: Without dead ends: 373 [2021-12-21 10:19:34,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:34,675 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 121 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:34,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1142 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-21 10:19:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 361. [2021-12-21 10:19:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 303 states have (on average 1.2640264026402641) internal successors, (383), 307 states have internal predecessors, (383), 30 states have call successors, (30), 24 states have call predecessors, (30), 27 states have return successors, (36), 29 states have call predecessors, (36), 27 states have call successors, (36) [2021-12-21 10:19:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 449 transitions. [2021-12-21 10:19:34,704 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 449 transitions. Word has length 66 [2021-12-21 10:19:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:34,704 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 449 transitions. [2021-12-21 10:19:34,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 449 transitions. [2021-12-21 10:19:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 10:19:34,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:34,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-21 10:19:34,705 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1823600415, now seen corresponding path program 1 times [2021-12-21 10:19:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:34,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949422157] [2021-12-21 10:19:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:34,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 10:19:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 10:19:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:19:34,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949422157] [2021-12-21 10:19:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949422157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841234593] [2021-12-21 10:19:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:34,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:34,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:34,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:19:34,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:19:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:19:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:19:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:35,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:19:35,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841234593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:35,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:19:35,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-21 10:19:35,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359019757] [2021-12-21 10:19:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:35,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:35,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:35,134 INFO L87 Difference]: Start difference. First operand 361 states and 449 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:35,188 INFO L93 Difference]: Finished difference Result 384 states and 471 transitions. [2021-12-21 10:19:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2021-12-21 10:19:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:35,189 INFO L225 Difference]: With dead ends: 384 [2021-12-21 10:19:35,189 INFO L226 Difference]: Without dead ends: 332 [2021-12-21 10:19:35,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:35,190 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 0 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:35,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 919 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-21 10:19:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-12-21 10:19:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 280 states have (on average 1.275) internal successors, (357), 283 states have internal predecessors, (357), 27 states have call successors, (27), 22 states have call predecessors, (27), 24 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-21 10:19:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 416 transitions. [2021-12-21 10:19:35,216 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 416 transitions. Word has length 62 [2021-12-21 10:19:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:35,216 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 416 transitions. [2021-12-21 10:19:35,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:19:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 416 transitions. [2021-12-21 10:19:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 10:19:35,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:35,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:35,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:19:35,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-21 10:19:35,435 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2069212948, now seen corresponding path program 1 times [2021-12-21 10:19:35,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:35,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177615406] [2021-12-21 10:19:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:35,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:35,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 10:19:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:35,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:35,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:35,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177615406] [2021-12-21 10:19:35,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177615406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:35,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:35,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:35,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800513401] [2021-12-21 10:19:35,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:35,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:35,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:35,558 INFO L87 Difference]: Start difference. First operand 332 states and 416 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 10:19:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:36,038 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2021-12-21 10:19:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:36,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2021-12-21 10:19:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:36,039 INFO L225 Difference]: With dead ends: 346 [2021-12-21 10:19:36,039 INFO L226 Difference]: Without dead ends: 270 [2021-12-21 10:19:36,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:19:36,040 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 154 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:36,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1701 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-21 10:19:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-12-21 10:19:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.3) internal successors, (286), 222 states have internal predecessors, (286), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-21 10:19:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 336 transitions. [2021-12-21 10:19:36,060 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 336 transitions. Word has length 64 [2021-12-21 10:19:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:36,060 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 336 transitions. [2021-12-21 10:19:36,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 10:19:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 336 transitions. [2021-12-21 10:19:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 10:19:36,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:36,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:36,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-21 10:19:36,062 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash 585691284, now seen corresponding path program 1 times [2021-12-21 10:19:36,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435964101] [2021-12-21 10:19:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:36,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:36,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435964101] [2021-12-21 10:19:36,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435964101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:36,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:36,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:36,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737600798] [2021-12-21 10:19:36,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:36,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:36,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:36,191 INFO L87 Difference]: Start difference. First operand 264 states and 336 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 10:19:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:36,426 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2021-12-21 10:19:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2021-12-21 10:19:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:36,428 INFO L225 Difference]: With dead ends: 455 [2021-12-21 10:19:36,428 INFO L226 Difference]: Without dead ends: 270 [2021-12-21 10:19:36,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:19:36,429 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 218 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:36,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 733 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-21 10:19:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-12-21 10:19:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 222 states have internal predecessors, (285), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-21 10:19:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2021-12-21 10:19:36,450 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 68 [2021-12-21 10:19:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:36,450 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2021-12-21 10:19:36,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 10:19:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2021-12-21 10:19:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 10:19:36,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:36,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:36,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-21 10:19:36,452 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1800918031, now seen corresponding path program 1 times [2021-12-21 10:19:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743943568] [2021-12-21 10:19:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:36,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:36,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:36,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743943568] [2021-12-21 10:19:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743943568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:36,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:36,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321362369] [2021-12-21 10:19:36,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:36,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:36,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:36,525 INFO L87 Difference]: Start difference. First operand 264 states and 335 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:19:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:36,721 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2021-12-21 10:19:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:36,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-12-21 10:19:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:36,722 INFO L225 Difference]: With dead ends: 343 [2021-12-21 10:19:36,722 INFO L226 Difference]: Without dead ends: 216 [2021-12-21 10:19:36,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:36,723 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 97 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:36,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 758 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-21 10:19:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2021-12-21 10:19:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 146 states have internal predecessors, (179), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2021-12-21 10:19:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-12-21 10:19:36,745 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 70 [2021-12-21 10:19:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:36,745 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-12-21 10:19:36,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:19:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-12-21 10:19:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 10:19:36,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:36,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-21 10:19:36,746 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1069664757, now seen corresponding path program 1 times [2021-12-21 10:19:36,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176829233] [2021-12-21 10:19:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 10:19:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:36,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:36,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176829233] [2021-12-21 10:19:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176829233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:36,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:36,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:36,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968422083] [2021-12-21 10:19:36,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:36,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:36,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:36,832 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 10:19:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:37,018 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2021-12-21 10:19:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2021-12-21 10:19:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:37,019 INFO L225 Difference]: With dead ends: 224 [2021-12-21 10:19:37,019 INFO L226 Difference]: Without dead ends: 185 [2021-12-21 10:19:37,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:37,020 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 219 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:37,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 862 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-21 10:19:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2021-12-21 10:19:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 144 states have internal predecessors, (172), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2021-12-21 10:19:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2021-12-21 10:19:37,035 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 84 [2021-12-21 10:19:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:37,035 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2021-12-21 10:19:37,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 10:19:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2021-12-21 10:19:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 10:19:37,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:37,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:37,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-21 10:19:37,037 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1463540250, now seen corresponding path program 1 times [2021-12-21 10:19:37,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:37,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728154653] [2021-12-21 10:19:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:37,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 10:19:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:37,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728154653] [2021-12-21 10:19:37,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728154653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:37,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:37,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:37,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142454299] [2021-12-21 10:19:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:37,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:37,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:37,138 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 10:19:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:37,330 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2021-12-21 10:19:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2021-12-21 10:19:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:37,331 INFO L225 Difference]: With dead ends: 201 [2021-12-21 10:19:37,331 INFO L226 Difference]: Without dead ends: 153 [2021-12-21 10:19:37,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:19:37,331 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 136 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:37,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 989 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-21 10:19:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2021-12-21 10:19:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 117 states have internal predecessors, (135), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-21 10:19:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-12-21 10:19:37,344 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 86 [2021-12-21 10:19:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:37,344 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-12-21 10:19:37,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 10:19:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-12-21 10:19:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 10:19:37,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:37,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:37,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-21 10:19:37,346 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1416419599, now seen corresponding path program 1 times [2021-12-21 10:19:37,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:37,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238785812] [2021-12-21 10:19:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:37,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 10:19:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 10:19:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:19:37,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:37,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238785812] [2021-12-21 10:19:37,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238785812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:37,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119426214] [2021-12-21 10:19:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:37,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:37,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:19:37,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:19:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:19:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:19:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:19:37,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:19:37,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119426214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:37,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:19:37,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-21 10:19:37,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54213900] [2021-12-21 10:19:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:37,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:37,697 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:37,717 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2021-12-21 10:19:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-12-21 10:19:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:37,718 INFO L225 Difference]: With dead ends: 205 [2021-12-21 10:19:37,718 INFO L226 Difference]: Without dead ends: 170 [2021-12-21 10:19:37,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:37,718 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 16 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:37,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 236 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-21 10:19:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-12-21 10:19:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.152) internal successors, (144), 125 states have internal predecessors, (144), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-21 10:19:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2021-12-21 10:19:37,731 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 103 [2021-12-21 10:19:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:37,731 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2021-12-21 10:19:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2021-12-21 10:19:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 10:19:37,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:37,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:37,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:19:37,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-12-21 10:19:37,950 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -479392400, now seen corresponding path program 1 times [2021-12-21 10:19:37,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:37,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703838554] [2021-12-21 10:19:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:37,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 10:19:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 10:19:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:19:38,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703838554] [2021-12-21 10:19:38,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703838554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304526379] [2021-12-21 10:19:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:38,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:38,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:19:38,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:19:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:19:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:19:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:19:38,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:19:38,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304526379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:38,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:19:38,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-21 10:19:38,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532696610] [2021-12-21 10:19:38,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:38,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:38,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:38,324 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:38,345 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2021-12-21 10:19:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-12-21 10:19:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:38,347 INFO L225 Difference]: With dead ends: 203 [2021-12-21 10:19:38,347 INFO L226 Difference]: Without dead ends: 170 [2021-12-21 10:19:38,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:38,347 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:38,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 255 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-21 10:19:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-12-21 10:19:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.12) internal successors, (140), 125 states have internal predecessors, (140), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-21 10:19:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2021-12-21 10:19:38,362 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 103 [2021-12-21 10:19:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:38,362 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2021-12-21 10:19:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2021-12-21 10:19:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 10:19:38,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:38,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:38,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:19:38,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:38,578 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash 506808435, now seen corresponding path program 1 times [2021-12-21 10:19:38,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:38,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850099847] [2021-12-21 10:19:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:38,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 10:19:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 10:19:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:19:38,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850099847] [2021-12-21 10:19:38,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850099847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570029194] [2021-12-21 10:19:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:38,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:38,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:19:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:19:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:38,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:19:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:19:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 10:19:38,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:19:38,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570029194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:38,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:19:38,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-21 10:19:38,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204032515] [2021-12-21 10:19:38,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:38,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:38,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:38,960 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:19:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:39,042 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2021-12-21 10:19:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2021-12-21 10:19:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:39,043 INFO L225 Difference]: With dead ends: 283 [2021-12-21 10:19:39,043 INFO L226 Difference]: Without dead ends: 151 [2021-12-21 10:19:39,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:39,044 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 144 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:39,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 214 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-21 10:19:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-21 10:19:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.104) internal successors, (138), 125 states have internal predecessors, (138), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-21 10:19:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-12-21 10:19:39,057 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 103 [2021-12-21 10:19:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:39,058 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-12-21 10:19:39,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:19:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-12-21 10:19:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 10:19:39,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:39,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:39,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:19:39,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:39,277 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1772033550, now seen corresponding path program 1 times [2021-12-21 10:19:39,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505170425] [2021-12-21 10:19:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:39,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 10:19:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 10:19:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:19:39,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505170425] [2021-12-21 10:19:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505170425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:39,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:39,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:39,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365382239] [2021-12-21 10:19:39,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:39,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:39,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:39,369 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:39,637 INFO L93 Difference]: Finished difference Result 300 states and 328 transitions. [2021-12-21 10:19:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 10:19:39,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2021-12-21 10:19:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:39,638 INFO L225 Difference]: With dead ends: 300 [2021-12-21 10:19:39,638 INFO L226 Difference]: Without dead ends: 151 [2021-12-21 10:19:39,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-12-21 10:19:39,638 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 167 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:39,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 673 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-21 10:19:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-21 10:19:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.096) internal successors, (137), 125 states have internal predecessors, (137), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-21 10:19:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2021-12-21 10:19:39,652 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 104 [2021-12-21 10:19:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2021-12-21 10:19:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2021-12-21 10:19:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 10:19:39,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:39,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:39,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-12-21 10:19:39,654 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash 125463216, now seen corresponding path program 1 times [2021-12-21 10:19:39,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:39,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523062217] [2021-12-21 10:19:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:39,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 10:19:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 10:19:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:19:39,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:39,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523062217] [2021-12-21 10:19:39,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523062217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:39,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:39,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:39,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875661580] [2021-12-21 10:19:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:39,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:39,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:39,762 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:40,000 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2021-12-21 10:19:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2021-12-21 10:19:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:40,001 INFO L225 Difference]: With dead ends: 151 [2021-12-21 10:19:40,001 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 10:19:40,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-12-21 10:19:40,002 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 190 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:40,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 564 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 10:19:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 10:19:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 10:19:40,002 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-12-21 10:19:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:40,002 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 10:19:40,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 10:19:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 10:19:40,002 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 10:19:40,004 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 10:19:40,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-12-21 10:19:40,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.